Perennial buckwheat leaf vegetable Australia

I find myself fascinated with the concept of perennial grains.  While many appear to be inappropriate for large scale cropping, perhaps they could be useful for small scale or backyard production.  Or maybe they are not suited to small scale growing and will never be a decent crop.  I wish one of the permaculture institutes would put some decent effort into researching this.  

I grow a perennial corn, it is unsuited to my climate and frustratingly unproductive here, but I am told it is fast growing and very productive in warmer climates.  I know of a few other perennial grains, some sound promising, but I have no access to germplasm. 

I also grow a perennial buckwheat (Fagopyrum cymosum complex, sometimes called Fagopyrum dibotrys), this also goes by the common names "Golden Buckwheat" or "Tall Buckwheat".  I read that in the Himalayas it is referred to as Kathu (काठू).  I believe this plant is mostly used as a perennial leaf vegetable but it is also said to produce edible seed.  

Perennial buckwheat growing strong

Buckwheat seeds, either Fagopyrum esculentum or Fagopyrum tataricum, are commonly eaten in various dishes.  In various countries the leaves and flowers are also consumed as vegetables.  I have eaten leaves from common buckwheat, they tasted nice enough raw and pretty good when cooked.  When in flower they could be a little bitter raw, before flowering they weren’t bitter.  The bitterness they have when flowering seems to go away after being cooked. 

After some research it appears that leaves of common buckwheat, and tartary buckwheat, are eaten as vegetables, but it is far more common for leaves of perennial buckwheat to be eaten.  Presumably this is due, at least in part, to the rampant spreading of this perennial vegetable.  Perennial vegetables are great as you plant once and harvest forever.  

Golden buckwheat is simple to grow, it seems to prefer full sun, and copes reasonably well with partial shade.  

My plant has divided impressively in the time I have grown it.  Over winter it will die back and be dormant, and it should resume growth in spring.  These grow and divide fast, so I am expecting to have a lot of plants by this time next year.  

Roots developing at a node

Even though perennial buckwheat divides so readily in my climate, I tried to grow one by a cutting.  It worked well.  

I cut the top off one plant, removed the lower leaves, and put the stem in water.  It wilted badly the first day, then regained turgidity, then grew some roots from one of the nodes.  This seems like a good way to increase numbs if I don't want to wait for it to send out underground rhizomes. 

It is cold now and will likely not do a lot of anything above ground until spring.  I am guessing that it should grow roots and perhaps even send out rhizomes, but all of this will happen under ground.  Once the warm weather hits this should cause this plant to spread and grow into many plants.

Now I know I can grow them from stem cuttings if I want to.  This is good to know.  

Perennial buckwheat cutting growing roots

Frost is not an issue for perennial buckwheat as the top part mostly dies back and the underground rhizome is largely dormant while it waits for warmer weather before growing again.  I say 'mostly dormant' because the rhizome does spread a little over winter, but nowhere near as much as when the weather is warmer.

When going dormant in Autumn, the leaves change colour before they fall off, they are really quite pretty.  I didn't think to take photos when the plants were looking their best.  

Perhaps this is why it's called 'golden buckwheat'

I don't know how dry this can survive or how boggy it can survive.  So far I have treated it much like any vegetable and given it some water when the soil is dry, and it has done really well.  Next year when I have more plants to play with I may try to see what it can tolerate.  

I am not sure if it needs frosts and a dormant period to perform at its best.  If I were to guess I would say it would not need a dormant period, and in the subtropics it would actively grow and produce abundant vegetable greens all year.  

Perennial buckwheat

Perennial buckwheat looks similar to fish mint from a distance.  The flowers are very different and can be used to distinguish between them even at a distance.  Perennial buckwheat grows taller than fish mint.  When they are not in flower, I would want to smell them to reliably tell them apart.  

They both grow well and are very productive over the warmer months, and both are dormant over my winter.  

The autumn colours of perennial buckwheat are really impressive.  The leaves go a vibrant golden yellow, and they often have red veins, stems, and edges.  I believe the leaves are still edible by people even at this stage, and the leaves are gladly eaten by our chickens and guinea pigs when green or golden.  

Perennial buckwheat changing colour for autumn

I am told that perennial buckwheat aggressively spreads by underground rhizomes, and that it will take over the garden unless planted in pots.  

I don't think I would be too bothered if perennial buckwheat spread through my lawn because, unlike fish mint, the yard will not smell like fish every time I mow.  

Even so, I am keeping my perennial buckwheat contained for now.  Perhaps in the future I will let this thing out to see what it does.  

