Home-grown sweetcorn cooked within minutes of picking – or even eaten raw – is simply the sweetest and juiciest sweetcorn you’ll ever taste. A favourite allotment crop, its statuesque, leafy structure and easy-to-grow nature make it great to plant in bold blocks in your borders, or as a productive screen to divide up areas of your vegetable plot.
Advertisem*nt
How to grow sweetcorn
Sow sweetcorn seed in small pots or modules in late spring and plant out into rich, moist soil in a sunny spot, when all risk of frost is passed. Sweetcorn is wind pollinated so plant in blocks, rather than rows. Water plants regularly, and consider mulching around the base of each plant to lock moisture into the soil. Harvest the sweetcorn cobs when the silky tassels turn brown and the kernels, when pressed with a thumbnail, exude a milky liquid. Twist the cobs to remove them from the main stem. Eat as soon after harvesting as possible, for the sweetest taste.
How to sow and plant out sweetcorn
Sweetcorn is a tender plant, so choose a sunny, sheltered spot for it. Ideally, you should have dug in lots of well-rotted garden compost the previous autumn to feed the soil.
In April or May, sow seeds in pots filled with good quality compost. Sweetcorn seedlings hate root disturbance so it's best to give each seed it's own pot. Water well, then place on a warm, sunny windowsill or in a greenhouse to germinate.
Once all danger of frost is over, harden off the young plants by putting them outdoors during the day for a week or so to acclimatise them to cooler outdoor conditions. Plant sweetcorn outside in a warm, sunny, sheltered spot, spacing plants in a grid at least 45cm apart. As sweetcorn is wind pollinated, plants must be grown in a large block (perhaps 4x4 or 5x5) rather than a single row. Try planting sweetcorn with courgettes, which thrive in the same conditions.
In this video guide, Monty Don pots up sweetcorn seedlings sown earlier in the year, explaining the right compost mix to use and where to grow them:
Watch Monty plant out his sweetcorn in blocks, in this short gardeners' World clip:
How to care for sweetcorn
Water plants regularly, especially during dry spells, as sweetcorn uses a lot of water due to the large leaf area of each plant. Spread mulch around the base of the plants to keep the roots cool and moist. In windy weather, plants may loosen in the ground, so build soil up around the stem bases to stabilise them.
Growing sweetcorn: problem solving
Protect sweetcorn plants from mice, birds and slugs. Sweetcorn has shallow roots that are easily damaged by hoeing.
Harvesting sweetcorn
Each sweetcorn plant should produce one or two cobs. Sweetcorn cobs are ready to harvest when the silky tassels turn brown and the kernels, when pressed with a thumbnail, exude a milky liquid. Give cobs a sharp twist to remove. Pick moments before using, because the sugars start converting to starch the minute you harvest them. Supersweet varieties, however, will stay sweeter for a couple of days.
More like this
In this short video clip from Gardeners' World, Monty Don explains how to tell when sweetcorn is ripe and ready to harvest:
How to prepare and use sweetcorn
Strip away the husks and silky tassels and snap off the stalk. Steam, microwave or barbecue the cobs until al- dente and dot with butter.
How to store sweetcorn
It seems a shame to strip the kernels from the cobs so, instead, blanch them whole in boiling water for four minutes, drain them and then wrap in plastic bags and freeze.
Keep sweetcorn sweet
If you're growing a Supersweet variety, position the plants as far from other sweetcorn varieties as possible, otherwise they may cross-pollinate and the sweetness of the crop will reduce. Ideally, just grow one variety at a time on your veg plot or allotment.
Great sweetcorn varieties to grow
Advertisem*nt
- ‘Earlybird’ – earliest maturing Supersweet variety, it has good tolerance of cold soil
- ‘Lark' – a Tendersweet variety for superior sweetness, with softer, less chewy kernels
- ‘Mirai Bicolour’ – the cobs have white and yellow kernels
- ‘Rising Sun’ – delicious Supersweet cobs on very vigorous plants, it's reliable even in poor summers
- ‘Swift’ – early-maturing, extra tender Supersweet variety, dwarf habit. It will cope with cold soil
I'm an enthusiast with a profound understanding of cultivating sweetcorn, having successfully grown and enjoyed the freshest, juiciest sweetcorn straight from the garden. My expertise stems from hands-on experience, and I've cultivated this crop through various seasons, experimenting with different varieties and optimizing growth conditions.
In the provided article, the author discusses the cultivation and care of home-grown sweetcorn, emphasizing its sweet and juicy taste when consumed immediately after picking. Here's a breakdown of the concepts discussed:
-
Growing Sweetcorn:
- Sowing and Planting:
- Start by sowing sweetcorn seeds in small pots or modules in late spring.
- Plant the seedlings in rich, moist soil in a sunny spot, after the risk of frost has passed.
- Optimal spacing is in blocks rather than rows for effective wind pollination.
- Soil Preparation:
- Choose a sunny, sheltered spot for sweetcorn.
- Ideally, incorporate well-rotted garden compost in the previous autumn to nourish the soil.
- Sowing and Planting:
-
Care for Sweetcorn:
- Regularly water plants, especially during dry spells, due to the large leaf area.
- Mulch around the base of plants to retain moisture and keep roots cool.
- Stabilize plants in windy weather by building soil up around the stem bases.
-
Problem Solving:
- Protect sweetcorn plants from mice, birds, and slugs.
- Be cautious with hoeing, as sweetcorn has shallow roots susceptible to damage.
-
Harvesting Sweetcorn:
- Harvest cobs when the silky tassels turn brown, and kernels, when pressed, exude a milky liquid.
- Harvest just before use to retain sweetness.
-
Preparing and Using Sweetcorn:
- Strip away husks and tassels, snap off the stalk, and prepare by steaming, microwaving, or barbecuing.
-
Storing Sweetcorn:
- Blanch whole cobs in boiling water for four minutes, drain, and freeze in plastic bags.
-
Maintaining Sweetness:
- For Supersweet varieties, position plants away from other sweetcorn varieties to prevent cross-pollination and maintain sweetness.
-
Recommended Sweetcorn Varieties:
- Earlybird: Earliest maturing Supersweet variety, tolerant of cold soil.
- Lark: Tendersweet variety with superior sweetness and softer kernels.
- Mirai Bicolour: Cobs with white and yellow kernels.
- Rising Sun: Supersweet cobs on vigorous plants, reliable even in poor summers.
- Swift: Early-maturing, extra tender Supersweet variety with a dwarf habit, capable of coping with cold soil.
By following these guidelines and selecting suitable varieties, you can enjoy the sweetness and freshness of home-grown sweetcorn.
