When you go to purchase potting soil, chances are good that many of the potting soil mixes in bags are also marketed as being sterilized potting soil. But do you really need the added expense of sterilized potting soil, and what exactly does it mean?
Sterilized potting soil means it has been heated in order to kill any bugs, seeds (such as from weeds) and any other pests within the soil that can harm or kill your plants.
It is also worth noting that sterilized soil is sterilized in a particular way so that the “good” organisms that are healthy to plants are still intact within the soil.
If you are planting in containers, it is recommended you use sterlized potting soil. This provides an ideal growing environment for your plants. Sterilized soil is also recommended when you are planting seeds and seedlings, when plants are at their most delicate and vulnerable state.