harden

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harden

a rough fabric made from hards
References in periodicals archive ?
Tot plants might not survive in the open unless they are hardened off
The foliage of plants that have been reared inside is very soft and it is important they are hardened off before being planted out otherwise they risk taking a bit of a set-back.
Gambling on a frost-free May should not be a problem, however, if tender plants have been hardened off properly by placing outside during the day and moved under cover at night.
N Sweet peas sown in January should be about ready for planting, if they have been well hardened off.
Close up a bit later each night and if no frost is forecast after a couple of days you can leave the lights, door and so on open a little overnight, opening a bit more each evening until eventually the frame or house is open day and night by which time the plants should be hardened off enough to survive.
FOR a crop or French beans in July sow some seed in small individual pots now and the seedlings will then be ready for planting out towards the end of May, once they have been thoroughly hardened off.
They can be hardened off in early May and planted in their final position a few weeks later.