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Smooth hydrangea 'Invincibelle Spirit II'

Hydrangea arborescens 'NCHA2' (Invincibelle Spirit II) · Hydrangeaceae

Rounded heads of deep pink, fading to green, on sturdy stems, from early summer to frost: a pink 'Annabelle'.

Size
3½ ft tall, 3½ ft wide
Zones
3 to 8
Light
Full sun to part shade
Flowers
Late June to mid September
Pets
Toxic (mild)
Job in a bed
Anchor

A bed built around smooth hydrangea 'Invincibelle Spirit II'

The planner designed this bed around smooth hydrangea 'Invincibelle Spirit II' when this page was made: a 12 × 6 ft (3.7 × 1.8 m) English border in zone 6, part sun. It chose the other plants from the 708 that suit those conditions, and says below why smooth hydrangea 'Invincibelle Spirit II' stands where it does.

A 12 × 6 ft (3.7 × 1.8 m) bed at eye level in early August: Smooth hydrangea 'Invincibelle Spirit II', Mossy saxifrage, Mouse-ear coreopsis 'Nana', Turtlehead 'Hot Lips', Gray's sedge, Palm sedge, Giant snowdrop.
A 12 × 6 ft (3.7 × 1.8 m) English border in zone 6, part sun, seen from the path in early August.
1. Smooth hydrangea 'Invincibelle Spirit II'14. Turtlehead 'Hot Lips'44. Turtlehead 'Hot Lips'44. Turtlehead 'Hot Lips'44. Turtlehead 'Hot Lips'44. Turtlehead 'Hot Lips'43. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'32. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage23. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'33. Mouse-ear coreopsis 'Nana'35. Gray's sedge55. Gray's sedge55. Gray's sedge56. Palm sedge66. Palm sedge66. Palm sedge62. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage22. Mossy saxifrage27. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop7. Giant snowdrop
From above, to scale. Each circle is one plant, as wide as the room it needs.

The plants

  1. 2 Mossy saxifrage × 19, red
  2. 3 Mouse-ear coreopsis 'Nana' × 9, yellow
  3. 4 Turtlehead 'Hot Lips' × 5, pink
  4. 5 Gray's sedge × 3, green
  5. 6 Palm sedge × 3, green leaves
  6. 7 Giant snowdrop × 12, white

Why this plant

  • The only dense clusters. The others are open bowls, daisies, spires and others. Shape reads at a distance, where colours blur.
  • Part of the bed's structure. Shrubs and grasses keep their shape when the perennials die down. So do Gray's sedge and palm sedge.

Why here

  • Anchors a back corner. At 3½ ft it is the tallest plant here, and the tallest close the ends of the bed, where they stand in front of nothing.
  • A step in the back row. Next to Gray's sedge (2½ ft): no two neighbours there are the same height, so the back steps up and down like a skyline.
  • One plant, alone. A shrub is seen as an object, and needs clear ground around it.

Why now

  • In flower for 13 weeks. From late June to mid September.
  • Part of the bed's peak. With turtlehead 'Hot Lips' and Gray's sedge in mid August: 3 kinds at once. No week has more.

Planned as an English border: 6 of the 6 groups (100%) are drifts, longer along the bed than they are deep. The bed is balanced: the left half carries 52% of the visual weight and the right half 48%. The bed is tied together by its repeats: two kinds come round again along it, mossy saxifrage and mouse-ear coreopsis 'Nana'.

The planner's own design check: 14 Excellent, 2 Good, 1 Satisfactory. It flags one thing to watch: Nothing on this plan is highly poisonous or an aggressive spreader.

Open this bed in the planner Change its size, the sun or the style, move plants about, or swap one for another.

Where smooth hydrangea 'Invincibelle Spirit II' goes in a border

At 3½ ft it belongs at the back of a bed. In the planner's ten height classes it is moderately tall (3 to 4 ft).

Its job: anchor. A shrub that gives the bed permanent structure. Planted singly, as soon as the front edge is laid; everything else is arranged around it.

It flowers on new wood, so no winter can stop it, and reblooms without deadheading. Cut it back by a third in early spring.

  • Pink mopheads in cold climates
  • Massing in part shade
  • Cut and dried flowers

What to plant with smooth hydrangea 'Invincibelle Spirit II'

Plants recorded as good partners for it, and what each pairing does:

  • Hosta: its green leaves are a setting for the flowers, before and after; bold leaves against its medium ones; spires rising out of its mound.
  • Japanese forest grass: its green leaves are a setting for the flowers, before and after; low enough (18 in) to stand in front of it; happy in the same moist soil.
  • Astilbe: in flower together for four weeks, from late June; low enough (24 in) to stand in front of it; happy in the same moist soil.

Questions about smooth hydrangea 'Invincibelle Spirit II'

Does smooth hydrangea 'Invincibelle Spirit II' need sun or shade?

Smooth hydrangea 'Invincibelle Spirit II' grows in full sun (6 or more hours of direct sun a day), part sun (4 to 6 hours of sun, including some afternoon sun) and part shade (2 to 4 hours of sun, mostly in the morning).

