Sow Mexican buckeye from fresh seed in warm, moist mix, in a deep pot that can hold the first long root.
Sow fresh seed in warm soil, in a deep pot
| Factor | Recommended | Avoid |
|---|---|---|
| When | August through October, when the capsules turn reddish brown and begin to split | Do not sow green, unripe seed, and do not store seed for years |
| Seed | Shiny, dark, hard seed sown fresh | Do not nick the coat as a required step; untreated fresh seed germinates in warm soil |
| Mix | A draining mix in a deep pot, kept evenly moist and warm | Do not let the mix dry out, and do not sit the pot in a saucer of water |
| Depth | About one inch of mix over the seed | Do not bury it several inches deep |
Mexican buckeye starts easily from fresh seed. Gather the capsules when they turn dark reddish brown and begin to open, then take out the shiny dark seed and sow it in warm soil. [1] Untreated seed often sprouts in about three weeks if the mix stays moist and warm. Use a deep pot so the first long root has room, or sow where the plant will live. [2] Ripe brown seed is the lot that grows; green seed makes weak seedlings. [3]
- Collect capsules from August through October as they split. Keep only hard, shiny dark seed.
- Air-dry the seed a few days. Sow soon. A short room-temperature hold is fine; long storage loses vigor.
- Fill a deep pot with a mix that drains. Sow about one inch deep. [4]
- Water so the mix is moist, not flooded. Keep it warm and do not let it dry until the seedling is up.
- Give the seedling bright light. Move it to the garden in spring after it has a real root system. Set it as on Planting Mexican Buckeye.
Can I start Mexican buckeye from seed?
Yes. Sow fresh, ripe seed about one inch deep in warm, moist mix in a deep pot. It often sprouts in about three weeks.
Cuttings can root — seed is the home start
Home gardeners start this plant from seed. Softwood cuttings are a nursery method, not the reliable home start. If a stem does root, it still wants the same drained mix and bright light, then the same ground plant-out as a seedling.
An established plant also sprouts from the crown if you cut it to the ground. That coppice growth is a reset of an old shrub, not a way to make new plants in pots. For a new plant, sow the seed.
Do cuttings of Mexican buckeye root?
Sometimes, on soft young wood, but seed is the start that works at home. Sow fresh seed in a deep pot instead of waiting on a cutting.
If the pot dries out before the seed sprouts, start a fresh lot and keep the mix moist through those first weeks.
FAQ
Can I collect my own seed?
Yes, from capsules that have turned reddish brown and begun to split. Take shiny dark seed, not green seed, and sow it soon.
Related guides
Recommended plants
References
- [1] Lady Bird Johnson Wildflower Center -
https://www.wildflower.org/plants/result.php?id_plant=unsp - [2] Garden Oracle -
https://gardenoracle.com/images/ungnadia-speciosa.html - [3] U.S. Forest Service -
https://research.fs.usda.gov/feis/species-reviews/ungspe - [4] City of Austin -
https://www.austintexas.gov/climate/nature-city-austin-blog/discover-marvels-mexican-buckeye-tree
This note is part of Ungnadia Guides.
More notes on making another plant live in Propagating Guides.
Updated: Reviewed by Bosquelle Editors