28/04/2023
Myth busted: You don't need to put gravel in the bottom of plant pots! 😱 That's right, gravel in the bottom of plant pots does not improve drainage.
After watering, most of the water will drain out through the holes, whether you have gravel or not. But, because of the way the growing media interacts with water, the bottom part of your media wants to stay extra wet and gravity isn't enough to pull this extra moisture down and out through the holes--this is called a perched water table. Gravel won't help the water drain from the perched water table. The gravel just moves the perched water table up higher in the pot closer to plant roots.
If you want to prevent holes from clogging or leaking growing media, try a broken terracotta pot, paper, or square of wide mesh.
Read more about how gravel in the bottom of pots can contribute to saturated soils: https://extension.unl.edu/statewide/dodge/the-hard-truth-about-rocks-at-the-bottom-of-planting-containers/?fbclid=IwAR3W818iq9jundc7srU8BgNTT9HXSrJEcHlabukpJsAp4bsD0TpHjBND2z8
Image text:
Title reading "Myth busted: Gravel in plant pots does not improve drainage" two side-by-side pots with identical plants and roots growing towards bottom of the pot. In one pot, a blue layer of wet soil sits at the bottom of the pot. In the other, a blue layer of wet soil sits atop a layer of gravel, moving it up so roots are touching the wet soil. Text reads: The wettest soil is at the bottom of the pot. and Gravel moves the wettest soil up in the pot, closer to the roots, which can lead to rot (bad for plants). That's right! You do not need to put grave in the bottom of your pots.