I have Googled biodegradable pots and found many things made from grains and bamboo.
I have yet to find a price for some reason.
I can’t imagine how much work it would take to make that many pots from newspaper though it is a good idea.
One thing you will have to consider is a professional look to the pots.
Its strange how folks are when it comes to packaging, I know people that won’t order from a catalog that doesn’t have pretty glossy photographs to look at.
Even though they know what it looks like anyway, they will order from a fancy catalog and pay a LOT MORE MONEY!!
Maybe sell them on the tomatoes first and then an environmentally friendly pot later.
Just my thoughts on the matter.
Worth