bloooooooom Eight o's. Don't count, bookmark. Plan a bed

Carolina allspice

Calycanthus floridus · Calycanthaceae

Carolina allspice (Calycanthus floridus) in flower
Photo: Didier Descouens, via Wikimedia Commons (CC BY-SA 4.0)

A rounded native shrub with glossy, aromatic leaves and unusual maroon-brown flowers that smell of strawberries, pineapple and banana. The scent varies from plant to plant.

Size
8 ft tall, 8 ft wide
Zones
4 to 9
Light
Full sun to part shade
Flowers
Early May to late June
Pets
Toxic (moderate)
Job in a bed
Anchor

A bed built around Carolina allspice

The planner designed this bed around Carolina allspice when this page was made: a 22 × 10 ft (6.7 × 3.0 m) English border in zone 6, part sun. It chose the other plants from the 708 that suit those conditions, and says below why Carolina allspice stands where it does.

A 22 × 10 ft (6.7 × 3.0 m) bed at eye level in early June: Carolina allspice, Leadwort, Coral bells 'Firefly', White mugwort, Joe Pye weed 'Little Joe', Virginia bluebells, Coneflower 'Green Jewel', Chives, Creeping phlox, Golden Japanese euonymus, Easter lily, Daffodil, Surprise lily.
A 22 × 10 ft (6.7 × 3.0 m) English border in zone 6, part sun, seen from the path in early June.
1. Carolina allspice110. Golden Japanese euonymus102. Leadwort22. Leadwort22. Leadwort29. Creeping phlox99. Creeping phlox99. Creeping phlox93. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'32. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort23. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'39. Creeping phlox99. Creeping phlox95. Joe Pye weed 'Little Joe'55. Joe Pye weed 'Little Joe'55. Joe Pye weed 'Little Joe'54. White mugwort44. White mugwort44. White mugwort45. Joe Pye weed 'Little Joe'54. White mugwort411. Easter lily1111. Easter lily1111. Easter lily1111. Easter lily113. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'38. Chives88. Chives88. Chives88. Chives88. Chives86. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells63. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'36. Virginia bluebells66. Virginia bluebells66. Virginia bluebells68. Chives88. Chives88. Chives88. Chives88. Chives88. Chives86. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells66. Virginia bluebells63. Coral bells 'Firefly'33. Coral bells 'Firefly'33. Coral bells 'Firefly'32. Leadwort22. Leadwort22. Leadwort28. Chives88. Chives88. Chives87. Coneflower 'Green Jewel'77. Coneflower 'Green Jewel'77. Coneflower 'Green Jewel'77. Coneflower 'Green Jewel'77. Coneflower 'Green Jewel'72. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort22. Leadwort211. Easter lily1111. Easter lily1113. Surprise lily13. Surprise lily13. Surprise lily13. Surprise lily13. Surprise lily13. Surprise lily13. Surprise lily12. Daffodil12. Daffodil12. Daffodil
From above, to scale. Each circle is one plant, as wide as the room it needs.

The plants

  1. 2 Leadwort × 27, blue
  2. 3 Coral bells 'Firefly' × 19, red
  3. 4 White mugwort × 4, cream
  4. 5 Joe Pye weed 'Little Joe' × 4, pink
  5. 6 Virginia bluebells × 16, blue
  6. 7 Coneflower 'Green Jewel' × 5, green
  7. 8 Chives × 14, purple
  8. 9 Creeping phlox × 5, white
  9. 10 Golden Japanese euonymus × 1, variegated leaves
  10. 11 Easter lily × 6, white
  11. 12 Daffodil × 3, yellow
  12. 13 Surprise lily × 7, pink

Why this plant

  • Part of the bed's structure. Shrubs and grasses keep their shape when the perennials die down. So does golden Japanese euonymus.

Why here

  • Anchors a back corner. At 8 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 Joe Pye weed 'Little Joe' (4 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 8 weeks. From early May to late June.
  • In company. With Virginia bluebells, creeping phlox and daffodil in early May: 4 kinds at once.

Planned as an English border: 17 of the 21 groups (81%) are drifts, longer along the bed than they are deep. Cool colours (blue, pink and purple) with red and yellow as the warm notes, and cream, green and white to calm things between them. Carolina allspice and golden Japanese euonymus anchor the back corners of the bed: the tallest plants on the plan stand there.

