No soil? No problem

WHAT MAKES UP A SOIL-LESS POTTING MIX?

- Wilson Wong

Manufacturers of soil-less growing mixes incorporate coarse, inorganic gritty components such as vermiculite and perlite to aerate the mix and improve drainage.

Other inorganic components that can improve porosity are coarse sand, pumice, volcanic sand and zeolite. Finely chopped pine bark, an organic material, is sometimes used as well.

Gardeners can select from this range based on their price, availability, weight, pH levels, and nutrient and moisture retention.

THINGS TO NOTE ABOUT SOIL-LESS GROWING MIXES

When you buy a new potting mix, figure out how much water it can hold by putting a sample in a flowerpot and watering it thoroughly.