If you want to harvest lettuce seeds from romaine lettuce, the plant needs to bolt and form flower stalks. Romaine lettuce planted in spring may start to bolt in the heat of midsummer, however ...

Some of the more popular types of hydroponically grown lettuce include the commonly grown butterhead lettuce, robust and crispy romaine ... the new stalks since it can easily kill the plant.

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