How were the plants transported to your property? Did you fertilize them at the time of transplanting?

Can you post some pictures?

Kt

Thank you so much for answering. These Oldham's were bought two months ago from a local nursery in Gardena, CA. near where I live, zone 9 "ish." I ammended the soil with lots of compost -- Kellogg gardening soil, however, the soil deeper down is clay. We've had a few days of heavy rain, then wind, then cold snaps around 40 degrees at night. The "boos" were fine until this and the leaves seemed to yellow within a few days. I'm checking the soil, it seems moist but not waterlogged. I'm using a grass slow-release ferilizer high in nitrogen.

Here's a photo. I hope I did this correctly:)

Here is a link that might be useful: http://tinypic.com/r/demx3l/5

{{gwi:404959}}

It could very well be transplant shock. If you will notice, the dying leaves start back at the stem, not from the ends of the leaves, (cold nips from the ends of the leaves). Your plant is drawing something from the soil that is doing this.
Is there any chance that there could be some weed killer in the soil where it is planted? Or run-off from an area where weed killer or chlorine bleach could contaminate the soil? I know bamboo is very sensitive to chlorine, which it can come in contact with from a laundry drainage area. These are just ideas of thought, stabbing in the dark as it were!

Thank you so much for your response, I will check into it!

My bamboo is about three years old. the leaves aren't browning like in the photo above - but they are all yellowish - as opposed to a healthy green.
ideas?

Be thankful...mine is blooming :(

melwins10, so how did you solve your problem? I have the similar issue. I think it's too much water. you may think the top of the soil is just moist but the very buttom that touches the clay is waterlogged and soggy. that's my experience. you have to raise the bamboo up 2 inches so the bottom of the bamboo is well above the water line.