How to Boost Cold Hardiness in Perennial Plants
Winter can devastate perennial borders when cells freeze, rupture, and desiccate. Strengthening cold hardiness is less about heroic rescues and more about a sequence of small, timely interventions that start in high summer. Plants survive sub-zero nights by accumulating sugars, thickening cell walls, and shifting water out of protoplasts. The gardener’s role is to maximize…