Good decision
Use the zone to remove trees, shrubs, and perennials that cannot survive the expected winter low.
USDA Hardiness Zone
Zone 13: Deep tropical
The average annual extreme minimum falls within 60°F to 70°F. Use that limit for perennial winter survival, then add local heat, frost timing, wind, soil, and moisture.
Use Zone 13 as a winter limit
USDA Zone 13 is defined by an average annual extreme minimum temperature of 60°F to 70°F. Use it to screen perennial winter survival, then check summer heat, frost dates, soil, water, and exposure.
Incomplete decision
Do not use the number alone for annual planting dates, summer heat, irrigation, soil drainage, or disease pressure.
The same zone behaves differently across the country
Check four conditions after winter hardiness
- Last spring frostSets the earliest practical timing for tender plants.
- Summer heat and humidityCan stress plants that survive the winter easily.
- Root-zone drainageWet winter soil and dry summer soil create different failures.
- Yard microclimatesWalls, slopes, wind, and low pockets can shift exposure inside one property.
Plant shortlist
Start with plants that include Zone 13
The plant collection uses the published hardiness statement from each profile. Confirm the exact cultivar before buying.