Perennial buckwheat - heart shaped leaf

The leaf of common buckwheat reputedly contains 24% protein, I assume that percentage is of dry weight as the fresh leaf would contain a lot of water.  As well as being high in high quality protein and amino acids, buckwheat leaves contain many vitamins, minerals, antioxidants, flavonoids (eg rutin, quercetin, orientin, isoorientin, vitexin, and isovitexin), fatty acids, polysaccharides, iminosugars, dietary fiber, fagopyrins, resistant starch, vitamins, and minerals.  I have read various papers on this that all state the nutrient profile of perennial buckwheat is rather impressive, and other papers that conclude that it may have several medicinal properties.  

Given how nutritious buckwheat leaves are, and how fast it spreads, I am tempted to grow it in the chicken run under some wire so the chickens can eat the leaves without killing the plants.  I have a feeling it may be well suited to producing abundant and nutritious greens for my hens over the warmer months.  I read a paper that stated replacing 10% bought feed with perennial buckwheat leaf in layer diets did not reduce the number of eggs laid.  

My chickens seem to like eating the leaves of perennial buckwheat.  I have also given some leaves to our guinea pigs, who greedily ate every last part of them even though they were on the lawn with free access to grasses and lawn weeds.  I have read about the leaves being fed to pigs, sheep, cattle, and rabbits, all of which gladly ate it. 

I have read that perennial buckwheat is used as silage or hay in some countries.  I would not use this as the only feed for any animal, but using it for a percentage of feed works well.  Perennial buckwheat seems to be one a crop that holds a lot of potential and could be improved with a little breeding effort.  

Perennial buckwheat, much like every other type of buckwheat, is excellent bee forage.  These plants produce a lot of nectar, ample pollen, and the bees and many other beneficial insects seem to adore the flowers.  

Perennial buckwheat in a pot

I have heard varying reports about the ability of F cymosum complex to set seed.  Some sources say it does not set seed, others say it sets abundant seed.  This may be partly due to genetic differences of different clones, or they may need a second clone in order to set seed, or it may also be weather dependent.  When I grow common buckwheat in hot weather I get zero seed set, when grown under cooler conditions I get plenty of seed set, perhaps perennial buckwheat is similar.  

Apparently the seed of perennial buckwheat is extremely high in protein, slightly above 16%.  I read another report that the seed contains 24% protein, but am not certain how reliable that site was.  Presumably there is some reason its seed is not seen for sale as often as common buckwheat or Tartary buckwheat.  Perhaps it is too small or difficult to dehull, perhaps it drops its seed in the field and is difficult to harvest, or perhaps it does not set seed reliably.  

I haven't grown this long enough to see if mine produces seed.  If it can't produce seed, I have a few ideas to try that may restore fertility.  If I can't restore its fertility then I will still grow it as a leaf vegetable, poultry forage, bee/pollinator forage, and ornamental cut flower.  

Potted up after breaking dormancy

Many vegetables contain at least some level of antinutrients, some are deactivated by heat, others less so.  Buckwheat seed appears to contain negligible amounts of a chemical known as fagopyrin, while buckwheat hulls, leaves, stems, and flowers all contain differing amounts of this chemical.  The amount changes depending if the plant is young or if it is flowering.  Eating too much fagopyrin can cause some sensitivity to sunlight.  

I wrote another blog post on buckwheat and fagopyrin, so I won’t cover that information here.  There has been little research into safe levels for human consumption, and seemingly contradictory advice surrounding if it is deactivated by heat.  

Consuming 150 grams of perennial buckwheat leaf raw every single day falls well within the safe limit, given the research into fagopyrin and steamed sprouts it is likely that triple this amount would be safe if cooked.  The data is limited so it may be that considerably more than this is safe.  

Given how many people consume significant amounts of buckwheat daily, and how few reports there are of adverse effects (most of which have been due to consuming sprouts in juiced form), it is likely safe to eat cooked leaves every day with no ill effects.  

I don't have any extra plants at the moment, but will eventually sell these plants through my for sale page.  For now I am building up numbers, and seeing what this plant can and can't do.  I almost find it difficult to believe just how easily this plant produces food for people and animals, yet how uncommonly it is grown outside of developing nations. 

I really like my perennial buckwheat.  This is a perennial vegetable that is seemingly forgotten or unknown outside of developing nations, and it is well suited to growing in backyards.  For reasons I cannot fathom it is very rare in Australia.  It has potential to increase household food security in a number of ways, as well as being very healthy and potentially having medicinal benefits.  If I were a 'prepper' or had to become more self sufficient, this perennial vegetable would be very high on my list of survival vegetables to grow.