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 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
  • 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

09 Mar 21, Sonke (South Africa - Humid sub-tropical climate)
Is it possible to plant or sow seeds in my region now in March ,Humid subtropical region..
10 Mar 21, (South Africa - Humid sub-tropical climate)
Check the monthly planting guide here. Better to plant in the spring.
08 Mar 21, Lannu (New Zealand - temperate climate)
I bought a melon plant from bunnings and I'm planting it separated from another plants for a good grow but this is the 4th week and it's only a foot long now the growth. So I'm not sure if it's normal I thought it should be fast growing like pumpkin plants? Please waiting for your response.
09 Mar 21, Darren (Australia - temperate climate)
You are probably at the end of the growing season for watermelons. You can either persevere and hope it grows or pull it out and plant something in season.
03 Jan 21, EMC (New Zealand - temperate climate)
Anyone have tips if watermelon would work down in Invercargill? Would love to grow some fruits down here, but can't be tree based types. Rather tight on funds so cheaper is always better, but also happy for advice as well.
05 Jan 21, A (New Zealand - temperate climate)
EMC it is there at the top of the watermelon page for NZ temperate climates when to plant. They grow along the ground and buy some seeds from a seed selling website or shop selling seeds.
21 Oct 20, Modiba matee john (South Africa - Summer rainfall climate)
HI which watermelon variety or hybrid is larger and sweet?
23 Oct 20, (South Africa - Summer rainfall climate)
Check on the internet for size - seed companies.
19 Oct 20, Mokone Mahlatsi (South Africa - Summer rainfall climate)
Hi my question is I plant Carolina crosse watermelon it growing very well but the problem is not sweetheart y ? Thank you
03 Sep 20, Kay (Australia - sub-tropical climate)
What fertiliser is best for watermelons?
Showing 1 - 10 of 275 comments

Check the monthly planting guide here. Better to plant in the spring.

- Anonymous

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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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