Keep your garden growing - see what to plant right now

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 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
  • 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

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
15 Jan 20, Another gardener (Australia - sub-tropical climate)
I'm sub-tropical Qld - they plant seedlings here late august and pick the melons up until Xmas. Planting later leaves you wide open to heavy rain, hot weather. A lot of rain when the melons are fully developed and they can/will split. Water melon seeds I threw in the garden in Oct germinated within 2-3 weeks. Here you can grow a spring and autumn crop. I would suggest you planted too late. If not growing I don't think the soil is very fertile.
07 Jan 20, Alice Mukondyo (South Africa - Summer rainfall climate)
can red melon be found in Sa all year round???
09 Jan 20, Anon (South Africa - Summer rainfall climate)
Are you asking about the seeds or the melon to buy.?
26 Dec 19, Phoebe (New Zealand - temperate climate)
I have a watermelon growing and setting teeny baby fruit but they all wither and drop off within a week of setting. Any ideas?
30 Dec 19, anon (New Zealand - sub-tropical climate)
Sounds like you have no bees to pollinate the female flower. Do it by hand. (With a soft artist's brush or use a male flower)
15 Dec 19, Puiti (New Zealand - temperate climate)
Can I grow watermelon in Te Kuiti?
17 Dec 19, Liz (New Zealand - temperate climate)
You should be able to grow watermelon, if you start them early in pots or trays undercover. Have a look here www.gardenate.com/plant/Watermelon
18 Nov 19, Bickie Mbenge (South Africa - Summer rainfall climate)
Hi Which sweet large watermelon do you recommend for me. I want to start watermelon farming. Please recommend seeds name. Regards
19 Nov 19, anon (South Africa - Summer rainfall climate)
I suggest you phone your agricultural department and ask. Generally it comes down to what kind of melon you want to grow, seeded, seedless, big, small. Check out a few internet seed selling companies also and read up about the different varieties.
Showing 1 - 10 of 245 comments

I have a watermelon growing and setting teeny baby fruit but they all wither and drop off within a week of setting. Any ideas?

- Phoebe

Please provide your email address if you are hoping for a reply


All comments are reviewed before displaying on the site, so your posting will not appear immediately

Gardenate App

Put GardenGrow in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join 30,000+ gardeners who rely on GardenGrow. Subscribe to our free planting reminders email newsletter


Home | Vegetables and herbs to plant | Climate zones | About GardenGrow | Contact us | Privacy Policy

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.
We cannot help if you are overrun by giant slugs.