Growing Sweet corn, also corn,maize

Zea mays, var. rugosa : Poaceae / the grass 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 T T
P P           P P P P P

(Best months for growing Sweet corn in Australia - sub-tropical regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • P = Sow seed
  • Sow in garden. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 16°C and 35°C. (Show °F/in)
  • Space plants: 20 - 30 cm apart
  • Harvest in 11-14 weeks.
  • Compatible with (can grow beside): All beans, cucumber, melons, peas, pumpkin, squash, amaranth
  • Avoid growing close to: Celery.

Your comments and tips

23 Nov 10, Bev Joannou (Australia - temperate climate)
My corn is about 4' high and the leaves have opened up to reveal the immature green corn cob, it isn't encased in it's protective leaves, what is going wrong?
24 Nov 10, Sri (Australia - temperate climate)
Can you give us a bit more info plz. Need to know how long they have been in and where u sourced the seeds/seedlings from because it sounds like either wood beetles have stripped your corn (very rare) or the seeds are for ornamental corn one way or another if it were me i would pull them up and start again. For temperate climate now is the ideal time to start your corn.
30 Nov 10, Bev Joannou (Australia - temperate climate)
I planted the kernals in trays in September and transplanted them in the garden in October, the seeds I used were a Digger's Heirloom variety. Yes I will pull them out and start again, thank you for your advice.
15 Nov 10, WogBoy (Australia - temperate climate)
re mel, 8 Nov, try not to water at the base of the plants but around them once they are establish. i have my corn in rows anbd i water in between the rows so water goes both sides of the plant. the base of the plant stay dry and you can fill the middle trench with straw to keep the ground wet and minimise evaporation
11 Nov 10, Leah (Australia - temperate climate)
Thanks Chris - it's amazing what a difference just a few warm days in a row and some seaweed can make . . Will put in another batch of seedlings once these first lot take off.
08 Nov 10, Mel (Australia - temperate climate)
My corn is growing well, I have noticed that there seems to be roots showing at the base of the stalk, should I build the soil up?
29 Jan 12, Bryan (Australia - sub-tropical climate)
Mel, the roots you refer to are not feeder roots, they are mainly to stabilise the plant stalk.
10 Nov 10, Sri (Australia - temperate climate)
The secret with corn is to keep them warm they dont like cool soil so get some straw or some mulch and cover the roots up that will keep them warm but also allow for good drainage so the roots dont stay wet and start to rot.
06 Nov 10, leah (Australia - temperate climate)
I have planted corn in large raised beds - they plants are now very pale green and haven't grown very much - they were planted about 6 weeks ago in an out Melb suburb. I suspect I planted them too early - any suggestions - thanks.
02 Dec 10, Sam (Australia - arid climate)
If they're not thriving, try a liquid fertlizer. Organics can work but dissolved conventional fertilizers work faster. If they are pale and weak they might need phosphorous (superphosphate or chook poo, or a soluble fertiliser) or nitrogen (urea or sulphate of ammonia are both soluble and very high in nitrogen, some soluble commercial fertilizers have a lot, chook poo also has some). It might take a week or two to see results.
Showing 241 - 250 of 324 comments

Ask a question or post a comment or advice about Sweet corn

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.