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Author Archives: Shelagh Fritz
Late winter and early spring are ideal times to divide perennials on Alcatraz. As we do not (typically) receive frost, plants never go fully dormant as in northern climates, but herbaceous plants do slow their growing of new leaves. This window is perfect for dividing bearded iris. The plants have not yet put valuable stored energy into producing new leaves, and instead can expend energy into forming new feeder roots once it has been replanted. Once established, new leaves are produced. We have found that mature clumps of iris will still flower the same year that they were transplanted, but smaller pieces of an iris rhizome may take up to two years to flower.
Generally, we aim to divide our iris
every three years, just like the Ruth Bancroft Garden does with Ruth’s heirloom collection of iris. Happy iris become overgrown and the thick rhizomes start to crowd each other, growing over top of one another. Overgrown iris can lead to several problems – poor air circulation which increases rust on the leaves, the roots competing for nutrients in the soil, and the centers of the iris clump will become bare of leaves and not produce any flowers at all. It’s easy to tell when you should take on the project of dividing your own iris if you look for these signs.
The garden volunteers divided the tall scented bearded iris in the Prisoner’s gardens this week. Four separate patches of iris were divided, and we ended up with not only the beds replanted, but with five bins of extra iris!
The iris bloomed really well last year, but as we add fresh compost to enrich the soil, the rhizomes were becoming buried. Iris likes to be planted very shallow, with the backs of the rhizome sitting above the soil.
One of the volunteers showed me an interesting feature about the rhizomes that I didn’t know before. Looking at the underside where the roots grow from, holes are visible. These were where the roots had grown from. The rhizome grows from one end, and the older end becomes a storage unit for energy (much like a potato). When dividing iris, the older sections are broken away and only the piece with the roots are kept. We are curious to see if the older section will sprout roots, so we placed a few in a pot in our greenhouse to see what happens
Now we are busy trying to find new homes for the divided extras, these are my favorites and I can’t bear to compost them.
A key component to historical garden restoration is to document our work. As we have replanted a few garden beds this season, we are now following up the work with ‘after’ shots.
The little roadside bed that we fondly call the Chapel Bed was renovated this past August, and it is really coming into its own with the spring show of daffodils.
For snow bound East Coasters,
probably smelling our scented heirloom daffodils in January is a treat for the senses.
Including the daffodils, just in this tiny bed, there are five different plants blooming right now. There is the red valerian, Centranthus ruber, Hebe, and Verbena bonariensis. The mix of purple, red and yellow just say ‘spring is here’.
The plants not in bloom are building up to put on a great show for the summer. Already, the Tower of Jewels, Echium pininana, has doubled its size many times over. We dug up a seedling elsewhere on the island and planted it on the corner knowing that it will demand attention from the visitors walking by. Right now, it is quietly doing its own thing, growing a little each day and probably doesn’t even get a glance from the thousands of people passing by – but just wait – by the end of the summer it will reach 10 feet high and will be the star of the bed. The Tower of Jewels showed up in newly acquired historic photo along the main roadway, so it was appropriate to replant it.
Another silent wonder in this bed unfortunately will not get a season to shine. This, of course, is the new compost that was added. Rich in organic matter and worms, the compost is from our own award winning recipe and is the essential building block.
All too often, home gardeners are so eager to plant that the important step of soil preparation is missed. Amending a bed is the most physically challenging part, but the effort will be rewarded. Compost should be mixed in with the existing soil, so the plants get extra nutrients but also get accustomed to the native soil.
As the arm chair gardeners sit out the rest of the winter looking at seed catalogues, don’t forget about your soil and plan to give it some extra attention this spring.
Our winter renovation projects are moving right along even though we are still waiting for rain.
The toolshed terraces have never really
been overhauled in the years of the garden restoration project, other than the removal of forty years of overgrowth to allow the survivor plants some breathing room.
The terraces were built by the inmates of the Federal prison in the early 1940s and was tended up until 1963 when the prison closed. The Mediterranean plants, such as Chasmanthe, Echium, Aeonium, artichokes and Sedum praealtum have thrived, plus the tough Rose ‘Felicite et Perpetue’ is still holding its own. The majority of these plants put on a great spring show but by July, the garden is looking like the ugly duckling with no hint of really how pretty it is.
