If you grab live plants from a pet store, and give them food such as fish food (I've also heard about yeast? Idk.) they'll grow and flourish. They always seem to pop up in my breeding tanks so I never had to worry about it.
For my fry I have:
Microworms. I get a culture, and keep it going.
Decapsulated BBS: This stuff isn't live, but I shipped it in from ebay :)
Daphnia: I usually have they skulking in my breeder tank when I have live plants!
Frozen mini-bloodworms: for when they are bigger!!
Hikari first bites: to transition them into the small-adult world :)
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.