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
        P P            

(Best months for growing Sweet corn in USA - Zone 5a regions)

  • 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.
  • A seedling
  • A young corn plant
  • Feathery cobs on side of stem. Male flowers at top.

Plant in 4 by 4 blocks to encourage germination Pick when the silky threads on the cobs turn brown or black. Part the top of the leaves and test for ripeness by pressing a grain with your fingernail. If it is milky, it is ready.

Early varieties ripen quickly and are sweeter when just picked.

Avoid planting coloured maize ( for drying) near sweetcorn as they will cross-pollinate and spoil the cobs on both.

Culinary hints - cooking and eating Sweet corn

Pick and cook within an hour. Remove the silks and outer leaves.
Best flavour if microwave about 4 minutes per cob.
Can be barbequed wrapped in foil
Cook large amounts in a stock pot until test soft.
Sprinkle with black pepper and dip in butter.

Your comments and tips

04 Jun 23, German Martinez (USA - Zone 8b climate)
What’s the best soil either potting mix or soil mix outdoors for growing corn from seeds
25 May 23, Renee Bowman (USA - Zone 9b climate)
Something is eating my corn stalks leaves leaving holes in them and inside center of stalks looks like wet corn meal or mash can it still be salvaged and what could be causing this? How do I prevent and stop this infestation?
01 Jun 23, (USA - Zone 9b climate)
Check for big grubs.
08 Mar 23, harvey (USA - Zone 11b climate)
What organic corn varieties and organic soybean varieties grow well in climate zone 11A-11B?
31 Dec 22, William (USA - Zone 7a climate)
What is the recommended type sweet corn to grow in zone 7a?
05 Jan 23, Anonymous (USA - Zone 5a climate)
More about finding a variety you like. Some corns are starchy and some really sweet.
20 Nov 22, Pam Thies (USA - Zone 9b climate)
Zone 9b can corn be started in ghse. and transplanted into outside raised bed?
04 Dec 22, (USA - Zone 9a climate)
Transfer when about 6' high.
19 May 22, Mike (USA - Zone 9a climate)
How much 33-0-0 Nitrate should I use on my sweet corn per 100 ft of row? My rows are pretty big, so I would say the corn is at least 2 feet apart from row to row. That said should I plant at the bottom of the rows, or closer to the plants? Thanks.
24 May 22, Anonymous (Australia - sub-tropical climate)
Is the 33-0-0 the NPK of the fertiliser? If so I would use a more balanced fertiliser 12-15N, 3-6P, 8-15K. Grow your corn to about 1.5 feet and then run a handfull down each side covering about 4-5' with each handfull. Then hill the soil up around the plants - new roots will grow and help stabilise the plants. If you want to fertilise before planting don't use 33N - it will burn the roots of new germinating plants. Spread the fertiliser over about 1' of the row width and rake/dig it into the soil before planting seeds.
Showing 1 - 10 of 27 comments

I am coming to the end of my Corn harvest. I have noticed that the corn is now poker dotted with white & yellow corn. All of my corn is from the same seeds I just staggered the planting to have corn for longer. Also the caterpillars are more frequent as are the gaps in the corn. Are all these normal for end of season "problems"?

- Wendy Wong

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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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