Quick answer: Flame azalea (Rhododendron calendulaceum) is native to 14 states. What's commonly sold under this name is the true wild species. It's typically seeds, verified 16 Sep 2026.
Photo: W. Bulach, Wikimedia Commons (CC BY-SA 4.0)
Where it's native
Listed in the directory as native to these states. Click a state for its full native-plant guide.
Growing conditions
From the Lady Bird Johnson Wildflower Center Native Plant Database.
| Sun | Sun, Part Shade |
|---|---|
| Water | Medium (tolerates dry) |
| Soil | Well-drained, acidic, high organic matter |
| Bloom | May-Jun |
| Height | 6-12 ft (occasionally tree-like to 30 ft) |
| Wildlife value | Attracts birds, special value to bumble bees |
All plant parts highly toxic if ingested; symptoms: salivation, watering eyes/nose, abdominal pain, nausea, vomiting, diarrhea, weakness, difficult breathing, progressive paralysis, possible coma; honey from flowers may also be toxic
Buying it
Sold true to the wild species as of the last check (16 Sep 2026), via Amazon.
Sold as: Seeds via Amazon · listing verified 16 Sep 2026
See where to buy →Quick answers about Flame azalea
Where is Flame azalea native?
Flame azalea (Rhododendron calendulaceum) is native to 14 states across the Northeast, Midwest and South. Check your state's page in this directory for the full list of plants native where you live.
When does Flame azalea bloom?
Flame azalea blooms May-Jun. Exact timing shifts a few weeks with latitude and elevation.
What growing conditions does Flame azalea need?
Light: Sun, Part Shade. Water: Medium (tolerates dry). Soil: Well-drained, acidic, high organic matter. Mature height: 6-12 ft (occasionally tree-like to 30 ft).
Is Flame azalea good for pollinators and wildlife?
Yes. Wildlife value: Attracts birds, special value to bumble bees.
Is Flame azalea deer-resistant or drought-tolerant?
Flame azalea is drought-tolerant.
Is Flame azalea toxic?
All plant parts highly toxic if ingested; symptoms: salivation, watering eyes/nose, abdominal pain, nausea, vomiting, diarrhea, weakness, difficult breathing, progressive paralysis, possible coma; honey from flowers may also be toxic.
Where can I buy real Flame azalea seed or plants?
We found a listing sold as seeds that names the true species, last checked 16 Sep 2026. Look for the scientific name Rhododendron calendulaceum on any listing.
Similar native plants
Native plants that share growing conditions or range with Flame azalea.
- American mountain ash Sorbus americana
- Sweet birch Betula lenta
- Sassafras Sassafras albidum
- Mountain laurel Kalmia latifolia
- Black locust Robinia pseudoacacia
- Virgin's bower Clematis virginiana
Also listed under
Get the full buying guide
Every pick worth knowing across pollinators, shade, drought and more, in one PDF, with the tradeoffs spelled out. No spam, unsubscribe anytime.