Cold frames and low tunnels
These can create a more protected growing space where conditions and active management support their use.
Victory Garden Arizona Library
Season Extension for Arizona
In Arizona, season protection is not only about cold.
Excessive heat, intense sun, wind, and frost can each limit vegetable production. Protection works best when matched to the exposure and crop being observed.
From the 1943 guide
Cold frames offer a historical starting point for discussing protected growing. Their value today depends on local weather, ventilation, crop needs, and daily management.
Arizona Today
Frost cloth
Use frost protection as part of a site-specific plan; do not assume a universal temperature benefit.
Shade cloth and wind protection
These can moderate harsh sun and exposure, especially during stressful heat periods.
Observe temperature, ventilation, moisture, and plant response in each protected area. Protection that helps at one time of day or season can create a different problem when conditions change.
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