The 2023 USDA plant hardiness zone map shows the areas where plants can be expected to grow, based on extreme winter temperatures. Darker shades (purple to blue) denote colder zones, phasing southward ...

Nearly 5,000 miles from familiar forests, the traveling New Zealand naturalists were delighted to find that they might well have been tramping their own woodlands. There in the rain forests of ...

Frost is an important factor limiting geographical distribution and agricultural productivity of plants. Temperate zone plants can adapt to low growth temperatures and thereby increase in freezing ...