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But there are over 50 species of hydrangea worldwide offering vast variety in flower, form, and sun tolerance. “Most hydrangeas like part sun (4-6 hours of direct sun) or dappled shade,” says ...
Although big leaf hydrangeas need sun to bloom well, give them afternoon shade in hot regions. Also, most varieties bloom on old wood, so prune just after the flowers have faded.
"In general, more acidic soil will turn them blue or bluish, while basic soil will turn them a more pink color," she advises. She provided this pH scale for hydrangea colors: Bright blue: 4.5
The flowers on a hydrangea shrub can change from blue to pink or from pink to blue from one season to the next depending on the acidity level of the soil. [32] Adding organic materials such as coffee grounds and citrus peel will increase acidity and turn hydrangea flowers blue. [33]
Hydrangea quercifolia flowers are borne in erect panicles 6–12 in (15.2–30.5 cm) tall and 3–5 in (7.6–12.7 cm) wide at branch tips. Flowers age in colour from creamy white, aging to pink and by autumn and winter are a dry, papery rusty-brown. Unlike bigleaf hydrangea (Hydrangea macrophylla), flower color does not vary with soil pH ...
Hydrangea integrifolia is primarily used as an ornamental. It is vigorous but grows slowly enough to not become invasive. It is salt tolerant and shade tolerant though full shade will reduce the amount of blooming. H. integrifolia requires regular watering, well-drained soil and sturdy supports. It can handle full sun to partial or dappled shade.
Hydrangeas of all types need some sun to bloom. Most types prefer full to part sun, though they do best with afternoon shade in hot climates. Mountain hydrangeas will tolerate more shade than ...
Hydrangea serrata is similar to H. macrophylla except it is a smaller more compact shrub with smaller flowers and leaves; it is also more hardy. With a rounded habit, it features dark green, serrated (toothed), ovate leaves to 15 cm (6 in) long, and clusters of long-blooming blue or pink lacy flowerheads in mid- to late summer.