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 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

31 Jan 19, Mike (Australia - sub-tropical climate)
Google about growing it in WA
24 Jan 19, Noel (Australia - temperate climate)
I live in Perth wa what is the best time to grow sweet corn anfor what period can you grow for
31 Jan 19, Mike (Australia - sub-tropical climate)
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.
25 Jan 19, Amanda (Australia - temperate climate)
I’m not from WA but this lady has blogged about her experiments with different vegetables in Perth, including corn. I can’t post the link because of the spam filter, but search for “belle’s veggie garden WA now and then” and click on the veggie link. Basically she only really had success in December.
24 Jan 19, Mike (Australia - temperate climate)
All year probably - summer may require a lot of watering though.
07 Jan 19, (Australia - temperate climate)
I have planted sweet corn from commercial seed in Melbourne and the stems are growing well, but instead of corn heads of corn i have a grain sprig which I think is maize sprouts. What is happening?
10 Jan 19, Jamie Graham (Australia - temperate climate)
It's all good. Sweet corn have male and female parts. The female parts become the cob of corn. The male parts grow from the head of the plant (the tassel) that bear pollen grains on the anthers. The pollen grains fall and fertilize the female 'silks'. You may help pollination by giving the stalks a bit of a shake to release the pollen grains. If you have never grown corn before you are in for a treat,
08 Jan 19, Mike (Australia - temperate climate)
Don't really get what you are on about. Sweet corn is maize just it is sweet and not starchy. Sometimes you have little side cobs form that don't have much husk and the corn cob comes out with kernels showing. Probably a bit deformed. I suggest you buy seed from a internet seller or nursery/Bunnings.
01 Jan 19, Rita Sciacca (Australia - sub-tropical climate)
I have corn plants growing but at the side of the plants is another shoot. Am I supposed to cut away this extra shoot. My mum says that you need to remove this extra shoot as it takes away energy from the main plant. Your advice appreciated.
05 Jan 19, Mike Logan (Australia - sub-tropical climate)
You could do either - leave it or cut it off. If you had/have good pollination, fertiliser and watering it will produce a good size cob. I don't bother and I had 9-10
Showing 51 - 60 of 321 comments

Just separate a small part of the husk and have a look at the kernels. If they are a bright yellow and nice and plump then they are ready. Don't leave on the plant for too long after this time as the can start to dry and harden.

- 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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