harden

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For plants that have been nurtured in a glasshouse or other protective environment, it is not wise to rush the hardening off process as one cold, wet night outdoors could ruin months of loving care s now have been grown in very sheltered conditions under s 2 Divide and conquer - now that many spring plants have given us a wonderful display, it is time to thing about lifting, dividing and replanting them - Pulmonarias and Primulas are two that really respond to this treatment BLOOMING: Hawthorn Blossom, a stunning herald of spring but also an indicator of warmer weather on the cards
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.
The main activity this month with bedding plants is hardening off.
The runner beans are all still in the cold frame as the process of hardening off (acclimatising them to life outdoors) begins, while the butternut squash and leeks have yet to venture outside the greenhouse.