Perry-Winkle Farm
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Collapse ▲Photos and text by Debbie Roos, Agricultural Extension Agent.
Transplant Production
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A healthy crop starts with a healthy transplant. Most vegetables at Perry-winkle farm are transplanted except for beans, okra, carrots, beets, and salad greens which are are direct-seeded. The majority of the flowers are also transplanted, except for zinnias and sunflowers.
In the photo above, Perry-winkle farmworker Chris opens the compost tumbler which they use to mix their own special blend of potting mix. They augment commercial soilless mix (Fafard #2) with vermicompost (worm castings), rock phosphate, and bloodmeal for their transplant mix. Perry-winkle employs 3-5 part-time farmworkers throughout the season.
All the transplants at Perrywinkle are grown in this passive solar greenhouse constructed from Hebel block – aerated autoclaved concrete that is very strong and lightweight with excellent insulating properties.
Greenhouse interior in early May. No supplemental heat is needed, even during the winter when day-time interior temperatures can reach in the 80s on a sunny day. At night the greenhouse keeps temperatures above freezing.
Summer interior temperatures can be kept comparable to the outdoors by opening vents in and over the doors and with a series of vents across the front of the house at bench height.
The roof and glass sides of the greenhouse were oriented so that the low angle of the winter sun would fully penetrate the interior. In summer, the house is kept cooler since the high angle of the sun does not reach all the way into the interior.
Close-up of underside of eggplant leaf with aphid mummies.
