AMERLIFE 12x13.5x9 FT Polycarbonate Greenhouse with Quick Connector Fast Assembly, Large Greenhouses for Outdoors Winter Greenhouse, Swing 2 Doors 4 Vents , Black, YPG301

This greenhouse came in four boxes. I was impressed with the engineering quality. I would say you need to start out with the ground or platform being level. By doing this, the parts fit together without forcing or redrilling. Second, leave as many screws and nuts loose until all panels are installed. Then plumb and square the greenhouse before tightening fully. Caulking the panels took some time because there are no big gaps. I only used 1 1/2 tubes of caulk to do the entire roof. I also caulked the top panels before installing the lower roof panels making it easier to reach the top ones with a ladder. I put it together by myself and it took about 2 1/2 days (I did take it slow and tried to do it right not fast). Each metal piece is wrapped for protection in shipping and has protective pieces on every single piece that need to be removed before install. It took time to remove all of it, but not one piece was scratched up form shipping. The base installed measures 11' 7 1/2" outside (door side) and 13' 7 1/2" outside (6' walls side). I live up in ND, so time will tell to see how it holds up. I do wish they made this with 10mm panels instead of 6mm, but again time will tell. Overall, I'm impressed with the quality. Mine is set on railroad ties with class 5 gravel for the floor. I personally wouldn't just use the stakes it comes with that can be pushed into the ground as the only means to anchor it. Shipped through FEDEX. Hope this helps!

Terrible support. Roof panel cracked and they dont have any panels for sale. This is after 2 years which is unacceptable to me that they don’t carry any parts. Their solution was search the web and hope I find something.

After doing a fair amount of research on hobby greenhouses I decided to go with this 12' x 14' (approximately). And to be honest I was still a bit skeptical as to the quality. I come from a professional growing background as a horticulturalist and someone who has always had commercial greenhouses to grow in. But, recently retired, I missed having a greenhouse and decided on this one. At the beginning of the construction process I thought I had made a mistake in this purchase because of the lessor quality than I'm used to, but as the house began to take shape and the panels were being installed I changed my mind, this hobbyist house is really pretty strong and seems like it will last for year if properly taken care of. As every review states on this greenhouse "the directions suck!" and they do, I definitely had to undo and redo a couple of steps but I only lost about an hour in doing so. I spent so much time looking for the right part which many were labeled on the inside and not easy to find. A strong recommendation is open EVERY bundle and lay them out in numerical order, this will save you so much time and frustration. I built this house entirely by myself and it took me off and on three days but I know I could have completed it in two without all the interruptions; I didn't realize retirement could be so busy. That being said, I'm a very handy guy and can figure most things out by looking at them, but a couple of steps had me scratching my head. Take your time, don't over-tighten the hardware as it is not the best stainless steel produced and enjoy the process. The real joy comes from what will go on inside the house once completed. Enjoy, grow and share the bounty!