“Black-seeded Simpson” is a loose-leaf lettuce variety, as such, it grows loose leaves along a central stalk. The leaves can during the growing season by the larger outer leaves from the stem and allows the inner leaves are harvested to mature. “Black-seeded Simpson” tolerates cold, heat and drought, making it an easy to grow variety.
Flowering signals that the salad is entering the reproductive phase, the fourth and final stage of growth. The center stem grows quickly into a flower stem and the flower stalks, flowers and then seeds. At this point, the growth cycle, stop nutrients go into the formation of tasty leaves and are instead directed to seed production. The flowering process causes the previously juicy lettuce leaves too tough and bitter.
Lettuce requires short days in order to grow, is the one thing that makes it for spring and fall crops. Once a sufficient number of hours of daylight is reached, the lettuce starts to bolt, or flower. Lettuce that receives too much light screws prematurely, this can happen with the excessive use of grow lights. Prolonged heat and drought cause already screwing and destruction of salad crops.
Preventing Premature Bolt
The best way to prevent the screw is, the salad in the spring planting, when soil temperatures reach 40 degrees Fahrenheit and daytime temperatures of 45 to 75 degrees Celsius. If the soil is sufficiently moist important, because lettuce is nearly 95 percent water, it needs an inch of rain or irrigation per week to keep it going. Propped up for the salad at the end of the production with a leaf to shade with inserts will also stop pin; next planting taller plants such as tomatoes or peppers to it on warmer days can also help to shade.
What to do
You have two options once your lettuce flowers. The first is to harvest the lettuce and either eat or discard if you do not like the taste. When washed and in the fridge for a few days, some might subside bitterness in the taste, so that it is edible. You can also use the full salad seed and then collect the seeds for future planting. This practice is difficult since collected seeds which is more than one year old can not germinate normally. It is best to start with fresh, purchased seeds in the spring, then collect seeds from your harvest and use them for fall planting.