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Sweetcorn Seeds - Mainstay F1 Hybrid

  • Catalogue Code 1020-2304
  • Pack Contents: 30x Sweetcorn Seeds

Sweetcorn Mainstay F1 Hybrid is a tall, robust grower that produces 'super-sweet' cobs ready to harvest after sweetcorn Earlibird. So sweet you can eat fresh from the plant for a delicious snack. An excellent way of getting healthy vegetables into kids – this sweetcorn is sweet and colour – so appeals a lot to children.

We recommend you sow indoors from April to May for an earlier harvest. Sow ½ inch (1cm) deep in individual module seed trays of pre-watered compost lightly firm down. Place in a warm environment at around 21°C (70°F). A plastic lid over you module seed tray placed on a sunny windowsill will attain this temperature. Keep the compost moist at all times.

Plant out seedlings in June. Harden off young plants before plating out (bring the module tray outside by day and bring indoors by night) in the required harvest position 36in (90cm) apart when risk of frost has past.

Alternatively sow outdoors from May to June ½in (1cm) in their permanent planting positions. Keep soil moist at all times.

Tip - Pick regularly when fruit is 4in (10cm). Water plants regularly. Once fruits starts to swell feed with a liquid fertiliser.

How your plants arrive

Your Sweetcorn Mainstay variety arrives to you as a well-sealed packet of 30 seeds with variety and cultural information on the front and the back of the packet.

This includes the best sowing time, benefits of growing the variety, harvests time, top tips and other handy bits of information to help you to grow your crop successfully and enjoyably.

Can’t plant straight away?

If you need to wait until the advised time of sowing which is given on the packet check the ‘Best Before’ date given on the packet and keep the packet in a dry and cool place like a drawer in an unheated room or garage.


  • RHS Award of Garden Merit
  • F1 Hybrids are crossed varieties that are exceptionally vigorous and longer lasting
  • Will flower well in full sun

Growing Calendar for Sweetcorn Seeds - Mainstay F1 Hybrid

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec
Sow Indoors
Sow Outdoors

10 out of 24 germinated. They now look well


Good seeds.All sown and growing perfectly


all seeds matured except for one

Our products are all grown with the utmost care and to high standards of quality. We regularly check our nursery stock to determine exactly when they will be at the optimum time for despatch.

We despatch our fresh, nursery-grown live plants (including vegetables, trees and flowers) when they are at a stage of growth ready for you, the customer, to plant on at home.

The delivery period shown on your order confirmation indicates when you can expect to receive your order and we will endeavour to despatch your plants in this period within 7-14 days