• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Sterilizing Soil

Save money and your plants from disease by growing in pathogen-free potting mix. 

Purchase and use a pasteurized potting mix to avoid introducing disease, weeds, and insect problems to houseplant and outdoor container gardens.

Some gardeners like to make their own mix and pasteurize the soil themselves.   This can be fun, but a smelly process.  So you may want to do this on the grill or a warm day when you can open your kitchen windows.  Simply place soil in a 3 to 4 inch deep pan and set in a preheated oven at 200 degrees.  Use a meat thermometer to measure the soil temperature

When the temperature reaches 160 degrees, turn off the oven and leave the soil inside with the door closed for another 30 minutes.

Simplify the process by using a medium-sized baking potato to measure soil temperature.  Place the potato in the middle of the soil to be pasteurized.  Once the potato is done so is your soil.

A bit more information:  Pasteurization removes most of the harmful organisms and weed seeds from the soil.  Sterilization kills everything, including good organisms.  When a pest moves into a sterile soil mix there are no good organisms left to potentially keep this pest in check.  Store pasteurized soil in a clean container with a lid.  Don’t mix treated and non-treated soil.  This will undo all your work.

Related

Upcoming Appearances


May 13, 2021
Planting Your Rain Garden
Webinar

May 16, 2021
Perennials for Challenging
Growing Conditions

Webinar

May 21-23, 2021
NARI Milwaukee Spring Home Improvement Show
In-person Appearance

June 3, 2021
Creative Container Gardening
Webinar

June 9, 2021
Sustainable Lawn & Landscape Care
Webinar

June 10, 2021
Gardening During the Summer Months
Webinar

Register today! Plus, watch Melinda's past webinars ON DEMAND
for a limited time.

Learn More

Book an Appearance

Learn More

Win Plantskydd Animal Repellent package

ENTER NOW