The roots may be brought into the greenhouse, pit, cold frame, or cellar during the winter and forced.
When established remove them to a cold frame and harden off.
All too often, outdoor seed bed plants are set where cold frame or at least cloth cover should be employed.
In winter keep them in a cold frame, and as dry as possible.
It will thrive in a cold frame, and requires protection from excessive wet only, rather than from cold.
After planting, the pots may be watered and placed in a cold frame, plunged in cocoa fibre or ashes.
When forward enough, prick out in a bed of light rich soil in a cold frame, and give plenty of air.
The cold frame was full of thrifty seedlings—Primroses, Iceland poppies, and other beauties.
They must be kept during the summer months in a shady place, and have a cool bottom to stand on; a cold frame is the best.
If one can command a cold frame still earlier sowing of transplantable annuals is desirable.