plant hardiness

Plant hardiness zones changing, slowly

Beckie Fox

"Will it grow in my zone?" is the pertinent question about plant hardiness for perennials. The lines on the maps for zones are changing, slowly.

Corylopsis (Photo by Brendan Zwelling)

Hardiness zones are drifting

Judith Adam

The U.S. Department of Agriculture updated plant hardiness map reveals that hardiness zones are drifting, illustrating the warming trend

Laburnum tree in flower. Garden Making photo.

Global warming and plant hardiness

Garden Making

Despite the warming trend, borderline hardy plants in my garden continue to suffer winter damage. The apparent message for gardeners is that global warming hasn’t altered plant hardiness zone designations.