If you are interested and will pay shipping, I can give you a big handful of floating plants, will include, Asian bogmoss, salvia(of some kind), and dwarf water lettuce which grows some really long light green roots. Bettas love them...my males lounge between them and taller plants...which you might get to!
The duckweed will be the tiny little round plants that stick to your hand and walls of tank...sorry, but they like my tanks, too. :)
The floaters do well with any light, but better with a plant bulb or if you can afford(walmart sells 2pk for 10$ here) a 6500k mini fluorescent bulb...think its 10watts...I have one in my 2.5 mini bow, and plants are very happy!
No diseases or infections in my tanks for last 4-6mos so should be ok, but can dip in potassium permangate solution or mild bleach or just quarantine with water changes.
Anyway, let me know! (if I can send a plant, it will be low maintenance like java fern or water sprite).