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Half-hardy perennialA plant that lives for more than two years. They cannot tolerate heavy frost (temperatures below 0oC) but may be over-wintered if given frost protection.
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Half-hardy perennialrefers to a perennial plant that is tolerant of some frost and whose roots come back the next growing season in a moderate climate, but that is not tolerant of severe cold weather; an example is Mexic [..]
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Half-hardy perennialA perennial that can be grown outdoors during the summer months but that needs to be protected from frost during the winter.
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