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Nikko Blue Bigleaf Hydrangea Plant Live – Cold Hardy Shrub – Classic Large Blue Mophead Flowers – Zone 6–9 Garden Plant
Nikko Blue Bigleaf Hydrangea Plant Live – Cold Hardy Shrub – Classic Large Blue Mophead Flowers – Zone 6–9 Garden Plant
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USDA Zones/Minimum Temperature
USDA Zones/Minimum Temperature
It grows in USDA Hardiness Zones 6-9 and is hardy to temperatures as low as 0°F (-18°C).
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Nikko Blue is the hydrangea that defined a generation of American gardens — the classic, quintessential bigleaf hydrangea with enormous sky-blue mophead blooms that stop traffic every summer. For decades it has been the gold standard by which other blue hydrangeas are measured, and it still delivers one of the most spectacular floral displays in the garden world. The large, rounded flower heads are a true, vibrant blue in acidic soils and can reach up to 10 inches across, held on strong stems above lush, deep green foliage. If you want the definitive blue hydrangea, Nikko Blue is it.
🌱 WHAT YOU RECEIVE
• One healthy, well-rooted Nikko Blue bigleaf hydrangea plant
• Grown in a nursery container
• Ready to plant upon arrival
❤️ WHY YOU'LL LOVE IT
• The classic blue hydrangea — a timeless American garden staple
• Enormous sky-blue mophead blooms up to 10 inches across
• True vivid blue color in acidic soils
• Strong stems support the massive flower heads beautifully
• Lush, deep green foliage all season
• Cold hardy to 0°F, USDA Zones 6–9
🌿 GROWING INFO
• Zones: 6–9
• Sun: Part shade to full sun (morning sun, afternoon shade ideal)
• Soil: Moist, well-draining, rich in organic matter
• Mature Size: 4–6 ft tall x 4–6 ft wide
• Flower color: Blue in acidic soil (pH below 6), pink in alkaline soil
📦 SHIPPING
• Ships within 1–2 business days
• Carefully packaged for safe delivery
• Ready to plant upon arrival
Plant Highlight
Plant Highlight
Common name: Nikko Blue Bigleaf Hydrangea.
Height x Diameter: 4–6 ft x 4–6 ft.
Minimum temperature: Hardy to 0°F.
USDA zones: 6–9.
Light: Part shade to full sun; morning sun and afternoon shade ideal.
Uses: Border, specimen plant, foundation planting, cottage garden, cut flower garden.
Deer Resistant: Moderately resistant.
Water: Regular; keep soil consistently moist.
Soil: Moist, well-draining, rich in organic matter.
Bloom season: Summer.
Flower color: Sky-blue in acidic soil (pH below 6); pink in alkaline soil.
Flower size: Up to 10 inches across.
Pollination and Ripening
Pollination and Ripening
Hydrangeas don’t need to be pollinated to grow or to produce their beautiful flowers. If you want your hydrangea to produce viable seeds (for example, if you’re breeding or want to grow plants from seed), pollination is needed. Hydrangeas are typically pollinated by insects (bees, butterflies, flies). The large, showy “petals” on mophead and lacecap hydrangeas are usually sterile florets that attract pollinators but don’t make seeds.
Shipping Restrictions
Shipping Restrictions
Can not ship to HI.
Planting Guide
Planting Guide
Planting Guide for Hydrangeas
Site Selection: Choose a location with morning sun and afternoon shade for best results. Avoid harsh afternoon sun, which can scorch leaves and fade blooms. Bigleaf hydrangeas prefer protected spots in colder zones.
Time of Year to Plant: Plant in spring or early fall when temperatures are mild. Avoid planting in the heat of summer.
Spacing: Space plants 4 to 6 feet apart to allow for mature spread and good air circulation.
Planting: Dig a hole twice as wide and just as deep as the root ball. Amend with compost or peat moss for moisture retention. Backfill, firm gently, and water thoroughly.
Watering: Keep soil consistently moist, especially during the first season and in hot weather. Hydrangeas wilt quickly when dry but recover with water.
Mulching: Apply 2–3 inches of mulch around the base to retain moisture and regulate soil temperature.
Flower color tip: To get vivid blue flowers, lower soil pH to below 6.0 using sulfur or aluminum sulfate. For pink flowers, raise pH with garden lime.
Pruning: Prune lightly right after blooming ends. Nikko Blue blooms on old wood — avoid heavy pruning in fall or spring, which removes next year’s flower buds.
Chill Hours
Chill Hours
Does not require chill hours.
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