Smooth Hydrangea

Botanical Name

Hydrangea arborescens

Max Zone

Height

3 to 5 feet

Width

3 to 5 feet

Flowers

June: large, start green change to white, then brown

Light

Full sun to part shade

Soil

Moist, well-drained

Planting & Care

Keep soil moist in full sun
Forms flowers on new growth
Prune late winter after the worst of winter has passed /early spring before growth begins (You’ll enjoy the winter interest & increased hardiness
- OR prune in fall for a neater appearance over winter
Prune all stems back to 12 to 15” above the ground, then prune half of these back to ground level for less floppy growth
- OR All stems back to several inches above the ground – results in floppier growth

Problems

None serious

Varieties

Annabelle - flower clusters up to 12 inches wide
Grandiflora - Hills of Snow Hydrangea, flower heads 6 to 8 inches wide
Invincibelle Spirit- pink flowers
Incrediball – large round flowers. 5’ tall and wide

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March 26, 2026
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April 11, 2026
A Day in the Garden
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April 18, 2026
3rd Annual Spring Rally
Oshkosh, WI
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April 19, 2026
Ebert's Greenhouse Village
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April 23, 2026
Iowa State University
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April 25, 2026
Pasquesi Home & Gardens
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April 26, 2026
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May 2, 2026
Ebert's Greenhouse Village
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May 6, 2026
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May 9, 2026
Ebert's Greenhouse Village
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May 10, 2026
Ebert's Greenhouse Village
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May 16, 2026
Ebert's Greenhouse Village
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May 17, 2026
Ebert's Greenhouse Village
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May 21, 2026
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Sept. 12, 2026
Knowledge in Bloom Conference
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Melinda Myers