It wants soil that stays evenly moist, rich in organic matter, and a good soak in dry spells.

What zones does smooth hydrangea 'Invincibelle Spirit II' grow in?

USDA zones 3 to 8. It is hardy to zone 3, which means it survives winter nights down to about −30 °F (−34 °C).

Above zone 8 it struggles: the zones measure winter cold, but a plant's top zone usually means the summers are too hot or the winters too mild for it to rest.

Gardening in Canada? Use the USDA zone for your town: Canada's own zone map uses different numbers.

When does smooth hydrangea 'Invincibelle Spirit II' flower in my zone?

In zone 5 it flowers late June to mid September. As a summer flower it moves about half a week for every zone: earlier where it is warmer.

Roughly when smooth hydrangea 'Invincibelle Spirit II' is in flower
Zone 3Early July to mid September
Zone 4Early July to mid September
Zone 5Late June to mid September
Zone 6Late June to mid September
Zone 7Late June to mid September
Zone 8Late June to mid September

Worked out from Hopkins' bioclimatic law: spring arrives about four days later for each degree of latitude north, and one zone is roughly two degrees. A warm spring or a cold one moves any garden two weeks either way.

How far apart should smooth hydrangea 'Invincibelle Spirit II' be planted?

3 ft (90 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 3½ ft (110 cm), so a group knits into one patch.

It grows 3½ ft (110 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.

How many smooth hydrangea 'Invincibelle Spirit II' plants do I need?

At 3 ft apart, set out in staggered rows:

  • 1 to fill 10 square feet (about 1 m²)
  • 4 for a single row 10 ft (3 m) long
  • 4 to fill a 4 × 8 ft bed on its own

In a mixed border, plant it as one, planted singly: it is the bed's structure, and everything else is arranged around it.

In the bed above, the planner used one in one group.

Is smooth hydrangea 'Invincibelle Spirit II' poisonous to dogs and cats?

Yes: mild toxicity to people, dogs, cats and horses. Leaves and buds can cause vomiting and diarrhoea if eaten.

Rated from NC State Extension and the ASPCA. Where references disagree, the more cautious rating is used.

Is there a pet-safe plant like smooth hydrangea 'Invincibelle Spirit II'?

These come closest to doing what smooth hydrangea 'Invincibelle Spirit II' does, and no toxicity is recorded for them:

Matched the way the planner's Swap button matches plants: the same job in a bed, then size, then flowering time.

Do deer eat smooth hydrangea 'Invincibelle Spirit II'?

They may. NC State does not list it as resistant to deer or rabbits. Where they visit, protect it, or plant it among ones they avoid.

What flowers after smooth hydrangea 'Invincibelle Spirit II'?

Smooth hydrangea 'Invincibelle Spirit II' is over by mid September. These start as it finishes and carry the same spot on, so it never goes flat:

  • Garden chrysanthemum: from mid September to late October, 24 in tall, to stand in front of it and cover its fading stems.
  • Blue wood aster: from mid September to mid October, 3 ft tall.
  • Montauk daisy: from mid September to late October, 3 ft tall.

What does smooth hydrangea 'Invincibelle Spirit II' look like in winter?

Smooth hydrangea 'Invincibelle Spirit II' drops its leaves and stands as bare branches. That is when to see its shape, and to prune it if it needs pruning.

Is smooth hydrangea 'Invincibelle Spirit II' good for bees and butterflies?

Smooth hydrangea 'Invincibelle Spirit II' is visited by pollinators, butterflies, moths and songbirds.

It is a host plant: the caterpillars of hydrangea sphinx feed on its leaves. A butterfly can only lay its eggs on its host plants, so these do more for it than any nectar flower.

It is native to the United States (this is a named variety of the native plant).

More Hydrangea

In these guides

Zone guides: Zone 3 · Zone 4 · Zone 5 · Zone 6 · Zone 7 · Zone 8

In flower in: June · July · August · September

Every fact on record

Type
Shrub
Size
3½ ft (110 cm) tall, 3½ ft (110 cm) wide
Plant
3 ft (90 cm) apart
Height class
Moderately tall (3 to 4 ft)
Place in the bed
Back
Flowers
Late June to mid September; dense clusters; pink
Leaves
Medium texture, deciduous; green
Shape
Rounded, clumping
Hardy in
USDA zones 3 to 8
Light
Full sun, part sun, part shade
Soil
Rich, evenly moist
Water
Moderate
Feeding
Light, in spring
Family
Hydrangeaceae
Comes from
Eastern U.S
Attracts
Pollinators, butterflies, moths, songbirds
Host plant for
Hydrangea sphinx
Stands up to
Salt, black walnut, erosion

Checked against NC State Extension, ASPCA poison lists and VASCAN (plants of Canada). Flowering times are for zone 5: later in colder zones, earlier in warmer ones. Toxicity and spread information is a general gardening guide, not veterinary or medical advice, and invasive status varies by region. If a person or pet eats a plant, contact poison control or a vet. Check your local invasive species list before planting anything with a spread warning.