Growing Sweet Potato, also Kumara

Ipomoea batatas : Convolvulaceae / the morning glory family

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 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

02 May 17, Pou TeRongomau (New Zealand - temperate climate)
October and November best time to grow kumara in the Waikato Hamilton area.
30 Apr 17, Barb (Australia - temperate climate)
We grow sweet potato as a perennial it in a separate bed (South Coast NSW with no frosts). I trim the lengthy vines to keep them within their bed: this seems to enhance formation of tubers, and also increases the small leafy shoots that we use as a yummy leafy vegetable (eg: Asian Stir-fry greens). We add compost and mulch when growth slows in winter, so it has plenty to feed on the following summer. We don't store the roots - just harvest and eat the roots as required.
01 May 17, Giovanni (Australia - temperate climate)
Good comment about the greens. I will try it. I am further south, well into Victoria and we can grow them.
20 Apr 17, Vicki (Australia - temperate climate)
Hi I live west of Inverell NSW and have been growing Sweet potatoes for a few years now in wicking beds and have been getting a good harvest each year why is it that temperate areas for this veggie are not recommended to be grown here. You are right when you say the vines will travel one of mine was going up a palm tree. I find your sight very informative thank you.
21 Apr 17, Jo (Australia - temperate climate)
They are often not recommended for temperate areas because of shorter seasons. If you strike them from cuttings and get them growing early you should be able to harvest a good crop. I Know of them growing in Toowoomba (cold winters) and they were bordering on being weeds. They are also grown by many people in southern Victoria.
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
27 Dec 20, Rick (USA - Zone 9b climate)
Bob, I had the same problem so I ordered a couple of sweet potato's from Walmart. I tried to grow them on my counter to no avail. I went on YouTube and found out that stores buy potato's that have been sprayed to prevent sprouts. Best if you buy your potatoes from a farmers market. Wash them, then cut them in half. Plant the half's in a good compost and keep moist. You should see slips growing out of your potatoes in a few weeks. I found it time consuming but it works! Best of luck to you.
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.
19 Mar 17, Sandy Greer (New Zealand - temperate climate)
Thanks for that, but I also remember some Maori potatoes being very similar also to the look of this type I ate..my ex use to grow a lot of heirloom veges and it looked similar to what hr grew back then... Might buy 1 again and grow it to see how it grows...as a vine or an up right plant.
16 Mar 17, Sandy.G (New Zealand - temperate climate)
Hi there, I bought a bag of mixed kumara & in it was 5 varieties & 1 was a purple fleshed purple kumara. I think its maybe a relative of potato.. as I am allergic to nightshade family & on eating 1 of these set my tongue and throat tingling, spat it oit and rinsed my mouth out.. any ideas!?
Showing 171 - 180 of 308 comments

I would like to try growing kumera here on Stewart Island in a tunnelhouse. Is there anywhere I can buy sprouts, slips?

- Len Lind

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