If you're clearing out old planters when used soil, don't toss that soil! It may no longer be rich in nutrients, but it still has a lot of uses.
9 Brilliant Ways To Reuse Old Potting Soil Instead Of Tossing It Out

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If you're clearing out old planters when used soil, don't toss that soil! It may no longer be rich in nutrients, but it still has a lot of uses.