Hi everyone! I am planning on setting up a greenhouse on my concrete back patio to extend my growing season a bit. The greenhouse is about 6 ft long, 3 ft wide, and 3 ft tall and gets about 6-7 hrs of direct sun in the summer (not sure about spring or fall...right now it gets little to none due to the nearby forest blocking it all). I wanted to have a small (about 15 gallon) water garden in this greenhouse as well, partially to serve as a heat sink. I wanted to set up the greenhouse around April 15th and keep it set up at least into October. How does that sound? Would the concrete patio and the water garden stabilize temperatures sufficiently, or would the temperature change enough between day and night to do more harm than good? Thanks 