Hydrangea Flower Frost. Hydrangeas can bounce back from superficial winter damage but not severe winter dehydration or root damage. 27052020 In this way are hydrangeas affected by frost.
Effects and Remedies for Frost Damaged Hydrangeas by Elaine Homstad Fairfax Master GardenerFigure 1. A few nights below zero are unlikely to kill the whole plant or do any serious long-term damage. The hydrangea needs the autumnal frost to start its annual dormancy.
Hydrangeas can survive the frost but the buds can be damaged.
Still No Flowers on Hydrangea. Then April arrived and instead of bringing showers it brought frost. F throughout the spring and fall seasons But that same Hydrangea may start to suffer in extreme cold or frost. Late-season frost can kill tender new growth on hydrangeas Hydrangea spp resulting in little or no blooms in the coming spring and summer months.