Answer: Yours is an interesting question and one that many people ponder over. When we plant lettuce seeds, we expect to harvest leaves in a few weeks. Because we prefer to eat young, tender leaves, we generally harvest when the plant is still immature. If lettuce plants are allowed to mature completely they will form a flowering stalk which emerges from the center of the plant. This stalk develops 10-25 individual flowers, and each flower will produce one seed.
When lettuce is grown under cool conditions, such as spring or autumn, it takes a long time for a flower stalk to develop. But lettuce growing in cool spring weather can suddenly 'bolt', or go to seed, when warmer summer weather arrives. Once a lettuce plant has developed a flower stalk the leaves become tough and bitter, as the plant puts all of its energy into producing seed.
Hope this answers your question!
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