Growing Zucchini, also Courgette/Marrow, Summer squash

Cucurbita pepo : Cucurbitaceae / the gourd family

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

(Best months for growing Zucchini 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: 50 - 90 cm apart
  • Harvest in 6-9 weeks. Cut the fruit often to keep producing.
  • Compatible with (can grow beside): Corn, beans, nasturtiums, parsley, Silverbeet, Tomatoes
  • Avoid growing close to: Potatoes

Your comments and tips

14 Feb 16, Emily Southward (Australia - sub-tropical climate)
How to get rid of the mildew on the fruits and plants?
23 Jan 16, Valerie (Australia - temperate climate)
Does anyone know if black jack zucchini is a hybrid? Can I harvest seeds for next years crop? Thank you in advance.
16 Jan 16, Pete (Australia - temperate climate)
It is usually a sign of Low Calcium in the soil. you can get some products that contain calcium but they are mixed element sprays etc. you run the risk of putting to much of something else in, that is not required. Best tip I have been given is to place all your eggshell in water for 2 or 3 weeks, then water the base of the plants with this. and next time your preparing your soil, bury all your used (crushed) eggshell into the soil of the garden bed. I just started to use Eggshell water a month ago and I have already picked the new growth fruit that has no sign of the rot, some still do but instead of all of them rotting I get to eat 7 out of 10 now. Hope this helps.
10 Dec 15, Ray pollard (Australia - temperate climate)
My zucchini keep going rotten before there ready to pick, why?
28 Dec 15, Tony (Australia - sub-tropical climate)
I was told recently that to help with the end rot that you mention. The trick seems to be to pick off the flower on the end of the fruit as soon as it begins to wilt/ wither.
10 Apr 15, maz (Australia - sub-tropical climate)
are zucchinies only a t certain times? i have had no luck of late . I used to grow huge ones .fertilized and watered and mounded just seem to fade and die
24 Mar 15, Trinity (Australia - temperate climate)
I have planted zucchini once in pots then planted in bed & once direct into the ground. Both times the plant has split & opened up weeping gaps on the stem which then drops off. This has happened after the plant has been established & fruit has already been harvested. Hoping someone might have some idea as to the cause.
24 Apr 16, Kim (Australia - cool/mountain climate)
Hi Trinity, I had the same thing happen to my zucc & pumpkin plants where I use to live (sub-tropical area) I found that it was Slater's (aka woodlouse, roly poly, pill bug) eating the stems which start the splitting. I have read that they don't eat living plants just decaying plant/fruit waste BUT that isn't true esp if you keep your garden & pots clear of dropped fruit/veg & old plant leaves etc because they will turn to living plants when there isn't much food source. I don't recommend leaving that sort of food for them. Best option is make traps from hollowed out orange halves or seedling punnets filled with potato peelings, to distract slaters. I used the orange method and it did help a lot & when an orange half is full with slaters I'd bin them because they were everywhere in large, plague like numbers. Also keep mulch away from the stems. Cheers Kim
17 Jun 15, (USA - Zone 6b climate)
If you zucchini are splitting check for bugs. called zucchini borers. they will eat the stem and root of the plant . When you water them, see the many bugs crawling from the bottom of the stem and climbing on the branch to escape the water. In N.C USA plants will produce for about 5 weeks and die. You will know this by the leaves turning yellow . It is very hot in NC above 97 F or 37 C in the summer. dg
12 Dec 14, Anna Dicker (Australia - sub-tropical climate)
I have had male flowers on my zucchini plants for a few weeks but no female - well1 only off 6 plants flowers. Any solutions or answers??
Showing 111 - 120 of 255 comments

yes they can.

- Anonymous

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 Gardenate 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 60,000+ gardeners who already use Gardenate and subscribe to the free Gardenate planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About Gardenate | 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. 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.
We cannot help if you are overrun by giant slugs.