How to Care for a Hydrangea Tree

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Hydrangea trees are known for their large clusters of flowers.
Hydrangea trees are known for their large clusters of flowers. (Image: hydrangea image by L. Shat from <a href='http://www.fotolia.com'>Fotolia.com</a>)

Hydrangea trees or shrubs are known for their pink, blue or white flowers and dark-green, deciduous leaves. The trees are capable of growing up to 25 feet tall with multiple trunks or stems. The branches are sometimes bent low with the weight of the flower bunches. Hydrangea trees can be used as hedges or as ornamental shrubs and should be planted away from the sides of homes to allow for growing room.

Things You'll Need

  • Shovel
  • Fertilizer
  • Lime
  • Aluminum sulfate
  • Pruning shears

Plant the hydrangea tree in full sun with moist, well-drained soil protected from the wind. Partial shade can be used if your yard is not in full sun; however, the hydrangea tree does best in full sun.

Fertilize soil with a balanced hydrangea fertilizer in early spring to maintain proper feeding of your tree. You can alter the pH levels in the soil to produce pink or blue flowers. For blue flowers add aluminum cultivars to the soil; for pink flowers add lime cultivars to the soil.

Water frequently to keep the soil moist and avoid windy areas, as the hydrangea loses moisture through its leaves. Irrigate weekly to replenish the water lost. Heavy mulching at the base of the tree will help the soil retain moisture.

Prune the hydrangea tree in early spring, as most plants will flower only on new growth. Remove dead wood to encourage new growth. Cutting back the flowers after they are done retains the beauty of the tree. Follow the pruning methods recommended for each type of hydrangea plant.

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