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 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

06 Jan 25, (USA - Zone 8b climate)
2-3 weeks after last frost.
05 Jan 25, (USA - Zone 5b climate)
Look up the planting guide for your area.
20 Oct 24, K-M Bourke (Australia - sub-tropical climate)
I never have much success growing from seed but I really want to level up my gardening. How much sun do I allow my seedling trays to get. In a sub-tropical climate the sun can be very intense on hot days and can dry them out very quickly. Should I use a greenhouse or is that too shady? How often should you water them? I assume the trays should be moist the whole time while they are germinating? Any advice would be appreciated.
28 Oct 24, Anonymous (Australia - sub-tropical climate)
Soak the seeds over night in a bowl/glass of water. Plant them into a fine potting mix soil. Give them a watering.. Don't water for 2-3 days. Keep in the shade or only a little sun each day. If soil drying out use a spray bottle to moisten the top of the soil. Or do similarly into the garden. Put some shade over them. Don't over water - they will rot. I have had trouble myself the last few years. Or just buy punnet from Bunnings/? - a lot simpler and easier.
16 Nov 24, (Australia - sub-tropical climate)
Continued - I bought some from Bunnings - tasted horrible.
13 Oct 24, Eugene (Canada - Zone 3a Temperate Short Summer climate)
What’s the best sweet corn to grow in zone 3a
28 Oct 24, (Canada - Zone 5a Temperate Warm Summer climate)
Try a few and then grow the variety you prefer.
26 Apr 24, Natalia (USA - Zone 5b climate)
I don't have much space... has anyone had success with growing corn in a large raised bed? Thanks!
02 May 24, Brett (Australia - arid climate)
Corn takes a fair bit of water so keep the drink up to them. They do have a pretty good sized root system so it would depend on the depth of the raised bed. I've grown them OK in 600mm deep beds.
18 Jan 25, Melissa (USA - Zone 9b climate)
Would they do well in a 3 foot or 914 mm bed?
Showing 11 - 20 of 432 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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