Definition

1. Adjective:
   • (Of plants) requiring protection from frost: Describes plants that can tolerate cool conditions but are not fully resistant to freezing temperatures and must be shielded from frost to survive.

Usage

• This term is used almost exclusively in gardening, horticulture, and botany to classify plants based on their cold tolerance.
• It is typically used attributively (before a noun) to describe the type of plant.
• Example: "These are half-hardy perennials, so we must bring them indoors before the first frost."

Examples

• Adjective:
  • Gardeners often start half-hardy plants indoors during late winter.
  • Petunias and marigolds are common examples of half-hardy annuals.
  • The label clearly stated the shrub was half-hardy, so we provided a protective mulch for its roots.

Advanced Usage

• "Half-hardy annual": A plant that completes its life cycle in one year but is not frost-tolerant. It is often sown under glass and planted outside after the danger of frost has passed.
  • We grew half-hardy annuals like zinnias and cosmos for summer color.
• "Half-hardy perennial": A perennial plant that may survive winter in mild climates or with protection but is likely to die in a hard frost.
  • In our region, fuchsias are treated as half-hardy perennials and are often overwintered in a greenhouse.

Variants and Related Words

• Hardy (adj): (Of a plant) able to survive outdoors in winter without protection from frost.
  • Hostas are hardy plants that return every spring.
• Tender (adj): (Of a plant) easily damaged or killed by frost and requiring significant protection or indoor cultivation in winter.
  • Basil is a tender herb that cannot withstand any frost.

Synonyms

• Frost-sensitive: Susceptible to damage from frost.
• Cold-tender: Not fully tolerant of cold temperatures.

Antonyms

• Hardy: Fully resistant to frost and cold winter conditions.
• Frost-hardy: Specifically able to withstand frost.

Adjective

1. (of plants) requiring protection from frost
   • half-hardy annuals