About 7.5 gallons.

Al

How many cubic feet is "about 7.5 gallons".
(I have twelve 12" x 12" x 12" containers to fill)

Unless I'm missing something...that would be 12 cubic feet, yes? 12 containers, each a foot cubed.

Josh

7.5 gal(US Dry) = 1.16667 cubic ft
12 containers * 1.116667 cubic ft = 14 cubic ft.

I think that's why Al gave the approximation (~about 7.5 gallons).

If your containers are true - inside diameter - 1 foot high, wide, and deep,
then the volume should be constant.

That said, here's a safe plan of action. Make extra.

I always make slightly more than I think I'll need.


Josh

I would think a half yard would be about right. Al

I always make a little more than I think I'll need, and I keep it in a covered bucket/container... you never know when you will run across a cutting or a small gift plant that you'll want to pot or re-pot.