There is no need to peel mashua, although some people cut off the rose (distal) end of the tuber because the texture can be a little more fibrous. Mashua is a tuber crop native to the Andes, where it was developed alongside the similar tuber crops potato, oca, and ulluco. I recommend saving the largest tubers for replanting. , Mashua (Tropaeolum tuberosum) is a perennial climbing plant from the Andes grown for its tuberous roots. Cardenas-Valencia (2008) reported on rats that were dosed with an extract prepared by first boiling and the freeze-drying the tubers. It has a habit of piling up tubers right at the surface and these will be ruined in a frost if they are not protected. Here are some of the best that I have found: According to this study, https://www.ncbi.nlm.nih.gov/pubmed/7057655 , “Experimental animals and controls showed equal capability in impregnating females, although animals fed T. tuberosum showed a 45% drop in their blood levels of testosterone/dihydrotestosterone.” This is the opposite of what you stated above. Fresh seed is favoured by many growers but dried seed is also often successful. It is an herbaceous climber, native to Chile. The nasturtiums received their common name because they produce an oil similar to that of watercress (Nasturtium officinale). Given a long enough frost free autumn, plenty of water, and an overall cool climate, mashua can produce very high yields. Unlike some of the other crops that were once quite vulnerable, such as yacon and maca, mashua has yet to find a niche in global markets, although it has recently been proposed as a possible new “superfood” (Williams 2016). After flowering, the plant dies back. This has only been studied in rats, so effects on humans are a matter of speculation. Unfortunately, these species are difficult to obtain. They are more pungent and contain more forms of glucosinolates than the domesticated mashua. Incredibly showy, Tropaeolum tricolor (Tricolor Nasturtium) is a summer-dormant, tuberous, perennial climber with a profusion of tricolor flowers from winter to early summer. Creating a spectacular floral display for months, they contrast nicely against the foliage of dainty, deep green, clover-like leaves. Cubio was the name used by the Muisca of the Colombian Andes (Torres 1992). One of the fabulous perennial plants of dry places in Chile, it dies down to deep resting tubers in winter which are best kept dry. Required fields are marked *. This crop is easy to grow in the maritime Pacific Northwest and challenging to grow in the rest of the country. It is an attractive plant and is probably better known as an ornamental than an edible outside of its native range. The plant grows best in full sun in mild climates. They found no difference in testosterone between the control and treatment groups. £9.85. Tuber crops are also prone to somatic mutations, so you can inadvertently select for varieties that produce smaller tubers by repeatedly planting the smallest. Genetically, mashua is generally considered to be tetraploid (Gibbs 1978) and displays a fair degree of phenotypic variability in progeny from self pollinated seeds, similar to that seen in tetraploid potatoes (example here). Mashua has long twining stems on which three to five lobed leaves form. The flowers are bisexual and showy, set singly on long stalks in the axils of the leaves. Without special attention, fully cooked mashua tastes basically like turnip; not bad, but not terribly exciting. there is one exception: the variety Ken Aslet begins forming tubers in mid summer and can produce a reasonably good yield by the middle of October. Despatch Option: . New varieties should be trialled in warmer climates.No discussion of mashua breeding objectives would be complete without considerations of flavor. * Mashua varieties have tested positive for the genus and these viruses are possible culprits, Mashua frequently demonstrates fasciation, which can be beautiful, but also typically lowers yield. This sought after plant creates a spectacular sight when grown through mature shrubs or scrambling over low walls. These were low titer results on test strips, which might indicate that they are related viruses and not actually those viruses, but I have included them in the table below until that is sorted out. Evidence exists for ancient use of mashua, as much as 8000 years ago, probably with later domestication. piliferum. The reason suggested in the paper is that the isothiocyanates in mashua were acting as a starvation factor, which in turn caused the drop in testosterone. Mashua tubers range widely in size, from about three inches to more than thirteen inches. I think that mashua has a greater gap between its potential and the current state of the crop than any of the other Andean tubers. In addition to those listed, T. brachyceras is said to have edible tubers, but I haven’t tried them.I have had no luck making crosses between mashua and common Tropaeolum species (which doesn’t mean that it can’t be done), but there is a cluster of close genetic relatives that might be worth trying, including T. cochabambae, T. smithii, T. argentinum, T. meyeri, T. wamingianum, and T. capillare. It is delicious roasted with meat and the fattier the meat, the better. You can lift them and store like dahlia tubers. This doesn’t matter for white varieties, but strongly colored varieties