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Growing Zucchini, also Courgette/Marrow, Summer squash

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

(Best months for growing Zucchini in USA - Zone 5a regions)

S = Plant undercover in seed trays 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 70°F and 95°F. (Show °C/cm)
  • Space plants: 20 - 35 inches 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

31 Dec 16, Yen (Australia - temperate climate)
Hi! I have the same thing in my garden I read about this treatment for white powdered mildew and it worked for me! Mix 1 teaspoon bicarbonate with 1 pint of water and water leaves that are affected. Hope it helps
03 Jan 17, John Mauger (Australia - temperate climate)
A 10% solution of milk and water also helps with powdery mildew. It is used organically, how it works, I don't know, but it does.
22 Dec 16, Melvyn Andrews (Australia - sub-tropical climate)
For the last three years I have failed in growing tomatoes. Despite spraying with recommended spray the worms/grubs get them. Last year I got one good one out of about 2 Kg. So this next year I am going to try Eggplant and Zucchini. Am I too late to plant now? What type of decease do they attract? If so,what can i do? Thanks from Sydney
23 Dec 16, John (Australia - temperate climate)
The grubs attacking your tomatoes will be fruit fly. They attack any fruit, including citrus. you could completely cover your plants with flywire or tuille netting
24 Dec 16, John (Australia - temperate climate)
Eggplant are probably also susceptible to fruit fly so cover them as you would tomatoes. I've not heard of fruit fly on zucchinis and they are heavy yielders of versatile fruit so they may be a good option. Trust this helps.
21 Dec 16, Dianne Lovell (New Zealand - temperate climate)
Any benefit in removing the lower grown leaves. The thing is a triphid
02 Feb 17, Karen (New Zealand - sub-tropical climate)
I agree with John. For powdery mildew prevention and control I use a brew of 3tablespoons of baking (bicarb) soda, 1/2 teaspoon non detergent dish soap to 6litre of water. The soda changes the ph and destroys the spores, soap acts as sticking agent. MUST test spay, leave 24-48hrs observe for chemical damage. May need less soda. Do not add anything to brew like fertiliser or neem oil, as this will change the ph and the brew will either become ineffective or cause damage. When ok with mix, spray everything (plant, container, soil, stakes etc) all over. Give sprayer a good shake prior and during application. Don't pour leftover brew into soil - ph change can cause growth problems of young plants. I do this weekly from planting out regardless of need; this minimises powdery mildew starting up. My cucs, courgettes and toms get this treatment but the amount of soda required may vary. I keep a note of the brew(s) and results for future reference. Best done in the evening so it has time to do its thing overnight without the risk of sunburn. Make a fresh batch of brew for each spray session. Remove some additional leaves to enable good ventilation throughout plant. What variety of triphid are you growing?
24 Dec 16, John (Australia - temperate climate)
The only benefit that I know of would be to increase air circulation and reduce mildew problems. If you are plagued by powdery mildew mix up a spray of 10% milk with water and thoroughly spray your plants. I can't explain why but it works. Trust this helps.
29 Nov 16, Sukhdeep singh deol (Australia - temperate climate)
Hi Ive got few acres of zucchinis at mildura area and as soon as the new fruit comes out it starts to turn yellow. Is it a lack of something or is it something else. Can you plz tell me what can i put on them.
29 Nov 16, John (Australia - temperate climate)
It sounds like they havn't been pollinated (fertilised). This is a growing problem with the diminishing bee population. If the area was small you could hand pollinate them but this is hrdly practical on two acres. You could stop and ask any other farmers growing zucchinis, pumkins, etc. They may have some advice.
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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. 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.
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