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Growing Sweet Potato, also Kumara

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

Not recommended for growing in USA - Zone 5a regions

  • Plant shoots or cuttings (Slips). Best planted at soil temperatures between 17°C and 35°C. (Show °F/in)
  • Space plants: 40 - 60 cm apart
  • Harvest in 15-17 weeks.
  • Compatible with (can grow beside): Best in Separate bed
  • New shoots on Kumara
    New shoots on Kumara
  • Well grown Kumara
    Well grown Kumara

Sweet Potatoes require a long warm growing season. Plant in free draining loose soil . Fertilise before planting but no more when the plants are growing as it will encourage vine growth. They will go for miles and you will get no tubers. If they do start spreading, lift the vines off the ground to prevent them rooting.

Mound up the soil about 20cm (8 in) before planting Let the plants die down, (leaves die or turn yellow) before harvesting the tubers. Dry them in the sun for a few days . then store in a cool dry place for up to five months.

Culinary hints - cooking and eating Sweet Potato

Use mashed, boiled, roasted, baked or fried. Or use in soups, pies, casseroles, curries and salads.

Your comments and tips

24 Mar 17, Bob (USA - Zone 9b climate)
Trying to find some Evangeline sweet potato slips. I've only been able to find commercial quantities. Any help appreciated
24 Mar 17, John (Australia - temperate climate)
'Evangeline' was developed at a horticultural research institute in Louisiana and has Intellectual Property Rights. This means that it could only be available to commercial growers who probably pay a royalty for the slips for their crops. You could try the Sweet Potato Research Station at: PO Box 120, Chase LA 71324. These restrictions seem onerous for home gardeners but help pay for the development costs for new varieties. Try them, they may be willing to send you a few slips.
16 May 15, Carole Hanley (USA - Zone 10b climate)
I would like to grow these wonderful sweet potato here in Nevada. We ate them in New Zealand and they are beyond good.
21 Mar 12, Malina Beatrice (USA - Zone 10a climate)
I found Kumara at Whole Foods in Encino, but they had them labeled "Japanese Sweet Potato." If I hadn't just seen them on a trip to NZ, I never would have known! Hope it helps.
02 Jan 12, Lisa Baird (USA - Zone 6a climate)
I also long for NZ Kumara, and have been unable to find them in the states. Where can I order tubers for growing or for eating? I'll start a greenhouse if needed. Thank you.
18 Nov 11, graham (USA - Zone 5a climate)
I would like to try to grow kumara potatoes in our green house as you say they need a long growing season. Can you advise me where I can buy tubers/seeds? Many thanks Graham
17 Mar 11, Kim Davies (USA - Zone 5a climate)
I ate kumara everyday when visiting NZ and loved it! Because it was less sweet than USA sweet potatoes. I am craving it and need to find out how and if I can get seeds and grow it in Virginia? Would love your help on this!

how do you know if the sweet potatos are ready - mine have been in the ground for 6 months now

- Anneliese

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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. Gardenate 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.
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