"T Bentley" wrote:

Is there any reason as to why I cannot cut down and put compost in 1 pint
plastic milk cartons, since their rectangular shape means I can get more on.

No problem at all; on this side of the pond milk cartons are cardboard with
some sort of plastic coating. I nip off the 4 bottom corners and the top
with a serrated knife, fill with potting mix and have at it.
I use SWMBO's half-pint cream cartons for small plants, and half-gallon
milk cartons for nice big tomato plants.

--
Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic
Zone 5/4 in upstate New York, 1420' elevation. NY WO G