Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Asteraceae
Native
Mexico and Central America
Life Cycle
Perennial
Plant Height
Tall (Greater than 24")
Flower Color
Mixed
Bloom Season
Summer to frost
Further Information
Plant Characteristics
- Attracts Butterflies
- Attracts Pollinators
- Cut Flower
- Edible Flower
About Decorative Double Blend Dahlia Seeds
Dahlia pinnata
3" semi- and fully-double flowers in an array of colors that may include: yellow, white, pink, red, magenta, plum, and orange.
Planting Dahlia
Plant Spacing
3 seeds every 18" to 24"
Hardiness Zones
10, 7, 8, 9
Light Required
Full Sun
Plant Height
Tall (Greater than 24")
Planting Depth
¼"
Planting Details
| Seed Depth | ¼" |
|---|---|
| Seed Spacing | 3 seeds every 18" to 24" |
| Thinning | When 2 sets of leaves, thin to 1 every 18" to 24" |
| Germination | 5–20 Days |
| Start Indoors | RECOMMENDED. 8 to 10 weeks before your average last frost date. Ideal soil temperature for germination is 65°–70°F. Sow in biodegradable pots; roots are sensitive to disturbance. |
| Direct Sow | 2 to 4 weeks after your average last frost date. |
| Growing & Harvesting | For longest vase life, harvest flowers in the morning and choose flowers with just the outer 2-3 layers of petals open. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
Send Your Recommendation
Total 5 star reviews: 29 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 2 Total 1 star reviews: 0
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Rating
33 reviews
- Hugh P.IL, United StatesVerified BuyerRated 5 out of 5 stars5/8/26Looking good
Good germination and look good after transplanting
Which best describes you as a gardener? IntermediateWho do you grow for? YourselfHow do you prefer to grow? In Ground - Kimberly S.Verified BuyerRated 5 out of 5 stars5/5/26Wow!
Started 20 seeds in soil blocks, 18 popped up within 2 days! Very happy with results, can't wait to see what kind of blooms they'll be!
Which best describes you as a gardener? IntermediateBIBotanical Interests5/6/26Hey Kimberly,
Wow is right! We're so excited to hear that 18 out of 20 of your Decorative Double Blend Dahlia Seeds popped up within just 2 days - that's absolutely fantastic germination! We love that you're off to such an amazing start with these beauties! The anticipation of seeing what gorgeous double blooms you'll get is half the fun! Thanks for sharing your incredible results with us! Keep on growing 🌻️
- Linda L.Verified BuyerRated 5 out of 5 stars4/22/26Beautiful Dahlias
My dahlia seeds all germinated! I believe the key is warmth & light. I placed my tray (18) after germination atop our pellet stove with a towel underneath the tray with light from the room! Just beautiful, cannot wait until they flower. In the evening I would place them back in my seed room on a heat mat. Repeated daily with a spritz in the evening. I've only lost 2 (my fault). So excited to place them in the greenhouse around May 15th & then the gardens by Memorial weekend!💖
BIBotanical Interests5/3/26Hey Linda,
We're absolutely thrilled to hear all your Decorative Double Blend Dahlia seeds germinated! Your setup with the pellet stove and heat mat sounds like the perfect combination! It sounds like you've got the warmth and light balance figured out perfectly, and that daily routine with the evening spritzing is spot on. Losing only 2 out of 18 is fantastic success! We're so excited for you to see those gorgeous double blooms when they start flowering! Keep on growing 🌻️
- Cathy S.Verified BuyerRated 5 out of 5 stars3/27/26Excellent germination!
I haven't planted these outside as of yet.
I've started some indoors and every one of them germinated and they're growing well!
Which best describes you as a gardener? IntermediateBIBotanical Interests3/31/26Hey Cathy,
We're so excited to hear about your excellent germination rate with your Decorative Double Blend Dahlia Seeds! It sounds like you've got a fantastic start going indoors - there's nothing quite like seeing every single seed come to life! Once you get them transplanted outside, you're going to be absolutely amazed by the stunning double blooms these dahlias will produce. The variety in this blend is going to give you such a beautiful display! Keep on growing 🌻️
- Addison y.Verified BuyerRated 5 out of 5 stars3/12/26Amazing seeds
These were so easy to start, amazing germination and they have been so easy to tend to. They are lush and doing so well. Highly recommend starting dahlias from seed. Way lower cost than tubers and an early kick off to my short growing season.
Which best describes you as a gardener? IntermediateBIBotanical Interests3/15/26Hey Addison,
What a great experience with our Decorative Double Blend Dahlia Seeds! We're so excited to hear about your fantastic germination success and how lush your plants are looking. Your dahlias are going to be absolutely stunning when those double blooms start showing off! Keep on growing 🌻️