A commercial, "non-soil" potting mixture that has built-in slow-release
fertilizer and water-retaining crystals is a good choice. My window boxes
get "Premier Pro-Mix" for containers. I've used the Miracle-Gro
potting/container mix, too.

-- pelirojaroja


"MOLLOYRO" wrote in message
...
Please tell me a good mixture for window boxes
in zone 5. Thanks, Rosie