It's 8' square, and there's a 110 gallon stock tank pond in it. That should help keep the temperature stable and raise the humidity a bit. I have a spot for a 2' square bog garden area, which I'm probably going to plant in a Rubbermaid tub or similar, elevated off the ground so I can easily reach it.
I'm going to try and rig the greenhouse roof with some gutters that funnel all the rainwater into a catch barrel, which will have a direct line to the bog. The bog will have a drainage hose or two a couple inches up from the bottom, which will drain into a 5gal bucket, so it can't flood completely. I don't know how much water it'll get, but I'll add more water if needed. I'm in Texas, so there won't be too much water, but I figure I can probably keep things moist enough.
Any suggestions on mulch? I'm thinking pine needles or wood chips. I mostly want to plant sarracenia, nothing with shallow roots.
Anyone tried keeping an outdoor bog garden in Central Texas? If so, how much did you have to water it?