The planner's own design check: 12 Excellent, 4 Good, 1 Satisfactory.

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

Where Carolina allspice goes in a border

At 8 ft it belongs at the back of a bed. In the planner's ten height classes it is super tall (over 6½ 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.

Buy it in flower so you can smell the plant you are getting. It is adaptable and trouble-free, with yellow autumn colour, and suckers slowly into a colony.

  • Fragrance near a path or seat
  • Native shrub borders
  • Sun or shade

What to plant with Carolina allspice

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.
  • Christmas fern: its dark green leaves are a setting for the flowers, before and after; low enough (20 in) to stand in front of it.
  • Solomon's seal: in flower together for four weeks, from early May; low enough (3 ft) to stand in front of it.

Questions about Carolina allspice

Does Carolina allspice need sun or shade?

Carolina allspice 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 ordinary well-drained soil, of average fertility, and a good soak in dry spells.

What zones does Carolina allspice grow in?

USDA zones 4 to 9. It is hardy to zone 4, which means it survives winter nights down to about −20 °F (−29 °C).

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

When does Carolina allspice flower in my zone?

In zone 5 it flowers early May to late June. As a spring flower it moves about a week for every zone: earlier where it is warmer, later where it is colder.

Roughly when Carolina allspice is in flower
Zone 4Mid May to early July
Zone 5Early May to late June
Zone 6Early May to late June
Zone 7Late April to late June
Zone 8Mid April to late June
Zone 9Mid April to mid June

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 Carolina allspice be planted?

6½ ft (200 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 8 ft (240 cm), so a group knits into one patch.

It grows 8 ft (240 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.

How many Carolina allspice plants do I need?

Usually one. At 6½ ft (200 cm) across, it is a plant you place, not one you mass. For a hedge or screen, set them 6½ ft apart: two plants for a 10 ft run.

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

Is Carolina allspice poisonous to dogs and cats?

Yes: moderate toxicity to people, dogs, cats and horses. The seeds are poisonous if eaten, and have poisoned grazing animals.

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

Is there a pet-safe plant like Carolina allspice?

These come closest to doing what Carolina allspice does, and no toxicity is recorded for them:

  • Arrowwood viburnum: the same job in a bed and the same size; flowers late May to late June, white, not red.
  • Red osier dogwood: the same job in a bed, the same size and the same flowering time; white, not red, wants moist soil.
  • Common ninebark: the same job in a bed and the same size; flowers late May to late June, white, not red.

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

Do deer eat Carolina allspice?

Mostly not. NC State lists it as resistant to deer. No plant is proof against a hungry deer in a hard winter, but this one is low on the menu.

Will Carolina allspice spread?

It spreads sideways, by runners or roots; the risk of it taking over is moderate. Spreads by suckers into a wider clump. Remove the outer shoots to contain it.

What flowers after Carolina allspice?

Carolina allspice is over by late June. These start as it finishes and carry the same spot on, so it never goes flat:

  • Hollyhock: from early July to late August, 6 ft tall, to stand in front of it and cover its fading stems.
  • Delphinium: from late June to mid July, 5 ft tall, to stand in front of it and cover its fading stems.
  • Hardy hibiscus: from late July to mid September, 5 ft tall, to stand in front of it and cover its fading stems.

What does Carolina allspice look like in winter?

Carolina allspice drops its leaves and stands as bare branches. That is when to see its shape, and to prune it if it needs pruning.

Is Carolina allspice good for bees and butterflies?

Carolina allspice is visited by pollinators and butterflies.

It is native to the United States.

More Calycanthus

In these guides

Zone guides: Zone 4 · Zone 5 · Zone 6 · Zone 7 · Zone 8 · Zone 9

In flower in: May · June

Every fact on record

Type
Shrub
Size
8 ft (240 cm) tall, 8 ft (240 cm) wide
Plant
6½ ft (200 cm) apart
Height class
Super tall (over 6½ ft)
Place in the bed
Back
Flowers
Early May to late June; red
Leaves
Medium texture, deciduous; dark green
Shape
Rounded, spreading
Hardy in
USDA zones 4 to 9
Light
Full sun, part sun, part shade
Soil
Average, well-drained
Water
Moderate
Feeding
Light, in spring
Family
Calycanthaceae
Comes from
Pennsylvania to SE. U.S.A
Attracts
Pollinators, butterflies
Stands up to
Deer, heat

Checked against NC State Extension. 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.