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Hydrangea Care Guide

By Julie Bawden-Davis ; Updated July 21, 2017
Hydrangeas have big bold leaves and large flower clusters.

The vibrant blooms of Hydrangea macrophylla color the garden from mid-summer through fall. This deciduous shrub, commonly called bigleaf hydrangea, is easy to grow if you keep a few cultural tips in mind.

Planting Location

Hydrangea flowers are long-lasting.

Place bigleaf hydrangeas in a protected area of the yard that receives morning sun and afternoon shade. Exposed full-sun locations cause droopy leaves and scorched flowers.

Soil Requirements

Provide hydrangeas with moist, well-drained soil that contains ample organic matter. Add a 2- to 4-inch layer of compost at planting time.

Hydrangea flower color is determined by the soil's pH. In general, acid soils (between 5.0 pH and 5.5 pH) produce blue flowers while alkaline soils (6.0 pH and higher) create pink flowers.

Watering

The hydra in hydrangea means water in Greek. Keep hydrangeas consistently moist. During dry spells, soak them once or twice a week. Apply a 2- to 3-inch layer of mulch to retain moisture and suppress water-guzzling weeds.

Fertilizing

Feed bigleaf hydrangea throughout the growing season. Clemson University suggests using a general-purpose fertilizer, such as 10-10-10, in March, May and July.

Pruning

Bigleaf hydrangea blooms form on wood grown the previous year. Prune right after flowering so the plant can develop the required "old wood" to produce blossoms the following year.

 

About the Author

 

Julie Bawden-Davis is an accomplished writer, who specializes in home and garden. Since 1985, she’s written for a wide variety of publications, including “Organic Gardening,” "Better Homes and Gardens," "Ladies' Home Journal," "Parents," "Family Circle" and "The Los Angeles Times." Her books include "Fairy Gardening" and "Reader's Digest Flower Gardening." Bawden-Davis holds a Bachelor of Arts in journalism and is a certified master gardener.