Growing Watermelon

Cucurbitaceae c. lanatus : Cucurbitaceae / the gourd family

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

(Best months for growing Watermelon in USA - Zone 5a 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 70°F and 95°F. (Show °C/cm)
  • Space plants: 24 - 30 inches 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
16 Jul 20, Jodie (USA - Zone 9b climate)
My grandkids want to grow watermelon with the seeds from a fresh watermelon. It's mid July and we're in zone 9b in the Arizona desert. Thank you in advance. Happy planting!
23 Jul 20, colleen (USA - Zone 10b climate)
Fun project! Be aware that seeds might be sterile from a store-bought melon (and likely won't be true to seed). But worth a shot for the surprise factor, I think. They should try the paper towel sprouting method to test viability. If seeds sprout, get them in the ground by August and there should still be time for fruits. They'll need plenty of water in hot weather (mulch helps too).
11 Jul 20, Cathy Mallen (USA - Zone 10a climate)
I am wondering what watermelon will grow in zone 10 (the coastal portion) Thank you.
02 Dec 20, Atlantic (USA - Zone 10a climate)
I planted my seedlings from Walmart seeds in October. 50¢ seeds! Charleston Grey watermelon, think seed spitting as a child, has now gifted me 3 melons that I can see (12.01.20). Ps 50¢ package. Bye from Zone10A!
29 May 20, Farai Mutsago (South Africa - Summer rainfall climate)
Where can l buy watermelon seeds in Polokwane or Mussina
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.
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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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