Summer lettuce is not a specific variety of lettuce. Rather, it is the generic term for lettuces that tolerate the heat better than the others. Generally speaking, lettuce is a cool-weather crop that tends to bolt. Bolting is the plant’s survival mechanism to sun exposure and hot temperature, which usually starts at 80ºF. The plant quickly produces flowers and seeds, making the leaves bitter and eventually abandoning its growth. But, this doesn’t mean that we can only grow lettuce in spring or fall. Summer lettuce consists of heat-tolerant cultivars that can be planted during the summer season, provided that they will be planted in shady areas. Good locations include near a sun-blocking building, under a shading cloth with rolled up sides for air circulation, or beneath tall crops like pole beans and corn.
Species: L. Sativa
Binomial Name: Lactuca Sativa