Grow Guides · April 28, 2026
Greenhouse Build Week 1: Foundation and Frame
Starting from scratch in the Utah sun
Why We Built a Greenhouse
Utah's high desert climate is beautiful but unforgiving. Our tomatoes needed protection from the intense sun, unpredictable frosts, and the occasional hail. A greenhouse seemed inevitable.
The Foundation
Week one was all about getting the foundation right. We leveled the ground, marked out the 24x12 footprint, and started digging post holes. The Utah soil cooperated—no buried rocks, no water table surprises.
We used concrete to set the posts, sinking them 3 feet deep. In Utah's freeze-thaw cycles, shallow posts are a recipe for disaster. By mid-week, the concrete had set and we were ready for framing.
Framing Lessons
What We Got Right
Using pressure-treated lumber for ground contact. Pre-drilling every screw hole. Building the frame on the ground before lifting.
What We'd Do Differently
We underestimated how heavy the frame would be. Having a third pair of hands (or a small crane) would have saved us a long afternoon of creative cursing.
The structural integrity of a greenhouse depends entirely on proper post installation and frame alignment. Rushing this phase guarantees problems later.
Utah State University Extension Greenhouse Management — Dr. Dan Drost (2024)
By Friday, we had eight posts set, the frame assembled, and the skeleton of the greenhouse standing against the Utah sky. Week two would bring the plastic covering and the real test of our design.
A greenhouse built right is a greenhouse built once.
Follow along with week two as we add the plastic cover and ventilation system.
