Half-hardy

Term used for plants that can generally only be grown outdoors during the summer but which may survive mild winters outdoor in a sheltered position

Half-Hardy

Just as the word depicts, not completely hardy. Good examples re pansies, snapdragons, sweet alyssum. They will tolerate some light frost and cold nights.
Found on http://www.emilycompost.com/garden_glossary.htm

Half-hardy

Applied to annuals, this indicates that a plant is able to cope with temperatures down to 0°C (32°F) but not hard frost.
Found on http://www.bbc.co.uk/gardening/htbg/glossary/half-hardy.shtml

half-hardy

[adj] - (of plants) requiring protection from frost
Found on http://www.webdictionary.co.uk/definition.php?query=half-hardy

half-hardy

adjective (of plants) requiring protection from frost; `half-hardy annuals`
Found on http://wordnetweb.princeton.edu/perl/webwn?s=half-hardy

Half-hardy

Plants unable to survive the winter without protection. Examples include runner beans and sweetcorn.
Found on http://www.gardeningdata.co.uk/glossary.php

Half-hardy

(1) Applied to a plant that can withstand average winters outdoors but needs protection from severe frost. (2) A plant which is so susceptible to frost damage that it can only be grown outside during the summer.
Found on http://www.seasonalgardening.co.uk/garden_glossary.html

Half-Hardy

Refers to plants that can withstand long periods of damp or cold weather but may be damaged by frost.
Found on http://www.lowes.com/cd_Gardening+Glossary_1329393337_

Half-Hardy

Able to withstand occasional light frost, but damaged or killed by prolonged exposure to subfreezing temperatures. The term is not precise because some half-hardy plants can be left outdoors in winter in mild regions of the country.
Found on http://www.pcmg-texas.org/glossary_gardening_landscaping.htm
No exact match found