A pumice wick is just a tray full of pumice stones in the bottom of your planter. Pumice stones wick water up into the soil, so by saving a little water from running off as waste, and letting the pumice stones do their magic, you will conserve at least 50% on water.


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The yellow line around the pumice stones represents a water-tight tray holding pumice stones and water. When the planter is watered from above, the tray fills, and because any overfill escapes over the top edge of the tray and out the drain holes in the planter.

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Water as you would normally - from above. Some water is collected in a reservoir (the pumice wick) and is saved from running off as waste. Pumice stone will slowly wick the water from the reservoir into the soil via capillary action, until the reservoir has been completely drawn down to empty.

THE ROOTS DO NOT ROT

The pumice stone has plenty of air spaces between the individual stones in the wick, and air is contained within each the stone itself. A pumice wick is never stagnant because there is constant movement of air and water within the wick and so roots are not deprived of necessary air. Over the course of the growing season the roots will grow down into the reservoir, all through and around the pumice wick, and remain completely healthy.

Special Note
A pumice wick will work just as well in planters with no drain holes at all, such as fine china, pottery or glass. Overfilling then becomes a matter of being careful to only add enough water to full the reservoir and no more.