I was trying to envision this myself, and at some point was wondering if maybe the comet had some translucent ice, then light could get through and gases could

I was trying to envision this myself, and at some point was wondering if maybe the comet had some translucent ice, then light could get through and gases could stay in? Still, if it's cold enough to maintain the ice, I don't see how a tree is going to have a good time with it.