When you flood the mate, you add water over your mountain of mate and immerse all of the yerba. This is an alternative to bombilla hemisphere switching and, if done properly and at the right time, can be just as effective in prolonging the cycle length of your mate.

Learn more yerba mate gourd techniques:

Unplugging the mate

Caring for your mate gourd

How to deal with mold in your mate gourd

Selecting a wooden yerba mate gourd

Gourd cycles explained