Sowing and growing lettuce: Six typical mistakes you should avoid. Timing, temperature or light – when growing lettuce there are a lot of things you can do wrong, which will reduce or fail the harvest.
Sown too early: Preferring lettuce often makes sense to make the plants stronger. Wrong soil: Normal potting soil contains too many nutrients, which causes the plants to shoot up too quickly. Loamy garden soil is well suited for young plants, but root formation is inhibited in tender seedlings.