Species bigleaf hydrangea
Bigleaf Hydrangea macrophylla 'Nikko Blue' showcasing vibrant blue flower heads against the backdrop of glossy green foliage

bigleaf hydrangea

Hydrangea macrophylla 'Nikko Blue'

Bigleaf hydrangea (Hydrangea macrophylla 'Nikko Blue') is a deciduous shrub known for its showy, blooming clusters. It features large green leaves and deep blue, cone-shaped clusters with mop-like heads of small florets. The flower colors vary from pale blue to deep blue depending on soil pH levels, ranging from pink to purple and to almost white in more alkaline soil. In the summer, it bears rich cloud-like flowers on long, strong stems in pristine shade hues. Growing 4-5 feet tall and 3-5 feet wide, this hydrangea is best planted in partial sun to light shade, with some protection from hot afternoon sunlight. This versatile shrub is a great addition to any garden, adding ornamental value with its unique foliage and flowers.

Cycle:

Perennial

Watering:

Average

Propagation:

Seed Propagation,Greenwood Cuttings,Hardwood Cuttings,Stem Propagation,Cutting

Hardiness Zone:

6 - 9

Flowers:

Pink to blue Flowers In Summer

Sun:

Deep shade, Filtered shade, Part sun/part shade

Soil:

Acidic, Alkaline, Well-drained

Fruits:

blue,purple Fruits Ready In Fall

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Moderate

Care Level:

Medium

watering

Bigleaf hydrangea (Hydrangea macrophylla 'Nikko Blue') should be watered once a week or when the top inch of the soil has dried out. Deep watering is best for this species, so it's important to thoroughly saturate the root zone. Make sure not to over water, as this can lead to root rot and other issues. It's also important to water evenly, so your hydrangea gets consistent moisture throughout the root zone.

sunlight

Bigleaf hydrangea (Hydrangea macrophylla 'Nikko Blue') should receive partial to full sun in the morning, with some shade in the afternoon. The ideal amount of sunlight for this plant species is 4-6 hours of morning or midday sun daily, with some shade in the afternoon. Planting in a location that receives partial shade is also recommended, as this species cannot tolerate extremely hot temperatures. It is important for this species to avoid very dry or hot conditions, as intense light and heat can cause leaf burn.

pruning

Bigleaf Hydrangea (Hydrangea macrophylla 'Nikko Blue') should be pruned annually in late winter or early spring, before new growth begins. Pruning should consist of removing dead, diseased, or damaged stems, and cutting back excess or overly long stems, ensuring that even light pruning encourages more blooms. No more than 1-third of the stems should be pruned each year, as the plant relies on old wood for flowering. Additionally, pruning should be done prior to any fertilizing to help keep the plant healthy.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Bigleaf hydrangeas typically start flowering in late spring, usually in May or June.

Starts Flowering

Bigleaf hydrangeas typically start flowering in late spring, usually in May or June.

Harvest Fruit

The best time to start harvesting the fruits from Hydrangea macrophylla 'Nikko Blue' is in July and August.

Hardiness Map