Also known as Sweetshrub · 122 saves
Calycanthus
Calycanthus, the genus most gardeners know as sweetshrub. We track 4 varieties; the ones most used by real gardeners.
The 4 most-saved Calycanthus varieties
Species of Calycanthus
Each one is a parent of the varieties above.
Track your Calycanthus in Sow
Save the Calycanthus you grow and get care reminders timed to your zone.
How to grow Calycanthus
Whats common across all Calycanthus varieties in our catalog — drawn from the care records of the 4 most-grown of them.
The Calycanthus year
- PruneJanuary, February, June and July100% of varieties
Prune to shape and remove dead wood immediately after flowering.
- MulchMarch and October75% of varieties
Apply a 2-3 inch layer of organic mulch to retain moisture.
- FertilizeMarch50% of varieties
Apply a balanced, slow-release fertilizer in early spring.
Do
- Prune after flowering to maintain shape
- Water regularly, especially during dry spells 🌱
- Mulch annually to conserve moisture
- Water regularly, especially in hot weather, to keep the soil consistently moist.
- Prune immediately after the first flush of flowers to shape the plant.
Avoid
- Avoid over-fertilizing which can reduce flowering ❌
- Don’t plant in poorly drained soil
- Never prune in late fall or winter
- Do not let the soil dry out completely, as this can cause stress and leaf scorch.
What goes wrong with Calycanthus
| Problem | What you'll see | What to do |
|---|---|---|
| Aphids | Sticky residue and distorted leaves | Use insecticidal soap or neem oil |
| Scale insects | Hardened bumps on stems and leaves | Apply horticultural oil during dormant season |
| Powdery mildew | White powder on leaves | Ensure good air circulation and apply fungicide if necessary |
| Bacterial Leaf Spot | Dark, angular spots on leaves, sometimes with a yellow halo. | Rarely a major issue. Improve air circulation. Remove and discard heavily infected leaves. Copper-based fungicides can be used as a preventative. |
Making more Calycanthus
Cuttings
- Take semi-hardwood cuttings in late summer.
- Dip cuttings in rooting hormone.
- Plant in moist, well-draining soil.
- Keep soil moist and place in indirect light.
- Roots develop in 6 weeks.
Division
- Divide mature shrub in early spring or fall.
- Dig around the root ball carefully.
- Separate into sections with roots attached.
- Replant immediately at same depth.
Calycanthus questions
How many types of Calycanthus are there?
The Sow catalog tracks 4 distinct Calycanthus varieties. The most popular — ranked by 122 real gardeners — are shown first above.
What zones does Calycanthus grow in?
Across its varieties, Calycanthus covers USDA Zones 4–9. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Calycanthus bloom?
Most Calycanthus varieties bloom in late spring, late spring to summer. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Calycanthus should I choose?
Start from the most-saved varieties above — popularity across thousands of gardens is a strong signal of reliability — then filter by your zone and sun. In the Sow app you can preview any of them in a photo of your actual yard before you buy.