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 P  

(Best months for growing Sweet corn in South Africa - Summer rainfall 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 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.
  • 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

14 Feb 24, gugu dlamini (South Africa - Summer rainfall climate)
CORN701 does not grow in the ground I tried several times, it grew once after that it doesn't. Second time seeds became big and never progressed in the ground.
23 Jun 23, John dodgson (South Africa - Semi-arid climate)
When did they start growing corn in the wester Cape?
17 May 23, Jessica (South Africa - Summer rainfall climate)
Hello. When can I grow sweet corn in Botswana?
19 May 23, (South Africa - Summer rainfall climate)
Find your climate zone and check the planting guide.
10 Jan 23, Wessel Naude (South Africa - Summer rainfall climate)
Hi there.Can i still sow sweetcorn in January
21 Jun 23, (South Africa - Summer rainfall climate)
greetings. can see you farming sweet corn . can you whatsapp me on +27630965740. need also some information how to go grow it as well
13 Feb 23, (South Africa - Summer rainfall climate)
Sept to Nov
28 Oct 21, Mike (South Africa - Semi-arid climate)
Can I plant sweet corn on dryland/with rain?
31 Oct 21, (South Africa - Summer rainfall climate)
Corn needs plenty of regular watering - like each couple of days.
01 Sep 20, MARIO (South Africa - Dry summer sub-tropical climate)
Hi, Would you know where I can buy some white maize seeds in Cape Town? Do think they will grow here without any problems? Many thanks, Mario
Showing 1 - 10 of 28 comments

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.

- Mike

Please provide your email address if you are hoping for a reply


All comments are reviewed before displaying on the site, so your posting will not appear immediately

Gardenate App

Put Gardenate in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join 60,000+ gardeners who already use Gardenate and subscribe to the free Gardenate planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About Gardenate | Contact us | Privacy Policy

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.
We cannot help if you are overrun by giant slugs.