Growing Yacon, also Sunroot

Smallanthus sonchifolius : Asteraceae / the daisy family

Jan F M A M J J A S O N Dec
                    P P

(Best months for growing Yacon in New Zealand - cool/mountain regions)

  • P = Plant tubers
  • Easy to grow. Plant sprouting root/tuber to a depth of about 4cm and mulch to cover. Best planted at soil temperatures between 10°C and 25°C. (Show °F/in)
  • Space plants: 100 cm apart
  • Harvest in approximately 25 weeks. You can collect a few at a time without digging out the whole plant..
  • Compatible with (can grow beside): Best in separate bed
  • Yacon flowering

Yacon is perennial in sub-tropical/tropical areas. Save some root pieces and treat as an annual in other areas.

Grows into a large plant (about 2 m/6ft) with flowers similar to sunflowers and Jerusalem artichokes.

The plants die down after frost but the roots are sweeter. To store, dig and dry out for a couple of days in the sun if possible. Store in a dry, cool, not freezing and dark place.

Any roots left in the ground will grow the following year except where there are frosts.

Culinary hints - cooking and eating Yacon

The large roots can be used raw in salads peel and chop. Sprinkle with lemon juice to prevent browning.
"In the Andes, they are grated and squeezed through a cloth to yield a sweet refreshing drink. The juice can also be boiled down to produce a syrup. In South America the juice is concentrated to form dark brown blocks of sugar called chancaca." (Green Harvest)

Your comments and tips

15 Aug 24, Diane Davidson (New Zealand - temperate climate)
I'm fascinated by this Yacon plant - don't know if I'll be able to grow it as I only have a balcony garden at my apartment. I understand that they need quite a lot of space. But I'd like to try, if I can discover where zi could buy the roots for planting. Otherwise, perhaps there is somewhere that I could buy the fruits for eating. I'd like to experiment with different ways of cooking/eating them
08 Sep 24, Sharron (New Zealand - temperate climate)
What part of New Zealand are you living in? I have a yacon and might be able to give you a root
07 Jan 24, Di (New Zealand - temperate climate)
I have yacon if you'd like some tubers. I live in Tauranga.
10 Jan 24, Evan (New Zealand - temperate climate)
I would love some Yakon tubers Di, I am in Tauranga also
09 Jan 24, Bruce (New Zealand - temperate climate)
I'd love some too. I'm local, can pick up
07 Jan 24, Jane Pearce (New Zealand - temperate climate)
I would love some yacon! I live in Christchurch. Obviously I would pay postage, but would you also charge for the plants? Thanks.
19 Sep 21, (New Zealand - sub-tropical climate)
Did you manage to find some?
09 Mar 21, Sue (New Zealand - temperate climate)
Is it too late to plant my yakons now. How do I keep the plants alive if it is too late
26 Aug 24, Angela (New Zealand - sub-tropical climate)
No, it’s just the right time to plant the rhizomes or plants. I have some if you need them. I’ll have to find out how much postage. I live in the Bay of Islands.
27 Apr 21, GM (New Zealand - temperate climate)
Just doing some research myself, and I found this comment on the Koanga website - https://www.koanga.org.nz/yacon/
Showing 1 - 10 of 55 comments

My yakons still have some leaves on them and new shoots growing already, it is the start of April in a temperate climate, Australia. When should I harvest them, do I have to let the plant die back, what happens to the new shoots. Regards Maureen

- Anonymous

Please provide your email address if you are hoping for a reply


All comments are reviewed before displaying on the site, so your posting will not appear immediately

Gardenate App

Put GardenGrow in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join 60,000+ gardeners who already use GardenGrow and subscribe to the free GardenGrow planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About GardenGrow | Contact us | Privacy Policy

This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. GardenGrow is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
We cannot help if you are overrun by giant slugs.