Other than needing plants to bloom throughout the year that will tolerate the dry, windy slope, we needed two main ingredients – better soil and an irrigation system.
Normally, bringing in supplies to the island is a chore, but luckily, our compost pile provides rich compost. We did purchase chicken manure that was brought out on the monthly barge. We installed drip line irrigation so we will not have to wrangle the hose up and down the fragile terraces. Even though all of our chosen plants are drought tolerant, the plants will do better with weekly deep watering.
The succulents growing across the road provided inspiration for the corner of the terraces. We had Dudleya, Echeveria and Aeonium cuneatum on the island already from a planting project this past spring. The seagulls took a liking to the plants and we ended up rescuing the plants and placing them in the greenhouse to nurse them back to life. Let’s hope the seagulls leave them alone in this garden! A few larger Agave attenuata were planted as well to tie in with the established Agave.
We had taken cuttings of the Crassula ovata and these propagations were planted on lower terraces to carryon the block of plantings.
We also added Fremontodendron californicum (flannel bush) to this garden. And an interesting fact – this is the last plant that we needed back on the island from the plant lists that were mentioned in the 1996 book The Gardens of Alcatraz.
The Leonotis leonurus, lion’s tail, that was planted in the lawn borders have been receiving a hugs amount of attention, and so we added in more on the terraces to give a punch of orange throughout the summer and fall. Purple Limonium perezii were added in as well, as they are great for seaside conditions.
We wanted to add a bit more red and purple so we introduced Asclepias curassavica and purple trailing Lantana to the mix.
One thing that needs to be finished yet it to divide the surviving bearded iris! They don’t ever seem to slow down.
With the fence removed, visitors are now strolling past this garden to get a better look I can’t wait to see how the garden will only get better.
As the end of December approaches and we get into the depths of winter (California winter, of course), we are busy with our planting projects in the gardens.
High on the ‘to-do’ list was to replant a terraced garden in Officers’ Row, the eastern facing gardens. These gardens were first rehabilitated in 2006 and looked fantastic for the first 8 years, but had noticeably declined this past summer. This garden is open every Wednesday for our casual garden viewing with a gardener present so it was vital that our showcase garden impressed our visitors.
The gardens were designed by the late Carola Ashford, the first project manager, to resemble the cutting flower gardens created by the wives of the federal penitentiary during the 1940s and 1950s. She selected perennials and bulbs that would give year-round color based on a few key photographs.
In the photos, reds and yellows are predominant, so Gaillardia ‘Burgandy’ and ‘Goblin’ were selected to give the cheerful look. Yellow Aurinia saxatilis, gold basket, was chosen to edge the pathway mixed in with blue Muscari, grape hyacinth, for a spring mix. Heirloom daffodils were planted in rows to bloom successively through the spring months. As the garden matured, many of the neat planting rows were beginning to meander, and the perennials were not blooming as fiercely as they once had.
While we could have gone back to Carola’s original planting plan and done the same, this was an opportunity to introduce a few new plants to Alcatraz that provided the look we were after.
The first step was to supplement the soil with rich compost from our own pile and chicken manure that we had purchased. The sparrows had a field day scurrying around after insects.
The burgundy gaillardia was replaced with Coreopsis tinctoria ‘Tiger Stripes’ that has a brilliant mix of red and yellow on each flower. This is a very forgiving perennial that also makes a great cut flower, plus it is also an heirloom plant, first introduced in 1885. We did keep the Gaillardia ‘Goblin’ but needed to transplant a few of the plants to keep the orderly lines of cut flowers.
We have become big fans of Coreopsis!
We also introduced Coreopsis grandiflora ‘Sunburst’. This is a great bloomer with golden flowers. The coreopsis does perform better when regularly deadheaded but this garden task is very meditative.
We had also noted that the garden was lacking in fall blooms – we would always make an emergency trip to the local nursery for some fall plants to fill in the blanks when the iris and dahlias had died back. This past fall we purchased Rudbeckia, black eyed Susan, to give us the extra color we needed, and they were very happy on the island. So happy that they spread! Not a lot, but they were wandering. We never had the heart to weed out the strays, and the neat lines of a cutting garden were beginning to be lost.
