Don’t assume that you’re missing something if you have a question that cannot be answered within the guidelines of the shed plans. Builders at all levels will always have questions and it is better to ask the question than miss something important in the process. Go online and find a forum or a video if you have a question. Better yet, read all the little print that you skipped over in your shed plan and see if the answer is there, it might be.
Our wood greenhouse shed plans have lots of windows and use clear polycarbonate roofing that lets in plenty of light to keep your plants happy and green. Several designs use the same doors that are installed on residential homes to keep construction simple and allow the door to have a glass panel to let in even more sunlight. The floors are made using 2x6 pressure treated wood so plants can be watered inside without the worry of damaging the floor.
I did my wall studs and roof rafters at 24″ on center, so I used 2 x 6’s for the roof. Also, I made loft storage in the rafters of the front and back 5′ or so and left the middle 6′ or so open for access to the lofts and better lighting. I left the lower cords out in the middle trusses and reinforced them with hurricane ties and extra blocking. To better support the front and back loft floors I doubled up the lower cords on the front and back truss and on the two on either side of the opening and then floored the lofts with 2/4″ plywood. I also put four 14″ x 14″ plastic skylights in tht roof over the center open area to let additional light in.
The walls of the foundation have been created and the electrical is all set, now all that needs to be done is to fill the gaping hole in between them with limestone agrigate.  We also threw in some concrete paving stones that we had lying around because we don't plan on using them and we had already tried to give them away.  After the limestone is in place tamp it down by jumping on it and keep filling up any places that are no longer level.  After the entire base is filled with as much limestone as you can fit put a sprinkler on to soak it and set it for the next hour or so.  You may need to add a bit more limestone after this is done as well.
Build the framework for all four walls. To account for the fact that the front and back walls are different from each other (due to the doorframe in the front) and the side walls must both be sloped (to prevent rain from collecting on the roof), each of these will have to be tackled somewhat differently. It’s easiest to construct the back first, the front second, and the two sides last, as shown in the numbered image below. See How to Frame a Wall for more information before you read the instructions below.[5]

how to build a shed