PVC
I’ve finally built my greenhouse for my new garden. It’s a twenty by twelve foot hoop-style greenhouse with wooden ends and is covered with 11 mil woven poly. This greenhouse has some pretty cool features that I really appreciate, and I think you will too. First of all, the poly I used to cover it is fantastic. It is a super tough woven poly that I got from Northern Greenhouse out of Manitoba.
An Inexpensive, Hail Proof, PVC Pipe Greenhouse | Alberta Home Gardening
How to Build an Inexpensive Hoop-Style Greenhouse | Alberta Home Gardening
One of the most valuable assets in my garden is my greenhouse. It has allowed me to grow plants that I normally would not be able to grow, produce crops that the season is not usually long enough to produce, and protect my plants from frosts, hail, or other severe weather that normally would have destroyed my garden. But I don’t have thousands of dollars to spend on a greenhouse. I just priced out an 8’x12’ greenhouse for $3,500.
How to Build a PVC Hoophouse for your Garden - The Westside Gardener
An unheated PVC hoophouse can be a useful addition to your garden. It keeps excessive rain off the plants, blocks the wind, raises daytime temperatures 5-10 degrees (and often much more), and keeps frosts and heavy dew off the leaves. This can extend your warm-season gardening a month or more at both ends, and makes it possible for year-round gardeners to grow a wider variety of plants through the winter. PVC hoophouses are inexpensive to build, and can be put up in about an hour. Take a look, and decide for yourself! Before getting started, you need to mark out where in the garden your hoophouse will be placed.