need to be left to mature as long as possible. Like clematis vines, these nasturtiums like having their feet in the shade and their heads in the sun, preferably in well-drained, neutral or mildly acidic soil with a trellis for … Most people will either boil or roast mashua until fork tender. It flowers relatively early in the year, usually beginning sometime in August and continuing until the frost. Tubers stored at room temperature will begin to sprout by March. You can much over the base of the plants to avoid this problem. Larger tubers generally produce bigger plants faster, with more stems, which leads to greater yield. It is important to note that flowering may not appear until the plants are grown from tubers. When they start to shoot place a growing frame above the pot. This is very similar to the behavior of tetraploid potatoes. The rare and fabulous blue climbing nasturtium has thin twining stems which produce many dazzling cobalt blue flowers from the leaf axils of delicate, attractively-lobed leaves. Information is not available over its entire range but, in Ecuador, loss of varieties amounting to 46.5% of its previously assessed genetic variability has occurred in recent decades (Tapia 2001). It was named by Carl Linnaeus in his book Species Plantarum, and is the only genus in the family Tropaeolaceae. Some varieties adopt a bush form while others scramble over and through other plants and are useful for planting in awkward spots or for covering fences and trellises.. However, since far more people grow mashua as an ornamental than as an edible, I would be remiss in skipping this subject entirely. The plant's round leaves reminded Linnaeus of shields, and its flowers of blood-stained helmets. , All parts of Tropaeolum majus are edible. Seed from the winter growing species should be sown in the autumn while the summer growing species are best sown in the spring in well-drained compost and covered with 1 to 2 cm (0.4 to 0.8 in) of grit or sand. They are fast growing in cool, wet weather and are generally able to out-compete and smother weeds. Tropaeolum Tropaeolum majus Scientific classification Kingdom: Plantae Clade: Tracheophytes Clade: Angiosperms Clade: Eudicots Clade: Rosids Order: Brassicales Family: Tropaeolaceae Juss. Mashua can also be preserved by pickling or canning, using processing instructions for potatoes. It is a perennial with underground rhizomes which send up new shoots at intervals. As mentioned, mashua pickles are delicious and the adventurous fermenter could probably produce a very unique product. Mashua seeds have slow and irregular germination. At the end of 42 days, they found slight reduction in sperm count and daily sperm production in the rats that ate mashua. The genus Tropaeolum was diagnosed only by the absence of the characteristics of the other two genera. Bears will dig up your mashua and eat every bit of it that they can find.  The cultivar T. tuberosum lineamaculatum 'Ken Aslet' has gained the Royal Horticultural Society's Award of Garden Merit. Mashua contains large amounts of glucosinolates (mustard oils) and, as a consequence, isothiocyanates. They typically ignore them until late in the season, when mashua is one of the few plants left in the ground and they are never enthusiastic about digging them up. It is in flower from June to October, and the seeds ripen from June to October. Another common defect is flowers with dual nectary spurs. Variable supply we hope to have stock in late spring. A molecular study undertaken in 2000 found Tropaeolum to be paraphyletic when the other two genera are segregated, so Magallana and Trophaeastrum were reduced to synonyms of Tropaeolum. Variety: Speciosum. Mashua is probably vulnerable to at least some of the pathogens that infect the garden nasturtium (T. majus), which makes it likely that it could contract novel diseases outside its native region. The crop is propagated by planting tubers. Leaves are tasty as a salad green, with a bit of mustard-like spiciness, and the larger leaves can be used as a wrap, like grape leaves. Walp. The cercozoan Spongospora subterranea, which is responsible for the condition known as powdery scab in potatoes also affects mashua (Torres 1992). This encourages a bushier seedling that will be less vulnerable to damage when planted out. Color develops late in mashua. Basic preparation is similar to that for potatoes. They will also turn green from exposure to the sun, which does not affect edibility, but can look less appealing. It comes in a range of forms and colours including cream, yellow, orange and red, solid in colour or striped and often with a dark blotch at the base of the petals. It originated from Peru but may first have been cultivated in the Canary Islands before being introduced into Western Europe. Evaluation of USDA Andean Potato Accessions, Mashua seeds undergo hypogeal germination, The seed, since it is produced by heterozygous plants, will not be true to type, The size of mashua seeds is correlated with germinability: bigger is better, positive results for Potato Virus S and Potato Virus Y in mashua, https://www.ncbi.nlm.nih.gov/pubmed/7057655, A Change to Our International Shipping Policy (Again), Crossing Between Solanum maglia and Domesticated Diploid Potatoes (Part 2), Potato Viruses in Certified and Non-certified Tubers, Crossing Between Solanum maglia and