Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Asteraceae
Native
Mexico
Life Cycle
Annual
Plant Height
Tall (Greater than 24")
Flower Color
Purple
Bloom Season
Continual bloom from early/midsummer until first fall frost. Each flower lasts a week or more before fading.
Further Information
Plant Characteristics
- Attracts Pollinators
- Cut Flower
- Edible Flower
- Good for Containers
Growing Conditions
Heat Tolerant
Plant Resistance
- Deer Resistant
- Powdery Mildew Resistant
About Giant Purple Zinnia Seeds
Zinnia elegans
4"–6" purple blooms
Planting Zinnia
Plant Spacing
A group of 3 seeds every 12"
Light Required
Full sun
Plant Height
Tall (Greater than 24")
Planting Depth
¼"
Planting Details
| Seed Depth | ¼" |
|---|---|
| Seed Spacing | A group of 3 seeds every 12" |
| Thinning | When 2" tall, thin to 1 every 12" |
| Germination | 3–10 Days |
| Start Indoors | 4 to 6 weeks before your average last frost date. Transplant outdoors after last frost. Zinnias do not benefit from being planted early; wait for warmer weather. |
| Direct Sow | RECOMMENDED. 1 to 2 weeks after your average last frost date. |
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
Slide 1 selected
Search
Rating
Which best describes you as a gardener?
29 reviews
- Courtney D.Verified BuyerRated 5 out of 5 stars8/23/26My new favorite!
I LOVE these. Such large beautiful blooms. Huge, full double blooms. Some had ombré colors and some were just a rich purple throughout. Germination was great and large hardy plants. Cut and come again. Will be buying again even though I’m also saving seeds. I always want these in my garden!
Which best describes you as a gardener? BeginnerBIBotanical Interests8/29/26Hey Courtney,
We're so stoked to hear that your Giant Purple Zinnias have become your new favorite! It's awesome that you're getting those huge, full double blooms with such gorgeous colors - those ombré effects sound absolutely stunning. And we love that they germinated so well and gave you such large hardy plants that keep producing with that cut and come again style. That's exactly what we love to see! Thanks so much for being part of the growing community and for saving seeds too - that's awesome! Keep on growing 🌻
- Lisa W.NC, United StatesVerified BuyerRated 5 out of 5 stars8/20/26Beautiful!
Gorgeous deep bright pink, large blooms and very vigorous! Definitely ordering more seeds! Zone 8 NC
Which best describes you as a gardener? IntermediateWho do you grow for? YourselfHow do you prefer to grow? ContainerBIBotanical Interests8/22/26Hey Lisa,
We're so stoked to hear that your Giant Purple Zinnias are absolutely gorgeous with those deep bright pink blooms! It's awesome that they're growing so vigorous and giving you those large flowers you're loving. Zone 8 NC sounds like a perfect spot for them! Thanks so much for being part of the growing community! Keep on growing 🌻
- Nancy S.Verified BuyerRated 5 out of 5 stars6/2/26Gorgeous big flowers
These are my husband’s favorite. I grow these exact Giant Purple seeds every year. They are the most striking zinnias.
I start them inside and then plant seedlings. I sow many more than I need because I always lose some babies.
Botanical Interests has sold out of these seeds many times, so buy them early.
BIBotanical Interests6/3/26Hey Nancy,
What a wonderful tradition you have growing our Giant Purple Zinnia Seeds every year! We love that they're your husband's favorite and that you find them so striking. Your smart approach of starting extra seedlings indoors is such great gardening wisdom - you're absolutely prepared for success! Thanks for the heads up about buying early too, and for sharing your Giant Purple zinnia growing success with us! Keep on growing 🌻️
- Rosie A.Verified BuyerRated 5 out of 5 stars4/24/26Beautiful
No flowers yet but big stalks 😁
Which best describes you as a gardener? ProfessionalBIBotanical Interests5/6/26Hey Rosie,
That strong growth is such a fantastic sign that you're going to have some absolutely gorgeous Giant Purple Zinnia blooms coming your way soon! There's nothing quite like watching those sturdy stems get ready to show off those beautiful giant purple flowers! Thanks for sharing your growing progress with us - we can't wait for you to see those stunning zinnias in full bloom! Keep on growing 🌻️
- Laurie K.WA, United StatesVerified BuyerRated 5 out of 5 stars9/20/25Oh so fun!
LOTS of lovely flowers. Keeps blooming which keeps me happy!! Will plant these every year
from now on!!🌸🌺🌼
Which best describes you as a gardener? IntermediateWho do you grow for? YourselfHow do you prefer to grow? Raised Bed