I love the bamboo, the breeding rate has been cut with the update - this happened just when I decided to 'breed' it - I go on daily so not worried about the spreading, but now I get very few babies.
I don't know what the rate was prior to update - I think I was getting at least one a day from a plant, now its something like one every 3 days.
I thought/hoped flowers would stop it spreading, (if I got to that stage) advice tho seems to be lay down patterns.