- Common Name(s):
- Poisonous Plants, Summer Bulbs
Dahlias are the darlings of the late summer garden. Visit any county or state fair in the autumn and you will likely find dozens of dahlias. The array of flower colors, sizes, and shapes is astounding. Check out the American Dahlia Society website for the many classifications and colors.
Dahlias are available in almost any color: white, shades of pink, red, yellow, orange, shades of purple, and various combinations of these colors. Some of the flower forms are truly amazing, from the charming single, daisy-like flowers to the popular double varieties which can range from the 2-inch-pompons to 12 inches across. Some of the most spectacular are the peony and cactus forms.
Any garden with fertile, well-drained soil and lots of sun can become a home to dahlias. Since all garden dahlias are hybrids, they are most often planted as tuberous roots. Seeds are available for mixed, small-flowered types. Plant the tuberous roots or plants about the time of the last frost date. Varieties that get taller than 2 feet may need stakes or other supports. Dahlias may languish during the heat of summer, but keep them mulched and provide plenty of water and they will reward you with a show from late summer through fall.
The tuberous roots will not survive winter in the ground in most of the Piedmont region and the western part of the state, so those of us in these regions must be prepared to dig roots in the fall to store during the winter. The dahlia is hardy in the Raleigh area and east to the Coast.
Regions: Coastal Plain, Piedmont, Mountains
- Tuberous rooted, perennial herbs; leaves pinnately lobed or divided; flowering heads large, with many petals, variously colored
- Full morning sun
- Most colors
- 1-8 ft.
- 1-3 ft.
- Cover 3 in.
- Tuberous roots
- Tender III - injured below 25 degrees F (2 degrees C)
- In Zone 8 harvest tuberous roots in fall, dry carefully (do not wash), and store in vermiculite or dry sand at 35-45 degrees F (2-7 degrees C). In Zone 7, just mulch.
- Tropical America
- Poison Part:
- Leaves and tubers (resemble thickened roots)
- Poison Delivery Mode:
- Skin irritation following repeated handling of the tubers and contact with leaves and light
- Toxic Principle:
- Phototoxic polyacetylene compounds
- TOXIC ONLY IF LARGE QUANTITIES EATEN.
- Found in:
- Houseplant or interiorscape; landscape in flower garden as herbaceous annual or perennial
NCCES plant id: 1020