growing trees in pots is in effect growing bonsai, and as such should be treated that way. They will eventually become pot bound so largish trees should be repotted periodically (during the winter months). l have a couple of 30 year old, 1 metre conifers in 2 gallon buckets, due to be repotted. l have anchored them to the greenhouse to stop the wind blowing them over. feeding? l give them some general fertiliser when l remember. Surprisingly enough they are rather attractive. Don't know anything about bamboo though.