
Hydrangea macrophylla 'Izu-no-hana'
Bigleaf hydrangea (Hydrangea macrophylla 'Izu-no-hana') is an iconic shrub that is native to Japan. It is a deciduous shrub with smooth olive-green foliage, and large domed clusters of showy-white mophead flowers in summer that turn to shades of pink and blue, depending on the soil pH. Growing best in full sun to partial shade, it is a low-maintenance plant that is excellent for use in gardens, borders, or as part of a hedge. It prefers well-drained soil and can adapt to a wide range of soils and climates. Aptly named “Bigleaf”, its leaves are large and oblong and can be up to thirty centimeters in length. “Izu-no-hana” which translates to “Blossoming Mountain”, is a reliable bloomer throughout the summer months, making it a favorite for gardeners worldwide.
Sunlight
Partial Shade
Water Needs
medium
Green areas show climates worldwide where this plant can grow.
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Water Every
"3-4" days
Sun Needs
partial-shade
Growth
High
Care Level
Moderate
💧 Water every "3-4" days
Seasonal Adjustments
Adjust watering frequency based on temperature, humidity, and season. Water more frequently in summer and less in winter.
Pro Tip: Check soil moisture before watering. Stick your finger 1-2 inches into the soil—if it's dry, it's time to water!
Start seeds indoors 6-8 weeks before last frost date
Take 4-6" cuttings in spring, root in water or moist soil
Take 4-6" cuttings in spring, root in water or moist soil
Propagate via Stem Propagation for best results
Take 4-6" cuttings in spring, root in water or moist soil
Good For:
Consider Carefully:
Enjoys dappled or limited direct sun—about 2–4 hours of morning or late afternoon light and protection during peak midday sun.
Keep soil consistently moist but not waterlogged. Water when top inch of soil is dry.
Plant in early spring or fall for best results. Blooms in summer.