How To Care For A Hydrangea Vine. Pot-grown hydrangeas may be prone to vine weevil attack and some plants will be damaged by frost. For blue blooms use acidic soil with a pH of 55 or less see Espoma Soil Acidifier.
If you are unsure as to when to water your hydrangea check with a horticultural specialist or nursery in your area as hydrangeas care can vary by region andor climate. Be sure to prune them only when the flowers start to lose their blooms. Gently loosen the roots then plant using plenty of rich soil.
You can also add a layer of mulch following hydrangea planting.
Water three times a week deeply for the first couple of years to encourage root growth. Fertilize this plant in. Prune to remove deadwood anytime and consider removing old flower heads soon after blooming. The second time give more water to saturate the plant and soil.