Many people ask if its ok to put your Betta in a vase with some plants.
The answer is yes, but ONLY IF YOU DO IT RIGHT.
The Betta will still require regular feeding and the changing of water. No they will not live long and healthy by eating off the plants. They should still be fed proper Betta Foods. The need for cleaning and water changes may become more frequent as the plant absorbs the water at a faster rate and you now have an algae producing product in with your Betta.
In otherwords, all in all, your over all Betta maintenance will increase. For some, it's a fair trade for the beauty of a Betta in a Vase.