WRT early planting. Green peppers, tomatoes, egg plant, yes start early. Cucumbers, squash, can start early, but the gains are marginal over simply waiting and direct seeding. Melons, don't know as never tried. Would suspect the results would be similar to that of squash.
As far as the peat moss is concerned. IMO it would probably work, but why go to that much effort and try to use a marginal potting medium. To start with peat moss tends to be very acidic and most garden plants do not like that. This year I did use potting soil, and then covered the seeds with a light sprinkling of Michigan peat. They did just fine. Also, I have an artificial peat bog in my yard. All kinds of seeds come up as volunteers in that 100% Michigan peat environment. So would be surprised if the peat would not do just fine as a starter. If you are bold, experiment. If conservative, then follow the board advice and use a more appropriate seed starting mix.
Last edited by hendi_alex
on Sat Apr 04, 2009 11:59 am, edited 1 time in total.
Eclectic gardening style, drawing from 45 years of interest and experience. Mostly plant in raised beds and containers primarily using intensive gardening techniques.