Sow two or three seeds per module, then remove the weakest seedlings
PHOTOS: NEIL HEPWORTH; AMANDA RAWLING
If you haven’t already, order seeds now for plentiful tomatoes in summer. Check that descriptions mention ‘suitable for outdoors’ and that they are disease or blight resistant. Be realistic about the number of plants you have space for; a few high-yield varieties can go a long way. Cordon tomatoes (called indeterminate) grow up stakes or other supports, making them space-efficient but susceptible to strong winds, while bush tomatoes (often called determinate) are shorter in stature but more sprawling.