Plunge Watering is an emergency measure used to water plants that have been allowed to dry up, but it can also be used to check whether the soil of a plant is saturated/wet enough.

How ToEdit

Completely submerge the pot in lukewarm water for 10 minutes. If lots of bubbles dissipate from the soil, then the plant has very dry soil. If hardly any/none do this, the soil is wet enough.