Winter care of hydrangeas

Potted plants are at the greatest risk, says Ruth

- Ruth Hayes

WHAT to do with hydrangeas in winter is one of AG’s most frequently asked questions, because although they are hardy, they do need specific care during the winter months.

If your hydrangeas are growing in the soil, mulch their root area with well-rotted organic matter (manure, compost, leaf mould) or bark chippings. This helps insulate the roots during very cold weather, retains moisture in the soil and suppresses weeds.

Choose a mild, damp day for mulching and don’t mulch if soil is dry or frozen as it will lock out moisture and lock in the cold.

Make sure climbing hydrangeas are securely tied in to prevent damage or injury in high winds.

Overwintering hydrangeas growing in containers can be more of a challenge. Although they like damp soil, constantly waterlogged compost can kill plants because the wetness forces the oxygen out and the roots ‘drown’.