A greenhouse kit that is pleasant in a mild spring can be a poor tool in the low desert. Before you order a pallet, match the structure to the heat, the sun, and the ground you actually have.
Start with the glazing, not the brochure photo
Twin-wall polycarbonate is the sensible default on this list. The air gap takes the edge off a cold night and, with shade over it, it does not behave like a single sheet of glass at three in the afternoon. If you already own a frame and only need a repair, order a glazing panel from accessories. Do not buy a second full kit to replace one cracked sheet.
Shade is part of the structure
In a Sonoran summer the roof needs shade, not just a vent. A 50 percent shade cloth over the ridge, grommets toward the bows, is enough for many benches. Put the cloth on in late spring and take it off when the nights turn useful again. Order the cloth as an accessory. It is not packed inside the kit.
Count the vents, then add openers
Our compact kit has one roof vent. The 10 by 16 has two. The gothic arch has three. A wax-cylinder opener on each of those vents will lift them when nobody is in the yard at noon. One opener does not run a whole house. Order one per vent.
The base is a site decision
The kits include anchors for soil and for a slab. Caliche and a fresh concrete pad are different jobs. If the site is a stem wall, say so when you order the larger kits so we pack the base conversation into the confirmation instead of into a second shipment. A lean-to still needs a sound wall. The Sonora kit fastens to masonry or wood. It does not include the wall.
What to send with a trade order
Send the kit name, how many, the delivery state, and whether the address can take a liftgate. Freight is $49 inside the United States, free at $500 in goods, and the checkout page is where that number becomes final. Handling starts the same business day only if the order is in before 2:00 PM Central Time in Chicago.