Hardiness Zones
What USDA zones measure, the bands and halves for zones 1 to 12, where each zone occurs, and real yards growing in every zone.
Learn: a yard and garden reference library
Permanent reference articles for yard enthusiasts, built from primary sources and from the real yards members share here. The first collection covers plant hardiness zones, the climate basics every planting decision starts with.
More collections are planned. Each one will follow the same rule: researched in depth, sourced, and kept current as its data changes.