Botanical Interests
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Product Details
Product Details
With long, sturdy stems, these bright, 4"–6" flowers are great for colorful, long-lasting bouquets. Zinnias are a customer favorite and so easy to grow from seed. Once they begin to bloom, they bloom and bloom endlessly until frost! 'Giant Purple' is heat tolerant and disease resistant. Zinnias are edible, but have little flavor. The colorful flowers can make a pretty garnish to salads, desserts, cold drinks, or serving trays. (The flower's central disk, while edible, can be bitter.)
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- Variety Info
- Sowing Info
Variety Info
Family: Asteraceae
Type: Zinnia (Learn more)
Native: Mexico
Hardiness: Annual
Exposure: Full sun
Bloom Period: Continual bloom from early/midsummer until first fall frost. Each flower lasts a week or more before fading.
Plant Dimensions: 40"–50" tall
Variety Info: 4"–6" purple blooms
Attributes: Attracts Pollinators, Cut Flower, Powdery Mildew Resistant, Deer Resistant, Edible Flower, Good for Containers, Heat Tolerant
Sowing Info
When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date.
When to Start Inside: 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.
Sprouts in: 3–10 Days
Plant Seeds (Depth): ¼"
Space Seeds: A group of 3 seeds every 12"
Thinning: When 2" tall, thin to 1 every 12"
- Nancy S.Verified BuyerRated 5 out of 5 starsJun 2, 2026Gorgeous 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.
EGEpic GardeningJun 3, 2026Hey 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 🌻️
- JennaRated 5 out of 5 starsJul 27, 2025Gorgeous Little Works of Art
This is my first year growing any flowers, I’ve been growing veg for a decade. I was worried it would be difficult, but these Zinnias were so easy! I started mine indoors because I’m Zone 4 and have a lot of birds trying to eat seeds I direct sew. Four seedlings turned into quite a few bushing plants with lots of flowers. Each one looks unique and the ultra violet purple color is out of this word. They are constantly covered in bees and butterflies.
Which best describes you as a gardener? IntermediateEGEpic GardeningJul 30, 2025Hey Jenna,
Thank you so much for sharing your experience! What beautiful photos of your Giant Purple Zinnias - what a perfect choice for your first flower growing adventure! It's wonderful to hear that starting them indoors worked so well for your Zone 4 garden. Your description of each flower being a unique work of art with that stunning ultra violet purple color just makes our hearts happy! And we love that they've become such a buzzing hub for bees and butterflies in your garden. Keep on growing 🌻️
- Christina S.Verified BuyerRated 5 out of 5 starsDec 28, 20245 Stars
The seeds that I have purchased from BI are my favorite seeds. This was my first year, trying flowers, and it felt almost full proof with these seeds. I bought a variety of zinnias and all of them turned out beautiful.
- Chase S.Rated 5 out of 5 starsJun 12, 20245 Stars
Great germ rate. Beautiful full and luscious flower with great royal and deep cosmic purples!
Which best describes you as a gardener? Intermediate - Rosie A.Verified BuyerRated 5 out of 5 starsApr 24, 2026Beautiful
No flowers yet but big stalks 😁
Which best describes you as a gardener? ProfessionalEGEpic GardeningMay 6, 2026Hey 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 🌻️
