How Much Cactus Soil Do I Need For My Pot?

“How many bags of Cactus Soil will I need to fill up a 4.5-gallon container that measures 20″ x (top) x 8″ at base x 10″ deep. I am taking my barrel cactus out of the ground and planting them in this container. Can you suggest a good draining pot? Thank you for your time.” Debra of Nevada

Answer: This is the perfect job for our retail bag to pot calculator. It allows gardeners to determine how many bags of mix will be needed to fill a pot. Another easy tool to try is a gallon to cubic foot conversion calculator.

For our tool, you must answer the following:

Step 1: Select your container and size. (We provide this information.)

Step 2: Use the keypad to enter the number of containers of your size. (Make your choice, but your exact pot size is not in the calculator. I made a good guestimate by choosing a pot of the closest size.)

Step 3: Choose your bag size. (Black Gold Cactus Mix comes in 1 CF and 8 QT sizes, information that you can find on the product page.)

Our calculator and the gallon-to-cubic-foot calculator determined that 1 CFL bag of Black Gold Cactus Mix will be needed to fill the pot.

We also recommend that you read our article about Planting a Golden Barrel Cactus Safely. It has super tips from cactus expert, Maureen Gilmer!

I hope that this helps!

Happy gardening,

Jessie Keith

Black Gold Horticulturist


Plants are the lens Jessie views the world through because they’re all-sustaining. (“They feed, clothe, house and heal us. They produce the air we breathe and even make us smell pretty.”) She’s a garden writer and photographer with degrees in both horticulture and plant biology from Purdue and Michigan State Universities. Her degrees were bolstered by internships at Longwood Gardens and the American Horticultural Society. She has since worked for many horticultural institutions and companies and now manages communications for Sun Gro Horticulture, the parent company of Black Gold. Her joy is sharing all things green and lovely with her two daughters.

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