The bearded iris also needed rethinking. This was a difficult one, as they are legacy plants to the gardens. Mostly blooming in spring, the large section of iris would remain barren and become a chore to nip the brown leaf tips throughout the rest of the year. We dug up the entire patch (and hopefully got rid of some nasty grass with long rhizomes as well) and tucked a single row of iris between the gaillardia and the coreopsis. The iris blooms should rise above its neighbors and then we can cut the foliage back to be hidden by the other perennials.
We also added in a few missing plants – a couple of Limonium perezii (statice), penstemon (beard tongue), and centranthus (Jupiter’s Beard). With Centranthus being a notable naturalizer, I refused to buy one. Ironically, we had to hunt around for a seedling of a red centranthus, the gardeners do a great job of removing them.
The daffodils remain to be tackled though. This will need to be done in the spring when we can identify each flower. The dahlias and the daffodils are inter-planted as they bloom at different times of the year. Unfortunately, with constant digging in this bed, the neat rows of heirloom daffodils have become interspersed with each other. The daffodils will need dividing anyway, as they have formed big clumps that are forcing themselves out of the ground.
All in all, it was a great week to be in the gardens. Now we just need some rain.
Two similar plants that often get confused are mallow (Lavatera) and hollyhock (Alcea). A quick glance at these two and it is easy to see how they can be mistaken for each other.
Both plants belong to the same family of Malvaceae, and so they do share many common characteristics. The flower is the most obvious similarity. Resembling a hibiscus flower, the lavatera is very showy in shades of
pink, red and white. The flower of the hollyhock is also very pretty and in similar shades. Both plants can be annuals, biennials or perennials, although the Lavatera is more often seen as a shrub in gardens while the hollyhock is typically a biennial with a stalk of flowers during its second year.
The hollyhock, with its 60 species, is native to Asia and Europe while the Lavatera, with 25 species, is more of a world traveler. Its range is in the Mediterranean region, central and eastern Asia, Australia and from California to Mexico. Looking at the adaptability of the Lavatera, its no surprise that it can tolerate a wide range of soil to grow in. It actually prefers sandy, rocky or even clay soil in coastal regions (perfect for Alcatraz!). The hollyhock is a bit more fussy preferring rich, well drained garden soil.
On Alcatraz, we have introduced the mallow,
Lavatera assurgentiflora. Native to the Channel Islands, it has naturalized to the coastal areas of Southern California. We have had it in our Prisoner Gardens on the west side of the island for over a year now and it is doing extremely well. The shrubs have grown to 4 feet tall and wide, and have been consistently blooming for most of the summer and is still going strong.
Most of our hollyhocks have set seed already and we will have to replant them again next spring.
Both hollyhocks and mallows are good for hummingbird and butterflies.
We often tell visitors the common name of the Lavatera is mallow, which then leads to them asking if this is where marshmallows come from? The answer is ‘no’, marshmallows were originally derived from the plant Althaea officinalis, native to Egypt, but it is a member of the Malvaceae family.
Both Lavatera and hollyhock fit nicely with the cottage garden style of the Prisoner gardens with our mid1940s time period and we are already looking at seed catalogues for next year to add more to our gardens.
As visitors arrive on Alcatraz, they are greeted by a Park Service ranger who gives them an orientation to the island. The ranger needs to keep the crowd entertained until the entire boat is empty before they can dispense the vital information of where to get the audio tour and a few words of safety.
Each ranger shares different snippets of the island’s history, little teasers to keep people occupied. Having listened to the ‘dock talks’ for more than 6 years now, I’ve heard most of them and to be honest, it’s where I’ve learned most of the more interesting pieces of Alcatraz history.
One of my favorite talks is a true or false quiz. The ranger makes a statement, and then gets people to raise their hands if they think it is true or not. One of the questions is ‘True or False – Alcatraz hosts plants from every continent except Antarctica’. There is usually a split amongst the crowd of those that believe it is true, and those that doubt the statement. But, the answer is TRUE!
Even before we began to introduce plants
to restore the gardens, the plant survey done in 2005 found that there were more than 200 species of plants still surviving on Alcatraz from the gardening days of the military and the federal prison.
The range in plants from the different continents is quite surprising – how could plants that are from drastically different parts of the world all survive on a tiny 22 acre island?
