Bolting

Bolting is the rapid elongation of the floral axis, resulting in the production of seeds. It is usually triggered by environmental stress, most commonly high temperatures or changes in day length.

Crops prone to bolting include lettuce, spinach, coriander, and brassicas. Once a plant bolts, its energy is redirected from producing the edible parts (leaves or roots) to producing seeds, often causing the leaves to become bitter and tough.