Seed Sowing - Step by Step

Beginner gardening · UK guide

Seed sowing

Step-by-step advice for choosing seeds, preparing the soil, sowing successfully and caring for young seedlings.

Sowing seeds is one of the simplest and most rewarding ways to grow plants. Whether you are using a garden bed, greenhouse, container or windowsill, a few basic steps can give your seeds the best possible start.

How to sow seeds step by step

1. Read the seed packet

Check the recommended sowing months, depth, spacing and whether the seeds should be sown indoors, outside or under cover.

2. Choose the right place

Most vegetable seeds need light, warmth and moisture. Choose a sheltered position with enough sunlight for the crop you are growing.

3. Prepare the soil

Remove weeds and stones, break up large lumps and create a fine, crumbly surface. Avoid sowing into soil that is very wet or compacted.

4. Make a shallow drill

Use a cane, ruler or your finger to make a shallow line in the soil. Follow the seed packet for the correct depth.

5. Sow the seeds

Place the seeds carefully and try not to sow them too close together. Crowded seedlings compete for light, water and nutrients.

6. Cover gently

Cover the seeds with fine soil or compost and press the surface gently. Do not bury small seeds too deeply.

7. Water carefully

Water gently using a fine rose on a watering can. A strong flow of water can wash seeds away or expose them.

8. Label the row

Write down what you have sown and the date. Labels are especially useful when seedlings begin to appear.

Do not sow too much at once

Sowing smaller amounts every few weeks can give you a longer harvest. It also prevents you from ending up with more vegetables ready at the same time than you can use.

Sowing indoors

Use clean containers

Use seed trays, pots or recycled containers with drainage holes. Clean containers help reduce the risk of disease.

Use seed compost

Seed compost is finer and lower in nutrients than ordinary compost, making it suitable for delicate young roots.

Give seedlings enough light

Place seedlings somewhere bright. A lack of light can make them tall, thin and weak.

Harden plants off

Before planting young plants outside, gradually expose them to outdoor conditions over several days.

Common seed-sowing problems

Seeds do not germinate

Check whether the soil was too cold, too wet or allowed to dry out. Old seeds may also have a lower germination rate.

Seedlings become leggy

This usually means they need more light. Move them somewhere brighter and avoid overcrowding.

Seedlings collapse

Overwatering and poor airflow can cause young seedlings to rot at soil level. Water carefully and avoid overcrowding.

Seedlings disappear

Slugs, snails, birds and mice can all damage young plants. Protect seedlings where necessary.

Seed-sowing checklist

  • Check the seed packet instructions.
  • Use suitable soil or seed compost.
  • Sow at the correct depth.
  • Water gently.
  • Label what you have sown.
  • Keep the soil evenly moist.
  • Give seedlings enough light.
  • Protect young plants from pests.
  • Thin seedlings if they become overcrowded.
  • Harden off plants before moving them outside.

Every garden starts with a seed

Do not worry if every seed does not germinate perfectly. Sowing is a skill that improves with practice. Start with a small number, observe what happens and try again.