抽薹是蔬菜植物从营养生长过早地转变为开花和种子生产的过程，由高温、长日照或干旱等环境胁迫引发。在生菜、菠菜和香草等叶类作物中，抽薹会使叶子变苦变硬，导致收获物变得难吃。
关键事实
- Triggered by high temperatures (above 24°C / 75°F for lettuce), long days, or water stress
- Plant shifts energy from leaf production to flowering and seed set
- Leaves become bitter, tough, and unsuitable for fresh eating
- Bolted plants develop a central flower stalk (called a scape in some crops)
- Prevention: maintain cool temperatures, use short-day or heat-tolerant varieties
- Indoor growing advantage: controlled photoperiod and temperature prevents bolting year-round