A reliable performer in British summers, Sweetcorn Northern Extra Sweet is especially suited to cooler northern districts. One of the earliest maturing of the 'supersweets', Sweetcorn Northern Extra Sweet produces good quality, well filled cobs up to 20cm (8in) long. Sturdy plants but growing only to 150 to 180cm (5 to 6 feet) tall.
Sow seeds April to May. Sow seeds 4cm (1½in) deep in 7.5cm (3in) pots of free draining compost. Place in a propagator or seal container inside a polythene bag and place at 18-20C (64-68F) until after germination which takes 7-10 days. Do not exclude light, as this helps germination.
Can also be sown direct outdoors once the soil has warmed, sow 2 seeds 5cm (2in) deep, 23cm (9in) apart, and in rows 45cm (18in) apart. Thin out to the strongest seedling.
Gradually acclimatise to outdoor conditions for a few days before planting out after all risk of frost.
Keep well watered, and mulch during dry periods.
A typical sweetcorn cob contains less than 100 calories. Cobs are gluten-free and are a good source of fibre and Vitamin B.