Quick answer: Seaside alder (Alnus maritima) is native to 3 states. What's commonly sold under this name is the true wild species. No live listing of the true species was found as of 16 Sep 2026.
Photo: Robert H. Mohlenbrock. USDA NRCS., Wikimedia Commons (PD)
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 | Part Shade |
|---|---|
| Water | High |
| Soil | Wet, streambank/pond-edge, acidic |
| Bloom | Jul-Aug |
| Height | Up to 33 ft |
| Wildlife value | Not recorded in the wildflower.org profile |
Buying it
No live listing of the true wild species was found as of 16 Sep 2026 — that means our last search didn't surface one, not that the plant is unavailable.
No live seed or plant listing found as of 16 Sep 2026. That means our last search didn't surface one — not that the plant is unavailable. Try a regional native-plant nursery.
Quick answers about Seaside alder
Where is Seaside alder native?
Seaside alder (Alnus maritima) is native to Delaware, Maryland and Oklahoma. Check your state's page in this directory for the full list of plants native where you live.
When does Seaside alder bloom?
Seaside alder blooms Jul-Aug. Exact timing shifts a few weeks with latitude and elevation.
What growing conditions does Seaside alder need?
Light: Part Shade. Water: High. Soil: Wet, streambank/pond-edge, acidic. Mature height: Up to 33 ft.
Is Seaside alder deer-resistant or drought-tolerant?
Seaside alder is tolerates shade and handles wet soil.
Where can I buy Seaside alder?
We haven't found an online listing of the true wild species as of 16 Sep 2026. A regional native-plant nursery or native seed company is your best source; ask for Alnus maritima by its scientific name.
Similar native plants
Native plants that share growing conditions or range with Seaside alder.
- Water oak Quercus nigra
- Black willow Salix nigra
- Atlantic white cedar Chamaecyparis thyoides
- Pin oak Quercus palustris
- American holly Ilex opaca
- Common hoptree Ptelea trifoliata
Also listed under
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