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Fact Sheet for Sowing Seeds

Key Requirements

Horkan’s Tip: Always use clean or new seed trays to avoid disease damage on the young, developing seedlings. Wash old seed trays with Armillatox before sowing seeds.

Key Points to Remember:

  • Follow the instructions carefully, which are clearly provided on the back of the Thompson & Morgan seed packet.
  • Fill the seed tray up to half an inch from the top. Water with tepid water and Vitax Bordeaux. The fungicide will help to prevent ‘damping off’ diseases from affecting the young seedlings.
  • Sow the seeds lightly spreading them evenly over the surface area.
  • Use approximately 100 – 300 seeds per standard seed tray.
  • Lightly cover with perlite or vermiculite which will help in the germinating process and also help to keep the young seedlings from drying out.
  • Cover the seed tray with a polythene cover or cling film and place in a warm location, such as a heated seed tray or a warm widow or patio.
  • Some seeds do require light to germinate and this will be indicated on the packet.
  • Carefully examine the seed trays on a daily basis and once germination has occurred place the trays in full light in a cool but frost-free location. Remove the cling film and allow the seeds to grow on.
  • Once large enough, about 2.5cm, transplant into small containers to grow on, using Growise compost with added John Innes seed compost. Feed with One Plant Food every three weeks.
  • Plant out of doors when all risk of frost has passed.
  • Hardy annuals and perennial seeds can be sown out of doors directly into flower borders.

Horkans recommend the F1 ranges from Thompson & Morgan.

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