Growing Watermelon

Cucurbitaceae c. lanatus : Cucurbitaceae / the gourd family

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

13 Jun 22, Fifita Filipe (New Zealand - temperate climate)
Will the seed collected from hybrid watermelon can be ok to grow in our garden???
17 Jun 22, (New Zealand - sub-tropical climate)
Hybrid is a cross of different varieties - plant these seeds and the watermelons may be hybrid or like one of the crosses.
15 Jun 22, Liz (New Zealand - sub-tropical climate)
Seeds saved from hybrids don't usually grow true.
06 Jan 22, Jen (New Zealand - temperate climate)
Can I grow watermelons in Christchurch or is it too cold
11 Jan 22, (Australia - sub-tropical climate)
Yes look in the planting calendar guide. It is generally a Spring planting crop.
21 Aug 21, ravindra govind (New Zealand - temperate climate)
hi is it possible to grow melons in wellington
23 Aug 21, Megan (New Zealand - temperate climate)
Yes. We have grown them for the last two years. If you have a hot, sheltered spot that other plants wither and die in watermelon will thrive. We find it needs good, deep soil and lots of water. Better to go with a few plants a nip off the end once you have a couple of fruit on each rather than try and make one plant produce heaps of fruit.
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.
11 Mar 20, Sandra (New Zealand - temperate climate)
Help, I planted some watermelon seeds and they have grown so well. Sadly there 13 plants that are so close together in the same pot, I now to worried if I move and replant them they will die. What should I do!
Showing 1 - 10 of 40 comments

hi is it possible to grow melons in wellington

- ravindra govind

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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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