Buckwheat

Summer cover crop option

Fagopyrum esculentum (inferred from species, not stated in the guide)

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Is not a cereal but a speedy short season summer cover crop option with a dense root system providing a good soil conditioner before the next autumn crop. Cover crops suppress weeds and attract beneficial insects and pollinators with their abundant blossoms. Good companion to add to a cover crop mix.

Key attributes

  • Speedy short season summer cover crop
  • Dense root system conditions the soil
  • Suppresses weeds
  • Attracts bees and beneficial insects
  • Good companion in a cover crop mix

About this variety

Buckwheat is not a cereal. It is a broadleaf plant whose seed is used much as a grain would be, which is why it is often called a pseudocereal, and in a farming system here it is grown for what it does to a paddock rather than for what comes off it.

Its defining trait is speed. Buckwheat sets seed faster than any other grain crop, which is why it has traditionally been grown where summers are short, and why it fits a window too tight for anything else.

In a cover cropping programme that speed does the work. A stand closes over fast and is regarded as one of the best options for smothering mid-summer weeds, not because individual plants compete hard, but because the canopy shuts out light early. Below ground a dense, fine root system opens up and conditions the topsoil ahead of the next autumn sowing.

Buckwheat also appears to be unusually good at making soil phosphorus available, releasing it as the residue breaks down. It responds poorly to superphosphate but well to rock phosphate.

The flowers are the other reason it earns a place, blossoming heavily over several weeks and drawing bees and beneficial insects in numbers. It is a warm season summer annual, most often used as one component of a multi-species cover crop mix.

How it's sold

FormPackStatus
Bare25 kgIn stock
Buckwheat

FAQs

What's a quick summer cover crop I can get in and out before sowing my autumn crop?

We recommend Buckwheat, a speedy, short-season summer cover crop. Its dense root system conditions the soil ahead of the next autumn crop. It also suppresses weeds and flowers heavily, which attracts pollinators and beneficial insects. It suits sandy to loam soils in areas with 550mm+ rainfall or irrigation, and we suggest sowing it at 50 kg/ha.

Is Buckwheat a cereal?

No, Buckwheat is not a cereal, even though its seed is used like a grain. It is a broadleaf plant, so it works as a break from cereals and grasses in a rotation. We sell it as a short-season summer cover crop that conditions the soil with its dense roots, suppresses weeds and attracts pollinators with its abundant flowers.

I want something that flowers in summer to bring bees and beneficial insects onto the farm, any suggestions?

Buckwheat is one of the best options we stock for this. It produces masses of blossom quickly, which attracts pollinators and beneficial insects. It also suppresses weeds and conditions the soil with its dense root system. It suits sandy to loam soils with 550mm+ rainfall or summer irrigation. Sow it at 50 kg/ha into warm soil after the frost risk has passed.

How much Buckwheat seed do I need per hectare?

We recommend sowing Buckwheat at 50 kg/ha when it is sown on its own. Use a lower rate when it is part of a cover crop mix. Sow into warm, moist soil once the frost risk has passed, because Buckwheat is frost tender. It suits sandy to loam soils and needs 550mm+ rainfall or irrigation to perform over summer.

What can I add to a summer cover crop mix to help with weeds and soil health?

We recommend adding Buckwheat to a summer cover crop mix. It establishes fast, shades out weeds, and its dense root system conditions the soil. Its flowers also attract pollinators. It works well with summer legumes such as our Buff or Ebony Cowpeas and with Shirohie Millet. Our Cover Crop Plus Summer mix is another ready-made option.

Will a summer cover crop grow on our dry wheatbelt sandplain without irrigation?

Buckwheat is not suited to dryland summers in the wheatbelt, because it needs 550mm+ rainfall or irrigation to grow well. It suits sandy to loam soils where summer moisture is reliable, such as irrigated blocks in the South West. For dry country, talk to us about hardier summer options such as our Shirohie Millet or cowpeas.

How long does a short season summer cover crop take before I can terminate it?

Buckwheat is one of the quickest summer cover crops we stock, so it fits the short window before autumn sowing. Terminate it at or soon after flowering, before the seed matures. That prevents volunteers in your next crop while you still get the soil conditioning from its dense roots. It needs warm soil, 550mm+ rainfall or irrigation, and sandy to loam ground.

Can I feed a summer cover crop to sheep, or is it only for the soil?

We sell Buckwheat mainly as a cover crop and soil conditioner rather than a grazing crop. Buckwheat can cause photosensitisation in livestock, especially light-skinned stock grazing it in sunny conditions, so we advise caution. For summer grazing, we suggest our Shirohie Millet, Bounty Sorghum or cowpeas, and keeping Buckwheat for soil health and pollinators.

Buckwheat or cowpeas for a summer cover crop, what's the difference?

Buckwheat is a fast broadleaf that conditions soil, suppresses weeds and feeds pollinators, but it does not fix nitrogen. Our Buff and Ebony Cowpeas are summer legumes that add nitrogen to the soil and can also be grazed or cut for hay. Many growers sow the two together in a mix. Buckwheat needs 550mm+ rainfall or irrigation.

My sandy loam paddock crusts and has poor structure, what can I sow over summer to help?

We recommend Buckwheat as a summer soil conditioner for sandy to loam soils. Its dense, fibrous root system helps open up the topsoil and improve structure before your autumn crop, and its ground cover protects the surface. Sow at 50 kg/ha into warm, moist soil. It needs 550mm+ rainfall or irrigation to grow well through summer.