Dahlia (Dahlia variabilis)
Description
Growing dahlias from seed is a wonderful way to discover your own new variety! Dahlias grown from seed do not grow true to the mother plant, but each seed produces a new dahlia. This is how dahlias are bred. And yes, dahlias that are grown from seed produce tubers too!
Details:
Plant Type: Perennial
Height: 24-60”
Site: Sun
Days to Maturity: 75-120 days, depending on variety
Plant Spacing: 9-12”
Kids, Pets and Deer: non-toxic to humans, toxic to cats, dogs, horses
Indoor & Pots: grows best in the ground
How to Grow:
For transplanting (recommended): sow seeds 6-8 weeks before the last frost. Cover them with a growing medium and keep the soil surface moist until they sprout. Once the seedlings have true leaves, move them to larger cell packs. Ensure they don't become root bound and avoid disturbing the roots.
For direct seeding (only for areas with long growing seasons): plant after the last frost when the soil temperature is between 65-70°F (18-21°C). Sow seeds thinly at a rate of 2 seeds per foot and cover them lightly but firmly to a depth of 1/4 inch. Maintain soil moisture until the seeds emerge. Once the first true leaves appear, thin the seedlings to 9-12 inches apart.
Germination: 5-10 days at 65-70°F (18-21°C).
Where to plant: Well draining, sunny spot
Harvesting/Vase Life : Harvest before the flowers are fully open.
Dahlia flowers are not known for their long vase life. To increase their longevity, place the cut stems in 3 inches of very hot water (cooled down slightly from boiling temperature) and keep them there until the water has cooled. This will help your dahlias last for 4-6 days.
Then, re-cut the stems to the desired length to fit your vase and place them in cool water with flower food.
Change the water in your vase daily and keep any leaves or dropped petals out of the water.