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Half-hardy
A plant that will tolerate cooler temperatures. Half-hardy plants may be grown outdoors in summer, but won't survive frosts. Half-hardy shrubs and herbaceous plants may survive an average winter in sheltered or warm environments.
Half-standard
Refers to trees whose trunks are unbranched up to 3-4ft from ground level. Also applies to plants having significantly shorter stems than standard forms.
Hardening off
The process of acclimatising plants to lower temperatures, usually following their raising under cover, such as in a greenhouse, prior to planting out in open ground.
Hardy annual
An annual plant, the seeds of which can tolerate sub-zero winter temperatures and whose seedlings can survive spring frosts.
Hastate
A leaf that's shaped like the point of a spear, with broad, pointed lobes at the base on either side of the leaf stalk or stem.
Haulm
The foliage and stems of vegetable crops, such as potatoes, beans, peas, etc. Also known as bine.
Pagination for glossary terms starting with the letter "h"
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