This is one of the aspects of the story of gardens that I love – these surviving plants, introduced years ago, could survive on their own because they each found the right microclimate on Alcatraz to make it.
Here is a partial list of the surviving plants by continents:
North America – Monterrey cypress, Agave americana, Douglas iris, various ferns
South America – Nasturtium, Fuchsia
Asia – bearded iris, Fig tree,
Europe – Bear’s breeches, perennial sweet pea, periwinkle, ivy
Australia – Australian tea tree, New Zealand Christmas tree, Eucalyptus, Cordyline
Africa – Lily of the Nile, Chasmanthe, Pelargonium, Crocosmia
Not only do we have plants from around the world, but we also have visitors from around the world. Again, with the exception of Antarctica.
Gardeners tend to be sharers, whether it be gardening advice, seeds, surplus zucchini or to just share their gardens with others. The inmate island gardeners were no different. They shared flowers with island residents on Sundays by leaving bouquets at the dock, and they traded seeds and gardening advice back and forth amongst themselves. However, one thing that was not permitted on Alcatraz was to visit each other’s gardens.
Inmates Elliot Michener, who gardened the West side Prisoner gardens, and his friend, Richard Franseen, who tended the Rose Terrace on the East side of the island, were not allowed to visit each other’s gardens. With five overlapping years of served time on the small island, the priviledge of enjoying their friend’s garden was withheld – another small reminder to the men that they were still in prison.
Gardeners from around the world now visit the island to see the restored gardens. On behalf of Elliot and Richard, it is our pleasure to share the gardens with them.
On the reverse side, it is also fun to go and visit gardens and be lucky enough to get the ‘special tour’. The horticulture world is pretty small, whether it is the Bay Area, USA or even worldwide, chances are there is a connection that will add a spark to your trip.
I was lucky enough to have Marion Brenner ask me if I could show a couple of her friends from France the gardens while they visited San Francisco. Marion is a longtime friend of the Garden Conservancy and professional photographer and landscape designer. Her work has illustrated many articles in garden magazines and publications, including Martha Stewart Living. Delighted to be asked, I mentioned that I actually had a trip planned to France. Marion quickly put me in touch with her friend, Catherine Delvaux, editor of the bi-monthly garden magazine Detente jardin, who had been showing Marion around Paris for her upcoming book on Parisian gardens.
Catherine generously offered to pick us
up in Paris and drive us to Monet’s Giverny garden – a garden high on my ‘must see list’ While Catherine knew the head gardener, he was pretty busy and we never had a chance to meet. We learned that upon undertaking his position, he had researched which heirloom varieties were available during Monet’s time and has since recreated overflowing beds of color. Monet grouped plants by color so he could study the effect of the lighting on them. In fact, he chose to make Giverny his home because of the quality of light in the valley. Seeing the ‘real life’ version of the lily pond was quite impressive.
Before leaving the tiny village of Giverny, Catherine took us for quick respite from the warm day in a shaded restaurant courtyard just down the street. The restaurant actually had an entire hillside garden behind it that had the starting signs of being neglected and on its way to being overgrown. The little garden had its own charm and not a single person in it, despite the busloads of visitors just down the street.
Catherine next took us to an out of the way garden treasure by the name of Le Jardin Plume. This country garden is also not as popular as the famous Giverny, but it should be. A couple had bought three hectacres of farmland in 1996 and have slowly turned it into many garden rooms separated by shaped boxwood hedges.
Each room is a surprise – we wandered through butterfly gardens, prairie grasses grown in quadrants, and each room offered unique plant combinations. We were able to meet with the owners and I really wished I had paid more attention in my grammar school French classes, but we managed to have a full conversation. Even in French, the word Alcatraz needs no translation.
Being a tourist instead of being a staff member at a famous destination was an eye opener. It is really too easy when we are at work to just focus on getting the tasks done, but on my trip, I’ll always remember the staff that took the extra time to chat or to point out something, or even to just help with directions. So, please, ask the staff and garden volunteers questions! We do love to help and more importantly, we really want to share our gardens with you.
