The Three Phases


The Wet Phase

In winter, vernal pools swarm with aquatic life, most smaller than a freckle. Frogs and toads come to mate and lay eggs. From November through March, species race against the clock (and their predators) to grow up, mate and lay eggs before the pools dry up.

Many vernal pool seeds sprout in November with the first winter rains. The seedlings remain less than two inches tall throughout the winter as the pools fill with water, submerging them for weeks or months.


The Flowering Phase

As the pools dry down in March, the seedlings grow, springing into bloom during April and early May. Most grow to less than six inches high. Vernal pool flowers create colorful rings, patches and ribbons of yellow, white, pink and purple.

The displays change from week to week, as each species gives way to the next, like a floral kaleidoscope.


The Dry Phase

During the hot, dry summer months, vernal pools lie brown and barren among the grasslands. Birds, mammals and insects come to the pools to feed on the seeds and bulbs of vernal pool plants. While they are there, other species feed on them.

The sun-baked bottoms of the vernal pools hold the eggs, cysts and seeds that will give life to the next generation. The winter rain awakens them, restarting the cycle each year.