Flowers are covered all over with little holes called stomates.
They’re way too small to see—but they’re how the water evaporates
through the leaves and petals through a process called transpiration.
Normally, a flower planted in the ground drinks water through its roots.
But when a cut flower drinks colored water straight from the stem,
the color travels up to the stomates.
This spreads the color to the flower’s leaves and petals, and voilà!