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Hardiness:
Zone 5
Bloom Time:
Mid-summer
Bloom Color:
Rich blue sterile florets surround the deep blue fertile flowers
Foliage Color:
Green
Fall Color:
Remains green
Size:
3-5 feet tall and wide
Exposure:
Full sun to partial shade
Soil:
Well-drained soil
Pruning:
Claudie forms its flower buds in later summer and then flowers in late
June. The best time to prune is it after it blooms, from mid-July to
mid-August. Cease pruning in mid-august to allow time for the
flower buds to form prior to winter.
As a young plant it
is best to prune or pinch your plant in order to build a full bodied,
well branched plant. If the plant is leggy when you purchased it,
shear the plant back hard by 1/3 to 1/2 its original size. Once it puts
on an inch or two of growth, pinch the branch tips to remove just the
growing tip. This tip controls branching. Once it is removed the
buds below it will turn into stems. Once these new branches grow an inch
or two, pinch the tip out again. You can repeat this throughout the
first growing season as you are tending your garden. Although you
will sacrifice one year of bloom, this technique results in a well
branched, full bodied plant that will have more flowers in subsequent
years. The second season in the ground, repeat the pinching practice (or
lightly shear) up until mid-August. Cease pruning and pinching to
allow the flower buds to set.
Watering:
High moisture. Moisture is a necessity of this plant.
Wildlife:
None
Type:
Deciduous
Fertilizing:
Fertilize in early spring by applying a slow release fertilizer
specialized for trees & shrubs. Follow the label for recommended rate of
application. Flower color is affected by pH. For blue flowers, the soil
must be more acidic and for pink flowers, the soil must be more
alkaline. An
easy way to induce blue flowers is to add one tablespoon of Aluminum
sulfate to a gallon of water and soak the roots in early spring. Treat
two times.
Uses:
Groupings or masses, perennial or shrub
borders, specimen, screens or hedges, mixed container, cut flowers.
Breeder:
Corinne Mallet
Named for the French
astronaut Claudie Andre-Deshays, hydrangea ‘Claudie’ is a fitting
tribute to a woman who truly “reached the stars.” Rich blue, starry
florets encircle deep blue fertile flowers. The sterile flowers are
unique, well-separated sepals that float like stars in the sky.
Like all Hydrangea
macrophylla, ‘Claudie’ is affected by soil pH. Acidic soil is
needed for the best blue color. The plant sets its flower buds in the
fall, so pruning should be limited to summer. Extremely cold
temperatures may kill flower buds; gardeners in northern climates may
wish to protect the plant overwinter.
Sources

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