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YaconSmallanthus sonchifoliusPeruvian Ground Apple, Bolivian Sunroot

Just £11.99

Tender Tuber
What is Tender Tuber?
Plant that grows from an underground storage organ. Generally supplied in a
dormant condition with no top growth. Susceptible to damage
or death at temperatures below 5C.

We are really sorry, but this product is no longer available.

Please note: This product cannot be delivered outside the United Kingdom.
Description How to Grow More Info Delivery

An unusual and delicious tuber, widely grown in South America for its crunchy texture and sweet pear-like flavour. Similar in appearance to a sweet potato but with the texture of water chestnuts, yacon makes a fabulous addition to stir fries and salads, or try tossing it in olive oil and roasting with other root vegetables. The juice from yacon tubers can also be simmered to make a sweet syrup similar to honey or maple syrup. Containing an indigestible sugar called Inulin, both the tubers and syrup are suitable for diabetics and yacon syrup is virtually calorie-free! Yacon makes a particularly attractive crop in the garden with bushy growth and large lush leaves which lend an exotic feel to borders or the vegetable plot. Height: 1.8m (6'). Spread: 100cm (39").

Useful links:

How to grow Yacon

Press release: Yacon makes sugar-free sweetener!

Kitchen Garden, Greenhouse, Conservatory, Exotic Garden


Full sun

Up to 180cm (70.9in)

Up to 100cm (39.4in)

A little experience

Easy for all

Thompson & Morgan strives to ensure that all its plants are delivered to you in the perfect condition for planting. Sadly, the time it takes to deliver to certain locations in the UK means that we can't guarantee this, so regretfully we are unable to ship live plants to the following areas: GY, HS, IV41-IV49, IV51, IV55-56, KW15-KW17, PA34, PA41-48, PA60-PA78, PA80, PH40-PH44, TR21-TR24, ZE1-ZE3.

Flowering Months Harvest Months

Water Yacon plants regularly, particularly during dry periods and especially from mid September when tubers begin to develop. An occasional feed with a general fertiliser and a mulch of well rotted compost will also help to encourage strong growth. Small yellow flowers may be produced in late summer and autumn but these can be left on the plant.

Harvest yacon when the foliage has become frosted and died back in late November and December. Carefully lift tubers taking care not to bruise them. Yacon tubers bury themselves quite deeply in the soil, forming a cluster similar to a dahlia. Once lifted, carefully break away the tubers from the plant. Any damaged tubers should be used promptly or made into syrup as they will rot in storage. Yacon tubers can be stored for several months in paper or hessian sacks, in a cool frost-free shed. Stored tubers will form a thicker skin, which turns a dark brown colour. This skin will need peeling as it becomes bitter over time.

Gradually acclimatise yacon plants to outdoor conditions over a period of 7 to 10 days prior to planting outdoors once all risk of frost has passed. Grow yacon in any well drained soil in a sheltered position in full sun. Prior to planting, prepare the soil by adding plenty of well rotted manure or garden compost to improve its structure and fertility. For optimum tuber production plant yacon at a distance of 75cm (30") apart, and cover with fleece until fully established.


Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £1.95.

Orders which include any other products will incur a delivery charge of £4.95.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.90 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details and details of any surcharges that may apply to certain destinations.

Satisfaction Guaranteed

For your complete peace of mind, our Home and Garden products may be returned to us within 30 days of purchase for a refund of the purchase price. Items must be returned unused, at your cost and in mint condition. All items carry a manufacturer's 12 month defects warranty.