Growing from seed: a good start for young plants

Plan the growing space before sowing

What would you like to harvest or enjoy later? Check the seed packet for sowing time, germination temperature and light requirements. An early indoor start does not benefit every species. Allow space for the larger seedlings too. Clean containers with drainage, suitable seed compost and clear labels help you keep track of the project.

Sow at the right depth

Moisten the compost evenly before filling the containers and leave space between seeds. Sowing depth depends on the species: seeds that need light require different treatment from those that should be covered. Firm gently and water without washing seeds away. A cover helps retain moisture, but you still need to check conditions underneath it.

Give emerging seedlings enough light

Once seedlings emerge, check moisture and ventilation daily. Constantly wet compost and humid, still air favour problems. Long, thin stems may indicate insufficient light. Improve the growing position first. A bright position must also suit the crop's temperature requirements; direct sunlight can overheat a covered propagator even when the surrounding room feels comfortable.

Prick out and grow on

If seedlings become crowded, prick them out when they are large enough to handle. Hold a delicate seedling by a leaf rather than its stem and preserve as much root as possible. Choose a pot that suits the root system. Feeding needs depend on the species, growth and the nutrients already included in the growing medium.

The move outdoors

Introduce indoor-raised plants gradually to wind, sunshine and cooler temperatures. Start in a sheltered position and increase their time outside. Plant out tender species only when local conditions and weather are suitable. Afterwards, check moisture in the original root ball: it may dry out even while the surrounding soil still looks moist.

Frequently asked questions