The government shutdown that closed all National Parks, and disrupted many other services lasted from October 1 through October 17. Not only was the closure interruptive to lives and normal routines, but the gardens of Alcatraz were also affected. During the shutdown, non-government employees were allowed on the island only a few days during the 16 day closure. Being Garden Conservancy staff, the two gardeners were in a race to water and care for the 4.5 acres of gardens before the only return boat at 4pm.
On the whole, the gardens fared well, but we still had a few casualties. New plantings were shriveling; leaves from the eucalyptus were piling up on roadways, and the original wooden
doors of the garden ‘closet’ in the basement of the 1940s garden decided to fall down in our absence. With only two weeks of neglect, it is easy to imagine how the neglect of 40+ years after the prison closed in 1963 was nearly the end of these wonderful gardens.
Our drought tolerant gardens were designed to cope with the limited fresh water on the island, not the absence of gardeners to tend them. However, the plants were chosen well and most perked up again after being watered. The gardens on the west side were needed the most attention. During the shutdown, the beautiful weather dried out the soil and the plants were
getting very crispy. The hebe shrub began to wilt and the asters were completed desiccated. The hebe has recovered while the asters were cut back to the ground to come back next year.
The human reaction to not being allowed in the gardens was more surprising. For the first week, having the island just to staff was actually nice (sorry to say). Cell house staff who never venture outside to the gardens were assigned to sweeping roadways and finally saw the gardens that are off the beaten path to the cell house audio tour. After a day or two of this, the visitors were missed, and for the garden staff, not having visitors to share the gardens with was tough.
Garden volunteers, many of whom are retired, suddenly found themselves without anywhere to go. Gardening on Alcatraz is largely a social outing for many people – the team of volunteers are a close knit bunch, who look forward to not only the gardening but to catch up with each other. In total we lost five volunteer days and two scheduled work groups.
Sadly for the many thousands of would-be visitors, they missed out altogether on an Alcatraz experience. The island receives roughly 5000 visitors a day, many of whom are from other parts of the world. A trip to San Francisco isn’t complete unless they see Alcatraz and the other Golden Gate National Recreational Area sites that make the Bay Area so wonderful to visit.
Unfortunately, the appreciation reception for the florilegium exhibit was to be held for 100 guests the evening of October 1. Needless to say, this fundraiser for the gardens had to be cancelled. This was particularly disappointing after so much work had gone into planning both the exhibit and the reception. As well, a visiting group of conference attendees that had been organized by the National Tropical Botanical Garden to visit the gardens on October 5 had to be cancelled.
As the shutdown continued, access to the island for staff slowed down and then halted. As we finished this work week, we are all caught up with sweeping, tidying and watering the gardens. All the volunteers and staff were in a joyous spirit!
Alcatraz garden volunteers have faithfully been monitoring selected native plants on the island since February as part of the California Phenology Project.
The native plants have been scrutinized at least twice a week for growth of leaves, flower buds, open flowers, pollen release, fruits, ripe fruits and seed/fruit drop. For each of these observations, a quantitative estimate is given. Among the native plants that have been closely watched is Coyote brush, Baccharis pilularis.
Plants are fascinating to grow for whatever reasons the gardener finds rewarding – the promise of food, the enjoyment of the flowers, providing habitat, or just for the fun of it. For the phenology watchers, learning each plant secrets has its own rewards that only come after months of observing. The four coyote brush on the island have finally revealed the secret of their sex to us! Alcatraz has two males and two female plants.
Everyone knows that (most) plants have flowers, but many people may not realize that the flowers have male and female parts, and in some cases, that the male and female flowers are on separate plants.
The coyote brush is one of the plants that have the male and female flowers on separate plants. This is known as being dioecious, meaning to have two houses in Greek. The opposite is to have the reproductive parts on one plant, or in one house, being monoecious. What is the difference between the male and female flowers? The male flowers contain the pollen, held on the anthers, while the female flowers open to reveal the stigma and
style. Bees or other insects will take pollen from the male and will brush the pollen on the female flowers in their effort to gather nectar. The female flowers are oblong with a narrow opening at the top. Inside, the pollen will land on the stigma and ‘travel’ down the style to the reach the ovary where the seeds will ripen. Once the seeds are ripe, the seeds will be dispersed by the wind carrying the fluffy tufts away. On Alcatraz, there is a lot of wind, so the seeds are dispersed quickly.
