Potting Soil Problems

Quality potting soil is often the key to successful container gardening. Although purchasing an inexpensive product may seem practical in the short term, a quality potting soil is more likely to encourage healthy plant growth and eliminate the need for pest control.

Composition

Many potting soils contain large amounts of sand, topsoil, manure or tuck peat. According to Home Depot, gardeners should avoid these products, which may contribute to drainage problems and soil compaction. Choose potting soils with at least 10 to 15 percent perlite for maximum drainage and aeration.

Nutrient Content

Quality potting soils may contain additional nutrients that attempt to mimic soils in nature. Nutrient-poor potting soils will result in stunted growth and may increase the risks of diseases and insect pests. Consider taking a soil sample to determine your soil nutrient content, as well as pH levels, which influence nutrient uptake.

Harmful Pathogens

Some potting soils may contain harmful bacteria and pathogens. According to the University of Vermont, soil-less potting mixes contain the least amounts of potentially harmful pathogens. Pasteurizing your soil is another way to minimize pathogens in soil. Moisten the soil, then place it in a pan and heat to 180 degrees Fahrenheit and let it remain at this temperature for 30 minutes. Allow the soil to cool completely before using it.

References

• Maine Organic Farmers and Gardeners Association: The Dirt on Potting Soil
• University of Vermont Extension: Organic Potting Mixes
• Home Depot: Potting Soils
• Purdue University Extension: Container and Raised Bed Gardening