(botany) A plant which requires protection against frost.
Half-hardy Sentence Examples
It is grown in conservatories for half-hardy plants.
Some of the more popular annuals, hardy and half-hardy, have been very much varied as regards habit and the colour of the flowers, and purchases may be made in the seed shops of such things as China asters, stocks, Chinese and Indian pinks, larkspurs, phloxes and others, amongst which some of the most beautiful of the summer flowers may be found.
The half-hardy series are best sown in pots or pans under glass in mild,heat, in order to accelerate germination.
Noble half-hardy bulbs, for planting near the front wall of a hothouse or greenhouse; the soil must be deep, rich and well drained.
Pot off tender annuals, and cuttings of half-hardy greenhouse plants put in during February to get them well established for use in the flower garden.