Growing Watermelon

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

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

S = Plant undercover in seed trays T = Plant out (transplant) seedlings

  • Grow in seed trays, and plant out in 4-6 weeks. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 21°C and 35°C. (Show °F/in)
  • Space plants: 60 - 75 cm apart
  • Harvest in 12-17 weeks.
  • Compatible with (can grow beside): Sweetcorn, Sunflowers
  • Avoid growing close to: Potatoes

Your comments and tips

24 Feb 20, Juliet (New Zealand - cool/mountain climate)
Can it get too hot for watermelon plant to survive Tauranga NZ, weather gowing over concrete pavers and river stones ?
25 Feb 20, Anon (Australia - sub-tropical climate)
Growing them over concrete or river stone could do damage to the vines if it is very hot.
14 Jan 20, Dale gibson (New Zealand - sub-tropical climate)
Hi there ,I planted my watermelon seed in early November and surprisingly they germinated within 2 to 3 weeks ,..6 weeks on an the growth is very is mid January 2020 I live tolaga bay east coast nz climate is warm and hopefully will continue threw to march ...have I left it to late.. let me no. regards
15 Jan 20, Another gardener (Australia - sub-tropical climate)
I'm sub-tropical Qld - they plant seedlings here late august and pick the melons up until Xmas. Planting later leaves you wide open to heavy rain, hot weather. A lot of rain when the melons are fully developed and they can/will split. Water melon seeds I threw in the garden in Oct germinated within 2-3 weeks. Here you can grow a spring and autumn crop. I would suggest you planted too late. If not growing I don't think the soil is very fertile.
07 Jan 20, Alice Mukondyo (South Africa - Summer rainfall climate)
can red melon be found in Sa all year round???
09 Jan 20, Anon (South Africa - Summer rainfall climate)
Are you asking about the seeds or the melon to buy.?
26 Dec 19, Phoebe (New Zealand - temperate climate)
I have a watermelon growing and setting teeny baby fruit but they all wither and drop off within a week of setting. Any ideas?
30 Dec 19, anon (New Zealand - sub-tropical climate)
Sounds like you have no bees to pollinate the female flower. Do it by hand. (With a soft artist's brush or use a male flower)
15 Dec 19, Puiti (New Zealand - temperate climate)
Can I grow watermelon in Te Kuiti?
17 Dec 19, Liz (New Zealand - temperate climate)
You should be able to grow watermelon, if you start them early in pots or trays undercover. Have a look here
Showing 11 - 20 of 257 comments

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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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