How much soil do you need to refill your raised beds?-A Guest Post by Steve Pettis

This week we are excited to have Steve Pettis, UGA Extension Agent for Rockdale County, join us for a math lesson on raised bed gardening!  Steve writes….

If you have have raised beds eventually you will need to add more soil. Over time soil compacts, organic matter dissipates, and soil erodes. So, what was once a box full of soil can end up half empty.

How much soil do you need to refill your raised beds?-A Guest Post by Steve Pettis
Raised beds at Green Meadows CG

Bagged soil is sold by the square foot. How do you determine how many square feet of soil you need to refill the beds?

I would suggest using the formula for determining volume of a rectangular prism –

vol. of rectangular prism = a b c or length x width x height

Multiply the width, height and length in inches. Divide that by 12 inches to get cubic feet. Bags of soil will say how many cubic feet of soil are in the bag. Divide the number of cubic feet in a bag into the cubic feet of your space and you have the number of bags needed.

Thanks, Steve!  Happy Gardening!

Becky Griffin

3 thoughts on “How much soil do you need to refill your raised beds?-A Guest Post by Steve Pettis”

  1. 2×12 lumber is the best although 2×10 will work. The 4x4s are a good idea to secure the sides in the corners.

    Reply

Leave a Comment