Vegetable Container Gardening
Q.

Re-Using Potting Soil

Zone San Francisco | Mila added on October 2, 2011 | Answered

I'm growing herbs and veggies in containers. Can the potting soil be re-used for the next batch of seeds?

A.
A.Answers to this queston: Add Answer
Heather
Certified GKH Gardening Expert
Answered on October 6, 2011

It can, but you need to be aware of 2 things. First, the nutrients in the soil will have been depleted, so you will need to replace those with either adding fertilizer or compost. Second, old potting soil can harbor pests and disease, so it is best to sterilize it before reusing. Here is an article on sterilizing soil:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/sterilizing-soil.htm

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