The Spruce states that it depends on your growing zone, the type of hydrangea, and whether the plant is dormant. The ideal time to prune a hydrangea depends on whether the shrub blooms on new wood, ...
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29 hydrangea types that can thrive in cold winter temperatures
Among these cold-tolerant hydrangeas are varieties with pinky-red and green blooms, while others are resistant to those pesky deer and rabbits in your yard.
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