Growing Watermelon

Cucurbitaceae c. lanatus : Cucurbitaceae / the gourd family

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

(Best months for growing Watermelon in Australia - tropical regions)

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

04 Sep 20, Anon (Australia - sub-tropical climate)
Just look for a general garden fertiliser. There is not that much difference in them
26 Apr 20, Phillip Bellis (Australia - tropical climate)
We are having a watermelon growing comp. at a school just out of Darwin. Seedlings are just a week old in pots. When would be the best time/age of seedlings to transplant. Weather is warm at 32-35 C and dry but being watered 2x a day. Thanks
27 Apr 20, Another gardener (Australia - tropical climate)
The leaves that come out on germination are called the cotyledons, then come the first true leaves. When you have the 3-4 set of true leaves transplant them. I grow things in 500gm margarine containers, when the seedlings have grown to the above stage (like about 100mm high and round) the soil in the container has lots of roots in it to hold the soil together when you take the plant out to transplant, try and keep that all in tact. Best to tip upside down into one hand gently. Don't over do the nitrogen - you will end up with a lot of vine.
22 Apr 20, Lisa (Australia - temperate climate)
My daughter (7) planted her watermelons seeds several weeks ago and has been watering and tending to them ever since. Today, we noticed a little sprout- very surprising I have to say! Will this melon grow? If so, how long till we see a melon? We live in South West of western Australia
22 Apr 20, Anon (Australia - sub-tropical climate)
Wrong time of the year to plant really, try spring time later this year. Some flowers will just be a flower (male), some will have a small melon on them(female). If the female flower is pollinated then the melon will grow, if not it will die. You can pollinate by hand. Read on the internet how to do it. Melons take about 3-4 weeks to grow and then 3-4 weeks to mature.
01 Mar 20, Kerrie (Australia - tropical climate)
A few weeks ago I harvested the last of my watermelon. I lost a few due to the rain and too much water. I live in the coastal area of Brisbane. A few plants have self seeded, is it too late for them to bare fruit ?
02 Mar 20, Another gardener (Australia - sub-tropical climate)
My first time growing them this time of year. Mine are just starting to send runners out and I feel I maybe a bit late. The farmers around here (Bundy) planted out seedlings about a month - 6 weeks ago. You could try, depends on what the late Autumn early Winter is like, warm or cool.
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 slow...it is mid January 2020 I live tolaga bay east coast nz ...weather climate is warm and hopefully will continue threw to march ...have I left it to late.. let me no. regards
Showing 21 - 30 of 169 comments

Will you please tell me how to identify wild watermelon vines from planted seeds before waiting for the vine to produce fruit and mature. For instance, is there a distinct difference between the leaves? Thank you, Soheil Taheri.

- Soheil Taheri

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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. Gardenate 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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