Snapped this great photo of Phylostachys bambusoides 'Castillon' today. It seems that every year around this time, as temperatures cool, the culms turn a nice shade of red on the side it gets sun. This bamboo is a runner, can take full sun but looks best in some afternoon shade in Sacramento. A ten year in-ground grove can get up to 35 feet tall. Mine is in a large pot. Nice color on this bamboo!