For A Quick Green Manure, Try Buckwheat

Fields of buckwheat used to be a common sight in America in colonial times, especially in northern areas. But in the modern era it has fallen out of favor as food for humans or livestock, with corn, soybeans and wheat occupying much of the space in farmers fields these days. But buckwheat still has a place in home gardens and on small farms as a fast growing cover crop, or ‘green’ manure. And for beekeepers like me, it also does double duty as a honey crop.

honeybees visiting buckwheat flowers (click on any image to enlarge)

Buckwheat is a warm-season cover crop that goes from seed to bloom in just 30-45 days, depending on the weather and the variety planted. That makes it great for any garden areas that might go empty in summer or early fall. I had two such areas in my garden this year. One was a bed where potatoes were grown and the other had a spring planting of brassicas (cabbage family) in it. Both areas are going to be planted with garlic later this fall, which I usually get in the ground in mid to late November.  So they were prime candidates for buckwheat. The flowers in the above photo are on buckwheat that was sown just 30 days ago.

bed with buckwheat growing

I do have another ulterior motive for planting the buckwheat. You see, honeybees and other pollinators just love it! Buckwheat makes a great honey crop, though the resulting honey is dark and has a strong, distinctive flavor. Around here, most of the fall honey is dark anyway, when things like goldenrod and other fall wildflowers are the main nectar sources. A little bed of buckwheat won’t provide that much nectar for our bees, but every little bit helps. I am hoping to get at least a bit more honey from the hive this fall before cold weather arrives and things stop blooming. And I actually like the dark, stronger flavored fall honeys.

buckwheat seed

Buckwheat rapidly grows to around 24 to 36 inches tall, providing lots of succulent green growth to eventually turn back into the soil. You can often find seed in garden centers, or you can get some from a health food store if you only need a small amount. If you go the latter route make sure you get whole seeds or groats suitable for sprouting, and not toasted or otherwise processed seeds. Germination is quick, usually in 2-3 days. The groats in the below photo have a lot of damaged grains, but they will still sprout and grow.

buckwheat groats

I’ll use a fork to turn the buckwheat into the soil about two week before I’m ready to plant the garlic. I might be doing it sooner if we get a forecast for freezing weather or a hard frost, because buckwheat isn’t the least bit winter hardy. And unless you want volunteer buckwheat plants, it needs to be turned in before the seeds mature. I’ll probably use my small Mantis tiller to chop it up in the soil, unless I feel like doing it by hand. Either way, the buckwheat will smother out weeds and keep them from taking over while the beds are waiting for garlic planting time. And when turned under it will add organic material to the soil, and provide a bit of nitrogen as it breaks down.

skipper butterfly on buckwheat flowers

The buckwheat itself will remove some nutrients from the soil while it’s growing, so I worked in a nice layer of compost and some organic fertilizer before sowing the buckwheat and raking it in lightly. I’ll also add a bit more compost to the silty soil before planting the garlic, since it is a heavy feeder and will be occupying the space for about 8 months or so.

If you have a bare spot in the garden that’s going to be idle for at least 45-60 days, you might try growing a cover crop of buckwheat there. Buckwheat is a magnet for all kinds of beneficial insects, so you’ll be doing them and your garden a favor in the process!

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8 Responses to For A Quick Green Manure, Try Buckwheat

  1. Jenny says:

    We also used to grow buckwheat back in europe – but not just for polinators or improving soil – it was one of the staples on our table. It taste a bit nutty and strong for first time users but it’s great with stews or soup. We used to toast it lightly and then cook like you would resotto until it’s soft and falls apart. Any time we’d make hearty winter meat sauce we’d make it with buckwheat.

  2. Daphne says:

    I’ve always used mixed cover crops. My favorite are oats and vetch, but this year I have peas in the mix too. I’ve never tried buckwheat.

    • Dave says:

      I’ve used all three of those, plus lately I’ve used oilseed radish too. I don’t usually have a lot of space available for cover crops, so it’s nice to be able to use something quick growing like buckwheat when I have the chance.

  3. peggi says:

    I grew buckwheat this summer in the area that I had grown garlic. The area was hard to reach because of the plants around it so I put in the buckwheat. It made the bees happy! I was going to use it for mulch but when it was time to cut it I couldn’t reach it so I left it. I am sure I will have buckwheat sprouting everywhere next year.

    • Dave says:

      I’ve let it go to seed before too. At least the buckwheat isn’t really that bad to control.

  4. Would buckwheat work well as a first crop in new garden space? Your blog is great. What books or websites do you recommend for gardeners who are just beginning to learn about keeping bees, and want to do lots of homework before becoming beekeepers?

    • Dave says:

      Buckwheat would work great as a cover crop for a new garden area. So would oats and vetch like Daphne mentioned. I get a lot of good beekeeping information from Michael Bush’s website The Practical Beekeeper. He has lots of articles about keeping bees without chemicals, which is what I am trying to do. He has published his articles in book form if you want to go that route. Beekeeper Linda also has a wealth of information on her website.

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