Cole crops, Swiss Chard and pansies (started in January) were started in early February using heat mats and LED lights. (BTW, Cole crops are veggies like broccoli, cabbage, cauliflower, kale and the like). Mid March the transplants went out to the cold frame. Subsequently, most of the plants took off like a rocket!
The cold frames are made of landscape timbers, lined with one inch foam board. Weed cloth is placed on the ground bottom and the top is hinged 1/4 inch poly carbonate panels.
I use bricks to prop open the top panels when weather allows. All of the crops in the cold frame are now hardened off to moderate cold temperatures 27° – 32° (F).
Fertilizing with seaweed emulsion is the only additional feed used to enhance growth and to immunize for stress.
All of these transplants will be in the ground shortly. They should take off quickly in the cooler soil!
More new info to come!