I'm going to try some raised bed gardening this year.

Trying to find inexpensive material to build the frames.

I thought I had some old lumber but not nearly as much as I thought

Was checking Lowes and they had 2X12X16 whitewood for $22 and 2X10X16 for $16

Any better suggestions?

Would 10" be sufficient?
Could I get by with 1X material?

Thank you