sweet corn
Also known as: corn; Guinea wheat; Indian corn; maize; mealies; ornamental maize; Turkey wheat
Sweetcorn is relatively easy to grow and without a doubt tastes so much better that shop bought. There's a great range of varieties to grow, both heritage and modern, and something to suit most gardens and the shorter British summers. If you are short on space you could also try growing baby corn. Sweetcorn is generally classified into three groups. 'Normal' which is the original type of sweetcorn and seeds tend to have the most vigour - they're not as sweet as some of the newer varieties and should be eaten as soon as picked to avoid the sugar being converted to starch. 'Supersweet' which, as the name suggests, have a high sugar content but are not so easy to germinate. 'Supersweet' varieties should not be grown with other varieties as cross-pollination can result in a reduction in sugar content. 'Tendersweet' which are both tender and sweet (although not as sweet as 'supersweet') and can be grown alongside other varieties.
Scientific classification
- Species
- sweet corn (Zea mays)
- Genus
- Zea
- Family
- Poaceae
- Information to be completed
- Toxicity
- Annual Biennial
- Plant type
- 1.5-2.5 metres
- Height
- 0.5-1 metres
- Spread
- Deciduous
- Foliage
- Columnar upright
- Habit
- Spring · Summer · Autumn
- Season of interest
- Full sun
- Sunlight
- 20 – 30 °C
- Ideal temperature
sweet corn pictures
Distribution of sweet corn
Distribution map
- Native
- Introduced
- Cultivated
Source:WCVP v16 · Royal Botanic Gardens, Kew · CC BY 3.0 · Boundaries:WGSRPD / TDWG
Culture
Information to be completed
Toxicity
Information to be completed
Quick identification of sweet corn
Information to be completed
sweet corn care guide
- Keep soil evenly moist, especially during rapid summer growth
- Watering
- Full sun
- Sunlight
- 20 – 30 °C
- Ideal temperature
Watering
Keep soil evenly moist, especially during rapid summer growth
Fertilizing
Nitrogen-rich feed early, then balanced feed before tasseling
Pruning
No pruning required.
Propagation
Sow seeds undercover from mid-spring in pots or modules and then plant out May - June after hardening off and the last of the frosts have passed. Alternatively sow 'in situ' from late spring to early summer. Always plant in a grid pattern to ensure pollination. See sowing vegetable seeds
Growing
Grow in a sunny, sheltered spot in soil that has been enriched with well-rotted organic matter. Sweetcorn can tolerate many soil types but prefers well-drained soils with a pH between 5.5 and 7.0. Harvest from July to October. See sweetcorn cultivation for futher information.
People also ask
Information to be completed
Common pests and diseases
Diseases
May be susceptible to smuts which apppear as large galls on the cobs and stalks in hot weather.
Pests
May be susceptible to damage from birds, slugs, mice and badgers.
Explore the plant health library →










