He installed the science carrier packed with red romaine lettuce seeds in this habitat, while the flight engineer, Nick Hague ...

Sow seeds directly into the ground or into raised beds or containers. Lettuce seeds are tiny and should be planted ...

Keep the soil moist after sowing until the seeds are growing strongly. Thin the seedlings to around 30cm apart. If you're planning to cut the whole lettuce heads at harvest, sow at intervals of three ...