Ruby Slippers Hydrangea

What is Ruby Slippers Hydrangea?

Ruby Slippers Hydrangea (Hydrangea quercifolia ‘Alice’) is a compact cultivar of oakleaf hydrangea — a shrub native to the southeastern US. It grows 3.5–4 feet tall and wide in USDA Zones 5–9, producing white cone-shaped flowers in June that age through pink to ruby-red by August. Fall foliage turns burgundy-red.

Introduced by the US National Arboretum and awarded the Gold Medal by the Pennsylvania Horticultural Society, Ruby Slippers is one of the most ornamentally significant recent introductions in the native plant shrub category for US gardens.

Unlike bigleaf hydrangeas (H. macrophylla), the flower color in oakleaf hydrangeas is not affected by soil pH. The transition from white to rose to deep red is a natural aging process that occurs regardless of soil chemistry.

Ruby Slippers vs. other oakleaf hydrangeas

Ruby Slippers is the best choice for US gardeners who want the oakleaf hydrangea’s ornamental qualities in a smaller package. Snow Queen is the next step up in size with a tidier shape.

For information on panicle hydrangeas (including Limelight, Bobo, and Incrediball), our limelight hydrangea guide covers that distinct species, which has different care requirements and blooms on new wood.

USDA zones and regional performance

Ruby Slippers grows in USDA Zones 5–9, but its native range origins (southeastern US) influence where it performs best:

• Zone 5–6 (Midwest, New England, Pacific Northwest): fully hardy; sometimes slower to establish; protect from late spring frosts in exposed sites
• Zone 7–8 (Mid-Atlantic, Upper South, Pacific Coast): ideal performance range; excellent heat and drought tolerance once established; blooms reliably every year
• Zone 9 (Deep South, parts of California): tolerates heat well; provide afternoon shade to reduce leaf stress; consistent irrigation needed in summer

The straight species (H. quercifolia) is native to Alabama, Georgia, Mississippi, and neighboring states, which explains the heat tolerance that distinguishes oakleaf hydrangeas from bigleaf types.

Planting Ruby Slippers Hydrangea

Site selection

Site considerations:

• Light: morning sun (4–6 hours) + afternoon shade in Zones 7–9; full sun tolerated in Zones 5–6 with consistent moisture
• Soil: rich, well-draining, slightly acidic (pH 5.0–6.5)
• Space: allow 5 feet from structures and other plants (it spreads wider than it grows tall)
• Drainage: essential — oakleaf hydrangeas do not tolerate standing water

Ruby Slippers is a native woodland edge plant. It performs best at the edge of a tree canopy, in dappled light, or on the north or east side of a building. Deep shade (below 2–3 hours of direct light per day) limits flowering.

Planting steps

1. Dig a hole 2–3 times as wide as the root ball and the same depth
2. Improve drainage if needed with perlite or coarse grit mixed into the backfill
3. Set the shrub with the root flare at or slightly above soil level
4. Backfill with the original soil — no need to heavily amend with compost at planting
5. Water deeply (5–7 gallons) after planting
6. Mulch with 3–4 inches of wood chips or pine straw in a 3-foot ring around the base, keeping mulch away from the stems

Best planting time: spring (March–May) or fall (September–October) in most US zones. Spring planting gives the full growing season for establishment. Fall planting works well in Zone 7+ where winters are mild enough for continued root growth.

Watering Ruby Slippers Hydrangea

Water deeply and regularly during the first two growing seasons (1–2 inches per week). Once established, Ruby Slippers is more drought-tolerant than most hydrangeas but still benefits from supplemental water during dry spells.

First-year care:

• Water 5–7 gallons per plant once or twice a week, depending on rainfall
• Check soil moisture at 2-inch depth; water when dry at that depth
• Do not let the root zone dry out completely during the first summer

Established plant care:

• In Zone 5–7 with normal summer rainfall: minimal supplemental watering needed
• In Zone 8–9 or during drought: water every 7–10 days June–August
• Reduce watering in fall as the shrub goes dormant

Ruby Slippers is significantly more drought-tolerant than bigleaf hydrangeas (H. macrophylla), which may need daily water in summer heat. This makes it better suited to US climates with summer dry spells. For comparison, our hydrangea care guide explains the different water needs across hydrangea types.

Fertilizing

Apply a balanced slow-release fertilizer formulated for acid-loving plants (azalea/rhododendron fertilizer, 12-6-6) in early spring just as new growth begins.

Fertilize once in spring; do not fertilize after July. Late fertilizing pushes soft new growth that is susceptible to early fall frost damage.

Mulching with 3–4 inches of pine straw, pine bark, or shredded leaves provides slow nutrient release and maintains the slightly acidic pH that oakleaf hydrangeas prefer.

Pruning Ruby Slippers Hydrangea

Prune immediately after flowering (August–September) or in early spring (March) before new growth begins. Never prune in fall or winter — oakleaf hydrangeas bloom on old wood, and fall/winter pruning removes next year’s flower buds.

What to prune:

• Dead, damaged, or crossing branches
• Old flower heads if they bother you aesthetically (they hold beautifully through winter if left on)
• Stems that are growing beyond the desired footprint

What not to do:

• Do not cut back hard in fall to “clean up” — this is the most common cause of no-bloom the following year
• Do not prune to stimulate flowering — old wood pruning does the opposite

For timing guidance on all hydrangea types, our oakleaf hydrangea care guide covers the specific pruning windows for H. quercifolia varieties.

The ornamental display: what to expect season by season

Spring (March–May): large, oak-shaped leaves emerge deep green. Flower buds visible at branch tips.

Early summer (June–July): flowers open — white, cone-shaped panicles 6–8 inches long. A fully established Ruby Slippers (year 3+) can produce 30–50 flower heads.

Late summer (August): flowers age from white to pink to rose, reaching deep ruby-red by mid-August. This is the peak ornamental moment — the name “Ruby Slippers” comes from this color.

Fall (September–November): dried flower heads turn warm tan-brown and persist on the plant. Foliage transitions from green to deep burgundy-red — one of the best fall foliage colors of any US-grown hydrangea.

Winter: dried flower heads and exfoliating (peeling) bark provide winter interest. The cinnamon-brown bark peels in layers, becoming more ornamental as the shrub ages.

Ruby Slippers in the native plant garden

Oakleaf hydrangea is a true US native — found naturally in undisturbed forest understory from Georgia to Mississippi. As a cultivated form of a native species, Ruby Slippers supports a wider range of wildlife than non-native ornamentals.

Wildlife benefits:

• Pollinators: the showy outer flowers (sterile) attract visual pollinators; the small inner flowers (fertile) provide nectar and pollen for bees, including native sweat bees and small native bee species
• Birds: the dense branching structure provides nesting cover for songbirds
• Winter birds: dried seed clusters are consumed by seed-eating birds through the winter

For a native shrub garden that uses Ruby Slippers alongside other native plants, our attract pollinators to your garden guide covers pairing native shrubs with native perennials for multi-season wildlife support.