Growing Potato

Solanum tuberosum : Solanaceae / the nightshade family

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

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

  • P = Plant seed potatoes
  • Plant tuber. Best planted at soil temperatures between 10°C and 30°C. (Show °F/in)
  • Space plants: 30 - 40 cm apart
  • Harvest in 15-20 weeks. Dig carefully, avoid damaging the potatoes.
  • Compatible with (can grow beside): Peas, Beans, Brassicas, Sweetcorn, Broad Beans, Nasturtiums, Marigolds
  • Avoid growing close to: Cucumber, Pumpkin, Sunflowers, Tomatoes, Rosemary

Your comments and tips

30 Aug 15, ilona bresca (Australia - temperate climate)
why not plant the potatoes that have gone green in the kitchen. can you still eat them after peeling the green off ?
10 Oct 15, Sarah (Australia - cool/mountain climate)
We constantly find potatoes growing in our compost (usually green ones I've thrown in) so I have long since stopped buying seed potatoes! Potatoes that are just starting to green, I just peel til they're not green anymore and never had any side effects. That said, one of our dogs ate a rather green potato while she was a pup...the associated get bill made for a very expensive potato crop that year...!
15 Aug 15, Lynda Rice (Australia - temperate climate)
How long should my Potatoes take to grow? I have just tried to dig up one plant and the potatoes are still really tiny so obviously not ready yet. How do I tell when to dig them up? Should I be fertilising and if so with what? Thanks
16 Oct 15, Lachlan Turner (Australia - temperate climate)
Wait till the above ground foliage dies off.
19 Aug 15, Sarah Johnstone (Australia - sub-tropical climate)
Hi Lynda, potatoes take about 5 months or so to grow to a good size. You'll get an assortment of sizes. They're ready to harvest when the vine starts to wither. The smaller potatoes are good to keep for next year's crop. If the vines aren't withering after 5-6 months, you can try to kill them off yourself, apparently that's what they do in Idaho (or so a friend tells me!)
15 Aug 15, Sally (Australia - temperate climate)
Could some one please tell me when to plant potatoes in Melbourne, Victoria Cherrs
20 Aug 15, Porto (Australia - temperate climate)
Hi Sally, plant now if you want new spuds for Christmas. I have just put mine in, and I always plant on 15th August
28 Jul 15, etelka. (Australia - tropical climate)
When is the best time to plant potatoes in gold coast ....
01 Aug 15, kath (Australia - temperate climate)
I planted tubers on 1st july and they are already growing. My large potato tub is looking like trees at the moment as all the potato tubers have sprouted. I find this to be a good time of year to plant tubers. I'm located in Brissie.
20 Jul 15, clark (Australia - temperate climate)
When do we plant potato seed Tasmania
Showing 491 - 500 of 831 comments

The handbook-which I provided the location to in my prior reply is not very beginner'ish but it is comprehensive covering issues you may never encounter- but you do need the reference material. I have a few thoughts to add. 1. Hilling up while the plant is growing-if you are covering leaves I find this fundamentally wrong. Leaves are specialized and designed to collect light, they are not roots. So I opt to plant my seed potatoes deep enough on day one- however I tend to have the luxury of very well airated, light soil. This means the seed potato has a steady air supply and can sense the heat from the sun even at deeper depths 2. Your seedpotatoes need all their potassium Immediately. Potatoes strangely take up all their potassium that they need really early. -and don't uptake more. If there is not enough potassium in the very early stages your potatoes might have hollow heart (looks like hollow rotting middles). Late application of potassium tends to be useless 3. Potatoes seem to respond really well to the addition of microryzal fungi - in my area we source that under pine trees in a forest- we just take some forest floor duff with a dust pan and add to the potatoe planting soil. To sum up - your seed Potatoes should be about the size of chicken eggs (if larger cut up ensuring an eye on each piece and allow a few days to heal/scab up before planting). You need to chit them(make them sprout-place in dark so they sprout). Plant in soil with Compost, a sorce of potassium and microryzal fungi. If for some reason you cannot source any compost/pottasium/microryzal fungi -plant anyhow potatoes are tough -there is still a good chance they will be Okay -depends on the condition of you soil. In my area I can water deeply once per week. Harvest when about half the leaves have fallen over as if to die. If you harvest sooner you may be compromising on size-because as long as those leaves can collect light they can store the energy in the tubers. Good luck - it is so much easier than it sounds- and all those diseases in the handbook are rare and if the plants are strong (well fed) they can manage just fine, potaoes are pretty tough root crop. In other words- you can grow potatoe.

- Celeste Archer

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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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