Bamboo is a prolific and invasive grower you shouldn't need to feed it it will grow through tarmac and break up concrete if planted in the ground. Best kept in large pot.
What have others experienced

I have never heard of anyone giving bamboo anything apart from weedkiller because it has become such a menace.

hi johnrobertson and inverglen thanks for your replys yes is very fast growing i have it in a half wooden barrel and it is trippled in size in one year

In pots it may need feeding, since it has little volume to draw from, and is watered more often. If the growth slows down, and the foliage turns yellowish, I would use a feed with proportions near 3-1-2--such as 18-6-12, 13-4-8, etc.--and follow the directions for pot plants. Clumping bamboos--such as Fargesia species--in the ground may need a similar feed to form a solid hedge in a timely manner.

hi tugbrethil yes the leaves are starting to go yellow i will give them a feed many thanks