14/06/2026
Growing Sweetcorn
Grow from seed indoors in late April to mid May and only plant into final position when plants are about 6” tall and risk of frost has passed
Sweetcorn in air pollinated so plant in a group rather than a long row so each plant is surrounded by several near neighbours, so the chances of successful pollination (resulting in a cob packed with kernels) is much greater, Poor pollination leads to sparsely filled cobs with missing kernels.
The exception is when growing baby corn varieties – with these, the female flowers shouldn’t be pollinated, otherwise the kernels will start to swell, so plant these in rows.
Space plants 13–18”apart, depending on the variety, but with baby corn, plant 20cm (8in) apart.
Don’t plant ‘supersweet’ with standard sweetcorn varieties nearby, as cross-pollination can reduce their sweetness.
Keep checking for growth and kernel formation and pick and use immediately they are ready. Do not store for long periods as they will deteriorate rapidly.