Posted: 12/06/2016 at 18:00
Joan - are they fairly new, as in a year or two or less? Photo would be helpful as well as how long you've had them, which ones they are (if you had a label or know that), what size of pot and size of plant, what compost you have them in and your watering/feeding habits and where your pots are in terms of sunlight, shelter, wind etc. They love moisture and too much drainage affecting drainage resulting in too much dryness can cause problems but there are some bamboos which don't throw out new shoots or growth in the first year. Could be any number of things depending on some of the above and other reasons.
Last edited: 12 June 2016 18:01:59