harden off


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Encyclopedia.

harden something off

to accustom a young plant to normal weather so it can be moved from a protected environment to the out-of-doors. We put the plants by the open window to harden them off. We hardened off the plants.
See also: harden, off
References in periodicals archive ?
Harden off summer bedding, checking the forecast and covering the plants with horticultural fleece if frost is forecast.
Start to harden off bedding plants in a garden frame.
Harden off aubergines, courgettes, marrows, peppers, pumpkins and tomatoes grown from seed before planting outside.
Clear out spring bedding and begin to harden off summer bedding plants.
HARDEN off sweet pea seedlings in a cold frame ready for planting out at the end of the month.
9 START to harden off the hardier bedding plants such as antirrhinums.
By midmonth stop fertilizing perennials, roses, shrubs, and trees and gradually cut back on irrigation to harden off plants for winter.
Harden off aubergines, courgettes, peppers, pumpkins and tomatoes grown from seed before planting outside.
Harden off autumn-sown cauliflowers being over wintered in frames, so they will be ready for planting out in March.
I DON'T have a cold frame to harden off my bedding plants.