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 S S      
T T T T T T T T T T T  
P P P P P P P P P P P  

(Best months for growing Sweet corn in Australia - 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 61°F and 95°F. (Show °C/cm)
  • Space plants: 8 - 12 inches 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

29 May 20, Jack (Australia - tropical climate)
What is the good time for Maize harvesting?? Our place is tropical, had a winter for short period of time, summer start from September till March.
30 May 20, Anonymous (Australia - tropical climate)
11-14 weeks after planting. Read the comments here Gardenate - the info is in the notes.
17 Apr 20, Colin and Taksan (Australia - temperate climate)
Our corn has grown well but on opening it to check there were caterpillars eating it. What is the best way to control these?
20 Apr 20, (Australia - temperate climate)
If they don't eat much just cut the damaged section off. That is what I do. Caused by the heliothis moth. Look on the internet for a spray.
10 Apr 20, Pamela MATHEWS (Australia - tropical climate)
Hellow .. what is the best way to plant corn..eg:in rows or bunch in together..first time grower..thank you
14 Apr 20, Anon (Australia - temperate climate)
Plant 2-3-4 rows about 80-90cm between rows. When plants are about 40-50cm high run some fertiliser down each side of the plant and then hill the soil up around the plants. Makes the plant more stable in the ground.
05 Apr 20, Robyn (Australia - tropical climate)
I’ve always though corn was super hardy. My plants are about 3 weeks old, decent size and some little green caterpillars (about 1cm long) smashing it. Please help, what can I do? Natural solution?
06 Apr 20, Jenni (Australia - sub-tropical climate)
Hi, we use a mix of 1 tablespoon molasses to 1 litre water on caterpillars in corn, swamp lilies, and new cycad leaves. Molasses is available in 2 litre containers from produce stores. Good luck.
06 Apr 20, Anon (Australia - temperate climate)
Go to iView (ABC TV) on the internet and find Landline from yesterday Sunday 5/04/20 and watch the show. There is a story about the army worm (I think) that has just arrived in Northern Australia in particular Qld that is hammering sweet corn/maize.
23 Mar 20, Dale Winton (Australia - tropical climate)
Hi, Just wondering if it is a problem to plant sweet corn in trays and transplanting once bigger? Thanks Dale
Showing 21 - 30 of 328 comments

Perth: This impressive crop does take up a bit of room but it's well worth it; the sweetness of fresh picked home-grown sweet corn is hard to beat. Plant from September through to January. Preparing the site Choose a sunny site that’s protected from strong winds. Sweet corn is a hungry crop so it’s important to enrich your soil before planting. Add a plenty of aged manure and a handful of blood & bone per square metre and fork it in well. Sweet corn will do well in a bed that’s previously grown healthy peas or beans. In the right conditions, each plant will usually produce 2 ears of corn. Planting Plant seedlings or seeds (ensure seeds are fresh). Space 30cm apart and plant in blocks rather than a single long row. Planting in blocks assists pollination which is essential for the development of kernels. Plant early and late varieties in separate blocks for a longer season. Water seeds well after planting then sparingly until germination occurs as the seeds can rot easily. When the stalks are about 20cm high, mound the soil up against the stalks. This process, called hilling, encourages more roots to grow which will help stabilise the plant during windy conditions. You can also achieve the same result by planting the seeds in a furrow and backfilling as the plants grow. Watering and fertilising Once the plants are well underway it’s important to ensure an adequate moisture level, especially since the plants will be at their peak of fruit production over the hot months. Drip irrigate if possible and mulch well to retain moisture. As soon as the tassel appears at the top of the plant, give the soil a boost with a granular fertiliser that’s high in nitrogen. Insufficient pollination results in ears of corn with lots of missing kernels. Planting sweet corn in one long single row can result in most of the pollen being blown away, which is why gardeners plant corn in blocks instead.Can be hand pollinated by cutting off a pollen-laden tassel each day and gently brushing over the silks . Sweet corn is ready to pick 2-3 weeks after pollination and it's important to keep up the water during this time.

- Mike

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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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