harden

(redirected from hardening off)
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harden

a rough fabric made from hards
References in periodicals archive ?
If frost is forecast during the hardening off period, provide additional protection by stuffing straw into the cold frame.
Sow seeds singly in pots indoors on a windowsill or heated propagator in late April and grow in a cool room, gradually hardening off the plants.
Begonias and busy lizzies, for instance, are very easily killed by late frosts, even after hardening off.
Hardening off is just getting them acclimatised to the colder nights outside and you an use a cold frame or even the shelter of a wall to give them a bit of half-way protection.
Continue hardening off tender bedding for outdoors.