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
T                 T T T
                P P P  

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

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • P = Sow seed

September: sow after risk of frost

  • 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 09, corey (Australia - temperate climate)
first time grower how do i tell if my corn is ready
22 Jan 09, Colleen (Australia - temperate climate)
Willo, thanks for your response. Will hope for better results next time following your advice.
20 Jan 09, willo (Australia - cool/mountain climate)
Colleen, the shallow soil shouldn't be a problem as sweetcorn has a fibrous root system and is shallow rooted. The most important thing is too keep the moisture up and keep them well mulched if soil is shallow. If cobs are small due to not all kerels developing, this due to lack of pollination. Follow the instructions on the site and plant in blocks. Regards.
16 Jan 09, Colleen (Australia - temperate climate)
My sweet corn seemed to go well at first but most of the cobs were undersized. It was growing in a shallow no dig garden, could depth of soil be responsible?
09 Jan 09, Grahame (Australia - temperate climate)
Mikal, there is no problem planting your corn now. Yig, I doubt your corn will do as well in pots as in the ground. Pauline, The corn needs to ripen on the plant before you pick it.
06 Jan 09, mikal (Australia - temperate climate)
hi my name is mikal and i want to start growing corn my freinds have told its a month late will they still grow p.s its january
21 Jan 20, Robert (Australia - temperate climate)
11 years... I'd like to know this also...
01 Jan 09, yig (Australia - temperate climate)
can you grown them in pots and still get the same quality as growing them in the ground?
Showing 321 - 328 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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