Growing Sweet Potato, also Kumara

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

Not recommended for growing in New Zealand - cool/mountain regions

  • Plant shoots or cuttings (Slips). Best planted at soil temperatures between 63°F and 95°F. (Show °C/cm)
  • Space plants: 16 - 24 inches apart
  • Harvest in 15-17 weeks.
  • Compatible with (can grow beside): Best in Separate bed

Your comments and tips

14 Sep 20, Anonymous (Australia - cool/mountain climate)
Yes you can but you don't need a whole kumera, a piece of vine will do. A piece about 30-60cm long of the new vine growth. Place in a trench with the tip sticking out of the soil, water twice a day for the first 2-3 weeks.
17 Sep 20, (Australia - sub-tropical climate)
Or depending on how big the spud is, cut it into several pieces and let them dry in the sun for a few days then plant them.
31 Aug 20, ganaa (Canada - Zone 2b Sub-Arctic climate)
how can i plant in in the polar? (Gardenate ; Not recommended for growing in Canada - Zone 2b Sub-Arctic regions)
10 Aug 20, Nicky Holmes (New Zealand - temperate climate)
Hi can you please tell me if Dunedin is the right temperature to grow Kumars outdoors or is it to cold? Thanks.
11 Aug 20, Anon (New Zealand - temperate climate)
Go to Sweet potatoes/ Kumara page, temperate climate zone and check the planting calendar.
29 Jun 20, John Martin Barger (USA - Zone 7b climate)
I have a sweet potato that has sprouted pretty heavily on my kitchen counter. I live in Memphis, TN. Is there any chance of having success if I were to plant it now? Or is it too late in season?
30 Jun 20, Betty (USA - Zone 7b climate)
I'm just next door in Arkansas and will be planting some slips from one in my kitchen today (June 30). We have just enough time before frost to make decent sweet potatoes. You know we can eat the leaves like spinach as well? My (American) kids grew up in SE Asia and thought sweet potato leaves were a variety spinach.
05 Apr 20, Pam Adam (Australia - tropical climate)
I have sweet potato growing. Is it okay to cut away the continuous runners it is producing?
06 Apr 20, Anon (Australia - temperate climate)
You could cut them off from about 1-1.2m each side if you like. Over fertilising with N will produce a lot of leaves/vines. Cut off some of the new vines and plant them with the growing tip out of the soil. Read below about how to do it.
09 Mar 20, Garden Gnome (Australia - temperate climate)
I have had for over one year a half 200 litre plastic drum with a sweet potatoes growing in it. Just this past weekend I have dug around in the totally dry soil looking to see what was there. I did this with my hands after loosening it up with a garden fork all around the side of the drum. The leaves were not dying off in fact new shoots are forming. I only did this as we have had 1 week of dry hot weather. I harvested 3 very good sized spuds and put the rest back and topped up with well mulched soil. No extra fertilizer has been used and this is the second time I have turned this drum. As the soil lowers and parts of tubers show I top up with more well mulch soil. With watering and good old mother nature we have bought no sweet potatoes at all for quite some time. I have no idea how long they have been growing I don't garden like that.
Showing 11 - 20 of 252 comments

It may survive if you plant it now - might not grow much or produce a crop. Might be better to try again say Oct and plant out Nov Dec. You are temperate climate.

- Mike Logan

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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. 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.
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