On a mild spring day in the yard, dandelions sprout amid the grass with bright yellow flowers. Weed killer spray comes out, aimed directly at the weeds. The nozzle hisses as liquid coats the broad leaves and stems thoroughly.
Immediately after, the dandelions show no change. The flowers stay perky, leaves remain green and firm. The spray dries in minutes, leaving the plants looking exactly as before.
Days turn into a week. Rain falls, the lawn gets mowed, and sunlight continues. The dandelions stand in their spots, unmoved and unaltered amid the routine.
Then, after 10 to 14 days, a shift appears. Leaves curl at the edges, fading to yellow then brown. Flowers droop and shrivel. The stems weaken, and the plants slump into brittle remains.
The spray's work stayed hidden underground, traveling through roots over time. The full outcome surfaces weeks after the spray touched the leaves, revealing what began that day.