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Double Extreme Dahlia

Rewarding you with beautiful flowers by the middle of summer, Dahlias are not difficult to start from seed, grow quickly plus you can dig up the tubers and store them for the next season. Richly colored blooms in the shades of a magical sunset are abundant in this mix. Consistently blooming with double and semi-double flowers in deep rose, burgundy, light pink, yellow and orange blushed with pink edges. 2 ½ feet tall            

50 seeds




Dahlia variables


Germination: 15-21 days

Germination Temperature: Optimum soil temperatures 65--70ºF

Seed Planting Depth: Sow on the surface and lightly cover the seed

Starting Indoors: Start indoors 6-10 weeks before the last frost. Provide 65-70ºF soil temperatures. Transplant after the last frost date, 18-24” apart.

Sowing Outdoors: Direct sowing outdoors only in areas with a long growing season

Growth Habit: Upright

Height and Width:  30-36" by 18-24"

Spacing: 18-24" apart

Light Needs: Sun

Soil Needs: Average to fertile, well-drained

Approximate days to flower from seed: 80-90 Days

Uses:  Flower Beds, containers, cut flowers

Care: Water seedlings regularly until established. Amend soil with compost before planting. During the heat of summer, they will need to be watered a few times a week. Apply a liquid fertilizer every 3-4 weeks or use a time-release fertilizer at planting time. Supply a support structure for Tall dahlias when they are blooming. Dig tubers in fall to store over winter for planting the following season.


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Customer Reviews
4.4 Based on 5 Reviews
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Joyce L.
United States United States
I recommend this product

I ordered early in the season online and my order arrived quickly.

A Pinetree Garden Seeds Customer
Hannah W.
United States United States
Grew well

These are about to bloom! I planted the seeds in pots and got them growing in my greenhouse. I’m excited to see what they look like when they bloom!

United States United States
Great Germination

Switched to Pinetree from the larger seed companies that I have used for years, primarily because I like the small seed packet size. I am pleased with the packaging, the information ON the packaging, and the fact that I got 100% germination on the first 3 varieties I started in half the MINIMUM days projected on the package. No guarantees that my incompetence won’t **** the seedlings at some point, but that's on me. I'll likely amend the rating once I see the grown plant (hopefully).

United States
Germinated so quickly

So pleased with how quickly they sprouted! Thanks!

Stacy C.
Rome, GA, US
Germinated great!

These germinated quickly and have a relatively short bloom to harvest time, The seedlings are growing fast and look very healthy. I came back and bought 2 more packs.