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 50°F and 86°F. (Show °C/cm)
  • Space plants: 12 - 16 inches 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

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29 Jun 20, (Australia - tropical climate)
Add compost/composted manures or fertilisers to the soil to put nutrient back into the soil for the next planting.
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19 Jun 20, ace (USA - Zone 10b climate)
Anyone grow True Seed Potatoes in zone 10? Curious when you start your seeds. My seeds are low dormancy and short-day length. Start seeds in August, maybe, to plant out in October?
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04 Jun 20, Pastor Dennis Naidoo (South Africa - Summer rainfall climate)
HI I want to plant some UTD Potatoes in my back yard. Where can i buy seed potatoes and which month will be good to plant them. I live in KZN Richards Bay Regards Dennis
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19 Jul 20, Astrid (South Africa - Summer rainfall climate)
Have a look at https://livingseeds.co.za/potatoes - they sell seed potatoes and ship to anywhere in SA (at the right time of the year). They always stock standard coloured potatoes as well as occasionally some novel heirloom ones. Also on that page is a link with guidance on growing potatoes. Pre-orders are opening soon, shipping is early August ready for you to plant.
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05 Jun 20, Anonymous (South Africa - Summer rainfall climate)
You need to work out your climate zone from the BLUE CLIMATE ZONE TAB at the top of the page. Then check when to plant. Buy from seed selling websites, nursery, farmer produce store, hardware & gardening stores.
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30 May 20, Laura (USA - Zone 7b climate)
Could I plant certain potatoes in zone 7B in June? I live in Southampton County, Va.
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07 Jun 20, Ross (USA - Zone 7b climate)
I live in Zone 7b in Arkansas. It's been an unusually cool and wet spring / summer. I planted four varieties in a prepared bed. (composted manure was tilled in.) The varieties were Pontiac red, Kenebek, Russet and Yukon Gold in roughly equal amounts, purchased prepackaged at a farm store. The seed potatoes were sown in rows 12 -18 inch spacing on Feb 28 by burying shallow, then covering with several inches of composted manure followed by several inches of straw, two bales on roughly 120 sq feet. I did not document when they sprouted but it seemed weak initially but success rate of sprouts was eventually good. The composted manure is weedy and so was the straw, eventually weed pressure was high so I covered with another layer of composted manure. ( I don't remember the date and the plants were 20 inches or so tall, some in blossom. ) Although at the time of harvest the bed was heavy with weeds again that worked long enough to bring in a harvest on June 4th. While harvesting the soil was still quite moist, only two or three potatoes had rotted and the yield was about 2 to 3 nice sized potatoes per plant with up to three small potatoes per plant too. I followed the harvest with a sweet corn. I contemplated a second potato planting but i think it will be too hot. I'm going to make a deep raised bed from pallets manure and straw out in a shady part of my homestead and try a few to see what happens. Hopefully that helps.
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27 Apr 20, Shirley (South Africa - Humid sub-tropical climate)
When growing potatoes what fertilizer does one use
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28 Apr 20, Anon (South Africa - Summer rainfall climate)
Just look for a general all round gardening fertiliser. If you look at all the fertilisers for different crops there is not a big difference in the NPK of them. Depending on your soil 8-12N, 3-6P, 3-6K. I read of fertilisers like 10, 10, 10, and 8, 8, 8. I don't know where you buy them (USA stores?).
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27 Apr 20, Marg (Australia - temperate climate)
Hi, I have some organic potatoes that are starting to shoot quite a lot, I cut them in pieces was about to plant them in containers,but now have heard they should be planted at the end of winter. What can I do? Store them, throw them or give them a go? Marg
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I heard that the potato will stop sending nutrients to the tubers if the stalks are bent. One of the most successful potato harvests I have ever seen was a large container grown project where he used several layers (think of a layer cake) of horizontal plastic fencing and t-posts at each corner to hold the horizontal fencing to keep the stalks from bending at all and support them as they grew. They were able to get an absolutely massive yield with that method although he was sick all summer and didn't care for them or water them at all. I am not sure that the container growing was as pivotal in the results as just keeping the stalks from bending over. I have container grown before and will try it again this spring as well as ground growing using his methods to keep the stalks upright. I think another often overlooked issue is either too much or too little phosphorus and potash in 10-10-10 fertilizer. I think 'balanced' fertilizers can present real problems for root crops since they don't need or want balanced inputs. You will always have too much of something and too little of the other. Also there is a time delay on phosphorus while it stays in the upper part of the soil, so you can apply phosphorus to increase tuber formation, but it takes 3 months to disperse into the soil, while nitrogen sinks like a stone through soil an becomes almost immediately bio-unavailable (or runs off into the environment via water). So if you are using 10-10-10 you are going to end up poisoning your plants in order to get one or another nutrients available in the correct quantity. Plus factor in the time delay to bioavailability. I think it is better to thoroughly prepare soil before you put your garden to bed in the winter than prepare it in the spring (actually I have revived some fruit trees that were very old and no longer producing by fall fertilizing; I got almost $700 worth of organic pears and even more than this in apples last year through fall fertilizing). I also heard (and studied it last year in my own garden) that potatoes grow between the seed potato and the surface. If you bury them deep you will increase yields as there is more space for them to grow above the seed potato. But if you plant them shallow, they have a very narrow area to make potatoes in, significantly reducing production. This means in container gardening you need to put them at the very bottom of a 1'-6" (0.45 meters) tall container to get a full yield. I tried this method last year and doubled my production. I was putting them very close to the surface before last year. Also, potatoes need cool roots and won't produce anything at all if their roots are too hot in the container during the summer. Afternoon/evening shade is a must in Southern US zones or other hot environments. Or you could insulate or shade the container.

- Christian

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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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