Protecting Citrus Trees in Zone 7b: Site Selection and Cold Shelters

What "Protected Location" Really Means

For citrus in zone 7b (5–10°F lows), a protected site is sheltered from north and west winds—typically the east or southeast side of a building. Avoid south-facing walls; they warm up on sunny winter days, triggering premature growth that's then killed by night freezes.

Essential Cold Protection

Even "cold-hardy" varieties like 'Changsha' mandarin, bitter lemon, and pummelo need a backup plan. Prepare black plastic shelters (not clear—they create damaging greenhouse heat on sunny days) for each tree. Have them ready to deploy when forecasts drop below 20°F. Anchor edges securely to the ground with soil, bricks, or firewood to trap earth heat.

Recommended Resources

The Southeastern Palm Society's forthcoming book (late 2004) on growing citrus north of Florida will cover variety selection, flavor, ornamental value, and cold-hardiness strategies in detail.