All about growing Kale from seed

Growing Guide

Kale is easy to grow, good looking and productive, providing both mini salad leaves and tasty greens for cooking or adding to smoothies. It’s particularly valuable in winter, providing fresh leaves in even the coldest weather.

Direct sow outdoors into final position for growing, or in a well prepared seedbed for transplanting to their final positions later on. Sow at a depth of 1cm and distance of 25cm between rows. Kale is often sown in a seedbed, then later moved to its final growing position because it is slow to grow and takes up space during the peak growing period.

Kale plants can be transplanted to their final positions approximately 5 weeks from sowing (or later noting above). When transplanting kale, plant it slightly deeper in the ground than it was in the seedbed.

Plant kale at a distance of 60cm apart and cover with a protective netting or fleece to prevent attack from birds and insects. Water the plants thoroughly after planting. Prepare the soil in early spring by adding plenty of well rotted farmyard manure to the soil to improve its structure and fertility. Apply lime to acid soils to reduce the acidity and lessen the risk of clubroot.

  • Key Information

    Height: to 90cm

    Spread: to 60cm

    Hardy annual

    Sun or semi-shade

    Germination: 4 - 7 days

    Harvest: From 11 weeks

  • Sowing & Growing Schedule

    Sow Indoors: n/a

    Sow Outdoors: March to May

    Plant Out: n/a

    Harvest: July to March

  • Varieties we recommend

    Nero di Toscana

    Red Russian

Top Tip

Kale leaves are best used when freshly picked. However, they can be blanched and then frozen to store for later use.Start to harvest young leaves from the top of the plant from September onwards. Side-shoots are formed after the main crown is harvested and these are ready for use in February and March. Pick shoots that are 10–15cm long and still young.

For salad leaves Kale can be sown indoors all year round. Harvest 30 days from sowing during summer and up to 60 days during winter.

Tall varieties should be supported with a sturdy bamboo cane, especially in exposed sites. This will prevent winter gales buffeting these top-heavy plants and potentially loosening the roots.