Growing Watermelon

Cucurbitaceae c. lanatus : Cucurbitaceae / the gourd family

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

(Best months for growing Watermelon in Australia - sub-tropical 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 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

Your comments and tips

01 Sep 17, Coccinelle (Australia - temperate climate)
I have 1m square veg boxes. In one I've only planted a few pumpkin seedlings. Can i use the rest of the space to grow watermelon? Will they be compatible?
04 Sep 17, Darren (Australia - temperate climate)
In that space, you will only be able to grow 1 or 2 pumpkin or watermelon vines. Both require a lot of room.
04 Sep 17, Mike (Australia - sub-tropical climate)
A 1 square meter garden would only support about1- 2 pumpkin plants. Or only 1-2 water melons. About 3-4 cucumber plants. Just think how big the plants will grow and how much nutrient they will require.
17 Aug 17, Rodney A Dwight (Australia - sub-tropical climate)
What is the best soil condition water Mellon grow in was and best time to sow
18 Aug 17, Mike (Australia - sub-tropical climate)
Sub tropical - plant them now. If frost is a problem grow in a pot for awhile. Water melons are usually picked before Xmas. Any reasonable soil - not a heavy clay or very sandy. Read up about how to grow them - google it. Plenty of water.
25 Feb 17, Michael Mizzi (Australia - temperate climate)
I tried to grow water melons but my vines never produce any fruit,, yes no fruit,, I have planted heaps of seeds all over my yard in different positions and I have watched the water melon vines grow very big and spread everywhere but the vines never grow any fruit what am I doing wrong. I have used mulchand compost in the soil I have prepared the soil properly with the appropriate top soil and cow manure,, please help me,, thanks Michael
05 Dec 17, marylou (Australia - sub-tropical climate)
Hi, Have you notice any bees? If you don't then that might be you problem. regards Marylou
01 Mar 17, Mark (Australia - temperate climate)
With Watermelon, I find the leaner the soil, the better (I grow in a very sandy/gravel soil with great results. In a temperate climate you should get your seeds planted early Spring, and get the seedlings in the ground once the overnight temperatures rise (late Sept/early October) as they need a long Summer season. I'm in S.E.South Oz and grow both Watermelon and Cucumber in abundance. Regular heavy watering in a North facing (full sun) position should do the trick. As Watermelon and Cucumber are the same family, once you start seeing flowers, spray/mist water onto the flowers to promote more growth. Good luck!
26 Feb 17, John (Australia - temperate climate)
Watermelons generally like a long hot season. Next season look up some of the heritage seed companies and get seed of varieties that are 'short' season or cooler climate. This may solve your problem as in countries like Canada and The northern USA as well as some parts of Europe watermelons are grown. Your soil preparation sounds great. Cucurbits like watermelons produce male flowers earlier than female (fruiting) flowers so growing a shorter season variety may help. All the best.
05 Feb 17, jenny philippi (Australia - tropical climate)
we have planted potatoes in our veg but all of a sudden this vine appears and weeks later we realize it is a watermelon vine your page said watermelons should be avoided planting with potatoes. ours came up on their own. will both survive?
Showing 61 - 70 of 169 comments

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

- Lisa

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