Hydrangea macrophylla Magical Allegretto

Magical Allegretto Hydrangea

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Deciduous shrub known for large mophead blooms changing color from red to blue based on soil pH. Heat tolerant variety with strong stems and vibrant green foliage.
yard Outdoor plants wb_sunny Half-shade / Sun pets Not pet-safe
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Plant Details

Common Name Magical Allegretto Hydrangea
Family Hydrangeaceae
Genus Hydrangea
Species Macrophylla
Variety Magical Allegretto
Origin Cultivar of Asian origin (Hydrangeaceae family)
Blooming Summer to Autumn, color changes with soil acidity
Leaf Color Dark green foliage turning yellow in autumn before drop
Sunlight Half-shade / Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Rich, acidic loam or peat-based potting mix. pH 5.0-6.0 for blue flowers.

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Watering

Keep soil consistently moist but well-drained. Water deeply during dry spells; reduce in winter dormancy.

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Sunlight & Care

Morning sun with afternoon shade protection in hot climates. Avoid harsh midday heat.

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Fertilization

Balanced slow-release fertilizer in early spring, stop feeding by late summer to harden wood.

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Pruning

Prune after flowering or just before new growth in spring, remove dead stems and spent blooms.

Pest Control Aphid Leaf Miner Slug Snail Spider Mite

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 4 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 9 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
41° – 90°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 75%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1000 – 15000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
800 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
30% – 60%
% volumetric
Water content in the growing medium
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Soil EC
250 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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