Also known as Blue Milkweed · 315 gardener saves
Tweedia: the varieties gardeners actually grow
Tweedia, the genus most gardeners know as blue milkweed. We track 3 varieties; these are the ones gardeners actually save and plant, ranked by real saves rather than catalog marketing. Each links to full care, bloom, and live price data.
The 3 most-saved Tweedia varieties
Of 3 in the catalog — ordered by how many gardeners actually grow them.
#1 most savedBlue Tweedia
Tweedia caerulea
#2 most savedHeaven Born Blue Milkweed
Tweedia caerulea 'Heaven Born'
Tweedia
Tweedia solanoides
How to grow Tweedia
What the Tweedia varieties in our catalog actually agree on — drawn from the care records of the 3 most-grown of them, not from a generic template.
The Tweedia year
- PlantMarch67% of varieties
Plant transplants or sow seeds after the danger of hard frost has passed
- DeadheadJune–August67% of varieties
Remove spent blooms or harvest flowers regularly to prolong flowering
- Winter PrepOctober and November67% of varieties
Apply a thick layer of mulch around the crown for winter root protection
- StakeMay67% of varieties
Provide a small trellis or stakes for support as stems begin to elongate.
Do
- Water regularly during dry periods 🌱
- Prune after flowering to shape the vine
- Use balanced fertilizer in spring
- Water consistently during dry spells 🌱
- Provide full sun for best flowering
Avoid
- Avoid overwatering to prevent root rot ❌
- Don’t let soil stay waterlogged
- Never prune in late fall
- Do not plant in heavy, waterlogged soils
What goes wrong with Tweedia
| Problem | What you'll see | What to do |
|---|---|---|
| Aphids | Sticky residue and distorted leaves | Spray with insecticidal soap |
| Root rot | Wilting and blackened roots | Improve drainage and reduce watering |
Making more Tweedia
Cuttings
- Take 4-inch cuttings in late spring.
- Dip in rooting hormone and plant in moist soil.
- Maintain humidity for 6 weeks until roots develop.
Seed
- Tuck seeds into moist soil in early spring.
- Keep soil consistently moist for germination (2-3 weeks).
Tweedia questions
How many types of Tweedia are there?
The Sow catalog tracks 3 distinct Tweedia varieties. The most popular — ranked by 315 real gardener saves — are shown first above.
What zones does Tweedia grow in?
Across its varieties, Tweedia covers USDA Zones 5–10. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Tweedia bloom?
Most Tweedia varieties bloom in late spring, summer to fall, mid-summer. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Tweedia should I choose?
Start from the most-saved varieties above — popularity across thousands of gardens is a strong signal of reliability — then filter by your zone and sun. In the Sow app you can preview any of them in a photo of your actual yard before you buy.
Keep exploring
Design with Tweedia in your own yard
Snap a photo of your space and see these varieties planted in it — sized correctly, matched to your zone, with care reminders included.
