Plant buckwheat after the last frost, once the soil is warm. Cover the seed a half inch to an inch, and rake it in so it is not left bare on the surface.
Sow after frost, a half inch to an inch deep
| Factor | Recommended | Avoid |
|---|---|---|
| When | After the last frost, once the soil is warm — late spring into midsummer | Sowing into cold, wet ground, or in fall when a light frost will kill the stand |
| Depth | Cover the seed a half inch to an inch, then rake or press for soil contact | Burying the seed deeper than about an inch and a half |
| Spacing | Broadcast evenly and rake in, or sow one to two seeds per inch in rows about four to six inches apart | Wide gaps that let summer weeds fill the bed |
| Bed | A firm, drained seedbed that is already warm and not a puddle | A rough, cloddy disking with seed left on the surface |
Wait until frost is done and the soil is warm, then sow buckwheat where the plants will grow. [1] Cover the seed a half inch to an inch. Deeper than about an inch and a half leaves a thin, uneven stand. [2] Sun and watering after the plants are up are on How to Grow Buckwheat.
When do I plant buckwheat?
After the last frost, once the soil is warm. Cover the seed a half inch to an inch. Do not sow into cold, wet ground.
How to plant buckwheat
Sow after frost, cover the seed a half inch to an inch, and keep the seedbed moist until it sprouts.
- Clear weeds, then make a firm, drained bed. If you tilled in a previous crop, wait about a week for that debris to settle before you sow. [3]
- Sow after the last frost, once the soil is warm — often 55 F or warmer at the surface. Scatter seed evenly, or sow one to two seeds per inch in rows about four to six inches apart. [4]
- Cover the seed a half inch to an inch and rake or press so it has soil contact. Do not leave it bare on top, and do not bury it deeper than about an inch and a half.
- Water once to settle. Keep the seedbed moist until it sprouts, usually in three to five days in warm soil. Then follow How to Grow Buckwheat.
How deep do I plant buckwheat?
Cover the seed a half inch to an inch after frost. Deeper than about an inch and a half is the usual reason a row stays thin.
What fails at planting
Burying the seed deeper than about an inch and a half is the main reason a row stays thin. Do not sow into cold, wet soil, because the seed rots before it sprouts, and do not plant in fall when a light frost will kill the stand before it can cover the bed.
If the row stayed thin, sow a fresh bed after frost, a half inch to an inch deep, and rake the seed in.
FAQ
Should I start buckwheat indoors and transplant?
No. Sow outdoors where the plants will grow. The seed comes up in a few days in warm soil, and the fine roots do not like a move.
Can I grow buckwheat from cuttings?
No. Sow seed. A cutting is not a reliable way to start this annual.
Related guides
Recommended plants
References
- [1] Johnny's Selected Seeds -
https://www.johnnyseeds.com/growers-library/farm-seed-cover-crops/brassicas/buckwheat-key-growing-information.html - [2] Cornell Buckwheat Guide -
http://www.hort.cornell.edu/bjorkman/lab/buck/guide/sowinghow.php - [3] Oregon State University Extension -
https://ucanr.edu/sites/default/files/2020-08/333483.pdf - [4] University of Missouri Extension -
https://extension.missouri.edu/publications/g4163
This note is part of Fagopyrum Guides.
More planting notes by plant are gathered in Planting Guides.
Updated: Reviewed by Bosquelle Editors