Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Apocynaceae
Native
Brazil and Uruguay
Life Cycle
Annual
Plant Height
Tall (Greater than 24")
Flower Color
Blue
Bloom Season
Summer
Further Information
Plant Characteristics
- Attracts Pollinators
- Cut Flower
Plant Resistance
Deer Resistant
About Tweedia Milkweed/Butterfly Flower Seeds
Oxypetalum coeruleum
Aquamarine flowers approximately ½"–1" wide which fade to purple as they age
Planting Milkweed
Plant Spacing
A group of 2 to 3 seeds every 12" – 24"
Hardiness Zones
10, 11
Light Required
Full Sun to Part Shade
Plant Height
Tall (Greater than 24")
Planting Depth
¼"
Planting Details
| Seed Depth | ¼" |
|---|---|
| Seed Spacing | A group of 2 to 3 seeds every 12" – 24" |
| Thinning | When seedlings have 3 sets of leaves, thin to one every 12" – 24" |
| Germination | 21 – 28 Days |
| Start Indoors | 6 to 8 weeks before your average last frost date. |
| Direct Sow | 2 to 4 weeks before your average last frost date. Mild Climates: Fall for spring germination. |
| Special Sowing | Light aids germination; press seed into soil surface. |
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: 6 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 2 Total 1 star reviews: 0
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Rating
Which best describes you as a gardener?
9 reviews
- Kathy C.VA, United StatesVerified ReviewerRated 5 out of 5 stars1/16/26Beautiful milkweed
However, I live in Virginia and I've never had butterflies hover over it or lay their eggs on it. But I keep it because the color is beautiful and eye-catching.
Which best describes you as a gardener? IntermediateWho do you grow for? YourselfHow do you prefer to grow? In Ground - Staci B.Verified BuyerRated 5 out of 5 stars11/20/25Difficult to find these seeds
I love these flowers, so beautiful and delicate have bought them as plants in the past. Was happy to find seeds for them.
Which best describes you as a gardener? IntermediateBIBotanical Interests11/24/25Hey Staci,
Thank you so much for taking the time to share your experience with our Tweedia Milkweed/Butterfly Flower Seeds! We totally get how exciting it is to find seeds for those hard-to-find varieties - especially when you've fallen in love with them as plants before. We're so glad we could help you add these beauties to your seed collection so you can grow them yourself. Thanks for sharing your excitement with us. Keep on growing 🌻️
- Leslie O.Verified BuyerRated 4 out of 5 stars9/1/25Tweedia seeds look like Common Milkweed
I ordered a packet of Tweedia seeds and planted them this spring. They've grown lots of foliage so far this year, but no flowers yet. A Monarch Butterfly visited them this morning. And the leaves look like Common Milkweed plants? I'm going to try to transplant them to my new flower garden for next season and see how they do. Hoping to see more Monarchs!
Which best describes you as a gardener? BeginnerBIBotanical Interests9/9/25Hey Leslie,
Thank you so much for taking the time to share your experience. The leaves in the photo do have the wrong shape of leaves for Tweedia milkweed - but those leaves also don't look like other milkweeds; they look a bit like goldenrod (Solidago spp.) There's also a slight chance that it's ironweed (Vernonia fasciculata) - that's a native plant to the central US that has started spreading eastward but isn't found in the west.
If it's goldenrod, it's likely wild in your area and it should bloom soon with yellow flowers - while they usually start blooming in late August, it's still just barely into early September so there's still a chance. Thanks for being patient with them and for creating habitat for our precious pollinators.I've reached out to you via email to offer assistance. Your feedback is invaluable to us, and we are committed to ensuring your experience is positive. Thank you once again for your input. Keep on growing 🌻️
- RobertRated 5 out of 5 stars6/18/245 Stars
Good seed inventory and selection. Very useful tips/ information in packaging. Seeds are good to go. I recommend them
- Zachary B.Verified BuyerRated 2 out of 5 stars5/9/242 Stars
I had such a low germination rate on the seats. It was pretty disappointing, considering I’ve grown them in the past, and had no other problems with other types of milkweed. The price for only 15 seeds and only two seeds that germinated left me pretty disappointed. Love the company and the packaging, but this was, a drag .
Which best describes you as a gardener? Expert