Hydrangeas typically bloom from mid-spring through late summer or early fall, with the exact timing depending on the species, cultivar, and climate. Most hydrangea flower clusters last about 6 to 8 weeks, though some varieties can bloom for up to two months or even all summer long under ideal conditions
. Here is a breakdown of bloom times by common hydrangea types:
- Climbing hydrangea and oakleaf hydrangea: May to July, with oakleaf hydrangeas blooming from late spring or mid-summer into fall and having long-lasting flowers
- Mountain hydrangea: June to August
- Bigleaf hydrangea (mophead and lacecap): June to September, with some reblooming varieties flowering throughout the season
- Panicle hydrangea: July to September, with blooms lasting until winter's chill in some cases
- Smooth hydrangea: June to September
In warmer climates, hydrangeas may stop blooming during extreme summer heat but often rebloom in the fall
. Deadheading spent flowers can encourage longer blooming into fall
. Newly planted hydrangeas may take 2-3 years to bloom well
. In summary, hydrangea blooms generally last from about 6 weeks up to 2 months per flowering period, and the overall blooming season can extend from mid-spring to early fall or even later depending on the variety and growing conditions