Domesticated Diploid Potatoes (Part 1), The Practicality of Diploid Potatoes in North America, Potato Onion (Allium cepa var. You have some amazing information here. I hope to try to narrow that down in the near future, but it is more important to me to eliminate viruses than to identify them. A couple of deer can destroy a large planting of mashua overnight. The tubers start growing towards the end of the autumn. Likewise, most Andean root crops prefer moderately acidic soils, although mashua appears to have a wide range of soil tolerance. Cumin seems to have an almost magical balancing effect against its less appealing flavors. The other common problem pest is field mice (voles), which will dig and eat the shallow tubers. Tropaeolum speciosum Posted on December 30, 2014 by stephenryan in Climbing plants, Collector Plants, Edible, herbaceous climbers, Perennials. So eventually seed came my way and up they came. I have an irrational love of the Genus and in my collection so far I have T.Azureum (blue and hard to keep), T. … Order Code: 47-06. Mashua will grow well in most of the Pacific Northwest, particularly the Puget sound region, the coast, the San Juans, the Gulf Islands, and southern Vancouver Island. The variety ‘Hahamish’ has orange petals and generally flowers beginning in August, so it can be a good companion for ‘Ken Aslet’ if you want some contrast. Most other mashua varieties are short day flowerers and don’t begin until October/November, so they are only suitable for ornamental use in climates that are frost-free or nearly so. It is mostly grown from seed as a half-hardy annual and both single and double varieties are available. Tropaeolum speciosum from Thompson & Morgan - experts in the garden since 1855. The variety ‘Puca-añu’ has red petals, so the flowers have very little contrast and appear solid red. aggregatum), Potato: What You Should Know About Potato Fruits, Potato Ploidy and Endosperm Balance Number, Top 10 Beginner Mistakes with True Potato Seeds (TPS), USDA Zones for Andean Root and Tuber Crops, Book Review: Pandora’s Potatoes – The Worst GMOs, Jerusalem Artichoke (Helianthus tuberosus) and Relatives, Yacon (Smallanthus sonchifolius) and Relatives. Be careful digging out the seedlings, because the roots can be several inches long by the time the first shoot breaks the surface. SYNONYM(S) : Chymocarpus speciosus (Poepp. Plant mashua in the spring after risk of frost has passed. , "The Plant List", a collaboration between the Missouri Botanical Garden and the Royal Botanic Gardens, Kew includes the following accepted names of Tropaeolum species names. Root stem cuttings with bottom heat in late summer. You can cut tubers for more plants, much as you would seed potatoes. Either one of these might be more acceptable given the absence of the other. Although not a traditional method of preparation, I think that it makes a pretty tasty pickle. Plant seeds about an inch deep. Having tried this, I only recommend it to the adventurous. I am pretty much focused on growing plants as food and their appearance is a secondary consideration. Tuberous Tropaeolum species are well known for occasionally remaining dormant for one or more years. Mashua is one of the least studied of the Andean root and tuber crops. Mashua was introduced to Europe as early as 1827 (Hind 2010) and appears to have been grown continuously since then, but primarily on small scale as an ornamental. A rewarding plant and it almost comes as a surprise to learn that such an exotic specimen is hardy throughout the British … Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. The trait of greatest interest in my breeding work is day neutral flowering, which is known only from the cultivar ‘Ken Aslet’. I have grown many self-pollinated seedlings of this variety and also have made crosses with short day flowering varieties. The tubers are the most frequently consumed part. Menu OVER 3500 SEED VARIETIES SOLD! Seedlings will otherwise often grow one very long stem and can be set back severely if some critter snips it off. There is also some evidence for diploid and triploid forms. , In Germany, licensed physicians are allowed to prescribe the herbal antibiotic, Angocin Anti-Infekt N, made from only nasturtium and horseradish root. Breeding to reduce the pungency, likely associated with isothiocyanate content, might also reduce the content of substances implicated as anaphrodesiacs, which could increase consumer acceptance whether or not these substances actually exist in biologically significant concentrations. Most varieties have white to yellow tubers, although red and purple varieties also exist. In human terms, a 70 kg man would consume 70 g or 2.5 ounces of mashua. Genus: Tropaeolum L. Species About 80 species, see text. lineamaculatum 'Ken Aslett' available to buy mail order. They reach a maximum thickness of about half an inch (1 cm). If you find that they are becoming soft, either put them in some barely damp soil or in the crisper of your refrigerator. It is more common to eat mashua cooked, after which the flavor can range from strongly cabbagey and bitter to mild and sweet. Most Popular. Do not pull the full stem free of the tuber. Mashua (T. tuberosum) produces an edible underground tuber that is a major food source in parts of the Andes. The five petals are clawed, with the lower three unlike the upper two.