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Growing requirements from the plant library. Cultivar and local conditions can change the details.

Care decision	Garden dahliaDahlia garden hybrids (mixed parentage)
Light	Full sun is preferred; hot sites may need locally appropriate relief from intense exposure. NC State Extension: Garden dahlias
Water	Maintain moisture during active growth without leaving the soil saturated. NC State Extension: Garden dahlias
Soil & growing mix	Fertile, well-drained soil; dormant tuberous roots are vulnerable to rot in wet conditions. NC State Extension: Garden dahlias
Mature size	Cultivars span roughly 1–6 feet tall and 1–3 feet wide in NC State’s garden account; verify the selected cultivar. NC State Extension: Garden dahlias
Growing season	Summer into autumn, ending with damaging frost in cold climates. Utah State: Dahlia cut flower production
Winter & climate	Tender perennial. Overwintering outdoors depends on local winter temperatures and drainage; lift or replace where survival is unreliable. RHS: Growing dahlias
Container fit	Container choice matters. Check mature size and root-space guidance in the reference.
Place & variety	Heat tolerance and winter survival are separate limits. NC State notes that dahlias can struggle in summer heat despite their warm-region origins. Outdoor survival in mild, freely draining sites does not establish reliability in a cold or wet garden. NC State Extension: Garden dahlias
Equipment to consider	VELCRO Brand ONE-WRAP Garden Ties, 50 feet x 1/2 inch FELCO 6 bypass pruning shears
Evidence & next steps	Bulbs & summer tubers guides → Choose Dahlia Starts and Pinching for the Flowers You Want First Leave Summer Bulbs in the Ground or Store Them? Decide by Species and Climate When to Deadhead Flowers—and When to Leave Them Read the growing reference NC State Extension: Garden dahlias RHS: Growing dahlias

These facts help compare choices. They do not establish that plants can share a pot, watering circuit or outdoor site. Check the full reference and local suitability before planting.

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