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For blue hydrangea, the popularity prize has to go to Nikko Blue. This cultivar starts blooming in early summer and continues for months. Maturing to between 4 to 6 feet tall and about the same width, Nikko Blue isn't quite as winter hardy as some other hydrangeas so if you live in zone 6-9, count your lucky stars. Nikko Blue is the standard against which other mophead hydrangeas are judged.
Nikko Blue blooms on "old wood", the prior year's growth. If you choose to prune, do so right after first flowering finishes, in late June. This allows the plant to set new buds for the following year's blooms.
|Botanical Name:||Hydrangea macrophylla Nikko Blue|
|Common Name:||Mophead hydrangea Nikko Blue, Bigleaf hydrangea Nikko Blue|
|Growing Zones:||Zones: 6-9|
|Sun/Shade:||Partial Sun/Partial Shade|
|Flowers:||Prune after first flowering (by July)|
|Flower Color:||Blue flowers (rose pink in akaline soil)|
|Height:||4-6 feet tall and wide|
|Plant/Bulb Size:||1.5 Qt. Nursery Pot|
|Season:||Blooms early through late summer|
|Bloom Timing:||Early summer through late summer|
|Pkg. Count:||a 1 year old potted plant|
|Product info, photos and tips:||Hydrangea Planting Guide|
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