This year has really been by far the most impressive year as far as gains, and some of my bamboos are putting out 1 inch diameter new shoots which will likely break the 10ft mark in a week or so. With consistently warm temperatures, a bamboo shoot will grow around 95% of it's height within a 2 week span, and some of my shoots are just starting to enter that stage.
Dulcis: Most of it's shoots are surprisingly coming off the same rhizome, and there are not too many of them, but it's planted in the shade so it shouldn't be growing as aggressively. The biggest 2 are around the 1 inch mark.
P Atrovaginata: This one is putting out 3 (1 inchers) off the same rhizome while another rhizome nearby is putting out a couple around the 1/2 inch mark, but this bamboo doesn't seem to use all of it's energy all at once. Last year after it made 3 shoots in spring, it made another 7 once the first 3 were done growing, and that is likely to happen again as there are about a dozen rhizomes that haven't done anything yet.
Phyllostachys Edulis moso: This one is done growing, and starting to leaf out with it's biggest culms over 2/3 inch in diameter, and up to approximately 7.5ft.
P Rubromarginata: This one has spread out a little, but still doesn't look much different from last year so hopefully it hasn't plateaued in size.