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
  • Mature watermelon
  • Melon flower
  • Watermelon

Large, round or oval, smooth green skinned, delicious, sweet pink fleshed melon.

Some have stripes on the skin.

Some varieties will produce fruit up to 14 kg (31 US pounds).

Harvest when the part in contact with the ground is turning yellow and the fruit sounds hollow when tapped.

Watermelon needs plenty of room to grow as it sends out long vines

Needs a long warm season to mature.

Culinary hints - cooking and eating Watermelon

Cut up and eat in slices.
Use to make fruit drinks.
Use in fruit salads.

Your comments and tips

10 Feb 24, Rob Taege (New Zealand - sub-tropical climate)
After last year's disappointment of being so wet, this year has had lots of sun hours with intermittent rain. However, a few weeks ago I noticed two watermelon fruits had their skin punctured. I just chucked on them today and now half of my fruit has punctured holes in them. I have a few pukekos in the paddock that come over and pick my unripe tomatoes from the plants. Would they peck at watermelon fruit as well? If not, what other animal or bird would do this and how do I stop them? I'm 100% sure it isn't rats as the holes are punctured not gnawed, Any suggestions, please before I lose my whole crop.
07 Feb 24, Lawrence Msibi (South Africa - Summer rainfall climate)
Which is best fertilizer to use in Mpumalanga for planting watermelons and when to apply such fertilizers. Furthermore, the pesticides etc when to start spaying my watermelons, Thank you so much.
02 Jan 24, (Canada - Zone 3b Temperate Warm Summer climate)
May if you are zone 3b
02 Jan 24, (Canada - Zone 3b Temperate Warm Summer climate)
Plant undercover in seed trays in May and then transplant seedlings in June
24 Dec 23, Olawale Kelani (Canada - Zone 3b Temperate Warm Summer climate)
Hi, Please, what is the best time to plant watermelon in New Brumswick, Canada? Thank you.
04 Oct 23, Anonymous (New Zealand - sub-tropical climate)
hi, trying to find seeds for the watermelon known as All Sweet Watermelon.
07 Oct 23, Anonymous (Australia - sub-tropical climate)
You may have to buy from Australia - or try google in NZ
19 Sep 23, Amanda (USA - Zone 8b climate)
I thought my watermelons had died off but in the beginning of this month (September) they decided to start growing again any chance they will actually survive or am I wasting my time?
20 Sep 23, Anonymous (USA - Zone 8b climate)
It does say plant Feb March.
12 Sep 23, Zakes (South Africa - Summer rainfall climate)
Hi. I'm staying in Roodepoort, West of Johannesburg. I'd like to find out what type of watermelons that I can plant in this area. Secondly, what are the biggest and sweetest watermelon type that are suitable for the climate conditions of Roodepoort?. Kind regards Zakes Mahlangu Cell: 082 866 0937 (WhatsApp and Voice)
Showing 1 - 10 of 334 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. 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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