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These easy-to-grow flowers are perennial in warmer climates and are considered hardy annuals in areas below USDA hardiness zone 8. Dahlias thrive in full sunlight and well-drained soil with an ...
Dahlias are perennial plants with tuberous roots. They are not frost hardy, and require protection from frost if grown in regions with cold winters. While some have herbaceous stems, others have stems which lignify in the absence of secondary tissue and resprout following winter dormancy, allowing further seasons of growth. [5]
Experienced gardeners keep an eye on the weather forecasts at that time of year and are on standby to protect their gardens overnight with horticultural fleece (or a sheet or blanket) if frost threatens. Tender annual or perennial plants treated as half-hardy annuals, purchased as young plants, and hardened-off outdoors when all danger of frost ...
Tender plants are those killed by freezing temperatures, while hardy plants survive freezing—at least down to certain temperatures, depending on the plant. "Half-hardy" is a term used sometimes in horticulture to describe bedding plants which are sown in heat in winter or early spring, and planted outside after all danger of frost has passed.
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Dahlia 'Mrs Eileen' is a branching, tuberous, tender, perennial cultivar with bright orange flowers, as large as 6-8 in. wide (15–20 cm). This dahlia belongs to the Formal Decorative Dahlia classification. Plant Profile: Height:36-48 in. (90–120 cm); Spread: 45 cm (18 in); Hardiness: Half hardy