@Chris1948 Yeah, I'm in Georgetown (not far from you) - and we have that same problem with deer. Sometimes we have 15-20 in our yard at a time. They eat everything in sight. We invested in some electric fencing from Home Depot -- very affordable -- it's basically yellow wire (coated with some type of plastic or nylon ) - they sell the plastic posts, some sort of control box, and a grounding post. We fenced quite an area probably 25 x 20 this last summer and I put all my garden and patio plants in there. The posts are probably less than 4' tall, but we put two strands of the wire - and boy did that keep the deer out. Every now and then a post would be yanked partially out - where they had to scramble to get away from the fence. We only invested about $100 (or a little more). They also sell "electric fence" signs you can hang on it. So we mostly have the deer blocked now.
Enjoy your new greenhouse. You got it up just in time -- this weather has been a bit brutal the last few days.