The first male plant began to flower on July 17 and finished flowering September 25.The females flowered next, while the second male plant began to flower September 25 and is still flowering. It is interesting to note that the
male plants are growing on different sides of the island, and have different flowering times. Maybe after a few years of observations, we can draw more conclusions about why this is. By flowering at different times, the cottony female ‘seeds’ are released and float on the wind to be carried away to reach a distant male. This helps to increase the genetic variation amongst a plant population – a cool evolution trick.
Can you think of other plants that have male and female flowers on separate plants?
Here are a few – holly, gingko, kiwi vines and mulberries. Knowing which plants have separate male and female flowers will help gardeners plan their garden. For instance, if you wish for bright red holly berries, you must plant a female bush, but you will also need a male to fertilize it. Or, you should also take into consideration garden maintenance – a messy female gingko tree will drop the fruit or even the female coyote brush may be too messy for some people’s liking.
At any rate, plants can continue to amaze, just take the time to notice them.
Way back in April, our gladiolus corms arrived in the mail from Old House Gardens. We tucked the little corms into the raised bed in front of the greenhouse and have been waiting expectantly for the heirloom flowers to appear.
Over the past two weeks, the flower stalks have emerged from the center of the fan shaped leaves, revealing their bright blossoms a little bit each day. Even though they were all planted the same day, at the same depth, they are not all blooming at the same time, perhaps some are in more rush than others, while the others prefer to take their time.
It would be hard to pick a favorite flower, they are all very pretty, and I can see why this old fashioned flower continues to be popular.
‘Carolina Primrose’, introduced to
the plant trade in 1908 is a small and graceful gladiolus that multiplies each year without much care. According to the growers at Old House Gardens, the corms survive in zone 5! Like many heirloom plants, this corm was collected at an old home site and lucky for us it was found, as it was named ‘Bulb of the Year’ in Spring 2008.
‘Dauntless’ is every bit its name – pink with a dramatic splash of ruby in the throat. This corm is one of the oldest traditional gladiolus offered by Old House Gardens.
‘Bibi’ was offered to the plant trade in 1954. Described
on the Old House Gardens’ website as ‘exotically patterned in a style that dates back to Victorian days, this small-flowered, vibrant pink cutie is randomly flecked with deep rose’. The flower easily blends in with a Victorian garden of the military years or with the hippy flair of the 1960s.
The frosty pink Gladiolus ‘Friendship’ is listed as a ‘landmark pink that has won every prize there is for glads’. In fact, “60-some years after it first bloomed for the legendary Carl Fischer it’s still considered world-class”.
The flower of ‘Melodie’ was a pleasant
surprise, even though I had seen the photo of it before I ordered it. I always wonder if the flower color is enhanced in the plant catalogues, but the photos were right! It is a true pink with a dark scarlet center that is edged in yellow.
‘Contentment’ is a rare corm from the 1957, and despite being once the world’s most popular lavender gladiolus, it has almost stopped being grown by gardeners.
The cute flower of ‘Boone’ will just
leave you wanting to grow more of them. This little guy was rescued from an abandoned homestead in the Appalachians near Boone, North Carolina. It has graceful blooms of soft apricot and it is hardy through zone 6 and perhaps 5 according to Old House Gardens reports.
The Abyssinian gladiolus was documented in the 1996 book Gardens of Alcatraz as growing on the island. The plant had long disappeared when the Alcatraz Historic Gardens project began in 2003, so it was finally time to bring this graceful glad back to the island. Introduced in 1888, perhaps it was grown by some of the military wives in cutting gardens. Collected from the mountains of Ethiopia in 1844, it reached America by
1888 when it was featured as brand new in Garden and Forest magazine. Formerly Acidanthera, it is now called Gladiolus callianthus ‘Murielae’. We ordered 100 of the little corms, most are planted in one raised bed in front of the rose terrace greenhouse, it will be a great site when they are all in bloom.
Our rarest purchase was the
‘Lilac & Chartreuse’ gladiolus. Introduced in, 1960, it is a shame that it is not grown more. The flower is pretty eccentric, just like the 1960s themselves – ruffled and lavender with the chartreuse thrown in.
I hope to add more heirloom gladiolus every year and build up our collection of these wonderful old favorites, and hopefully entice visitors to grow them too.