Greenhouse Propagation

With the chilly and rainy weather of winter, a cozy place to work is inside the island’s cedar greenhouse located in the Rose Terrace Garden below the water tower. The temperature of the greenhouse averages 50 F during the day, even though it is in shade for most of the day.

 We are busy sowing seeds for winter annuals and bulb cover for the spring. Volunteers have helped sow flats of Calundula, Lobularia, and Shirley poppies (Papaver rhoeas). We have also started summer annuals of zinnias and hollyhocks.

Calundula seedlings in the greenhouse. Photo by Shelagh Fritz

 A fun experiment was collecting and sowing seed from the survivor artichoke. Sarah Dominsky, an intern with the Golden Gate National Parks Conservancy, harvested the thistle seed head from the garden affectionately called the Toolshed Terraces in November.

Sarah harvesting the artichoke seeds. Photo by Shelagh Fritz

Out of more than 50 seeds sown, only one actually germinated!  This one little plant is being fussed over and was potted up into a larger sized pot last week. To help preserve the genetic material of island survivor plants, we are able to collect seeds and take cuttings of plant material. With the completion and dedication of the greenhouse to Carola Ashford this past April, we have been able to grow our own annuals, propagate perennials and continue the tradition of propagation on the island.

This entry was posted in Plants, Volunteers. Bookmark the permalink.

Comments are closed.