Also known as Buckthorn · 114 saves
Rhamnus
Rhamnus, the genus most gardeners know as buckthorn. We track 4 varieties; the ones most used by real gardeners.
The 4 most-saved Rhamnus varieties
Track your Rhamnus in Sow
Save the Rhamnus you grow and get care reminders timed to your zone.
How to grow Rhamnus
Whats common across all Rhamnus varieties in our catalog — drawn from the care records of the 4 most-grown of them.
The Rhamnus year
- PruneJanuary, February and June100% of varieties
Requires minimal pruning; remove any dead or damaged branches in late winter.
- MulchApril50% of varieties
Apply a layer of mulch in spring to retain soil moisture.
- PlantSeptember–November50% of varieties
Plant in fall to establish roots over the winter.
Do
- Water consistently during dry spells 🌱
- Prune to maintain desired shape
- Mulch to retain moisture
- Water deeply during dry spells to establish roots 🌱
- Prune in late winter to maintain shape and remove dead wood
Avoid
- Avoid overwatering to prevent root rot ❌
- Don’t fertilize late in the season
- Never ignore pest signs
- Do not prune in late summer or fall to prevent stress
What goes wrong with Rhamnus
| Problem | What you'll see | What to do |
|---|---|---|
| Aphids | Sticky residue on leaves, distorted growth | Use insecticidal soap or neem oil |
| Scale insects | Bumps on stems and leaves | Apply horticultural oil during dormant season |
| Root rot | Wilting, yellowing leaves | Improve drainage and reduce watering |
| Leaf spot | Dark spots on foliage | Remove affected leaves and improve air circulation |
| Leaf Spot | Dark spots on leaves, which may yellow and drop prematurely. | Improve air circulation, water at the base of the plant, and apply a copper-based fungicide if necessary. |
Making more Rhamnus
Cuttings
- Take semi-hardwood cuttings in late summer
- Dip in rooting hormone
- Plant in moist soil
- Keep soil moist for 6 weeks until roots develop
Seeds
- Sow seeds in early spring
- Press into soil surface and keep moist
- Germination takes 4-6 weeks
Rhamnus questions
How many types of Rhamnus are there?
The Sow catalog tracks 4 distinct Rhamnus varieties. The most popular — ranked by 114 real gardeners — are shown first above.
What zones does Rhamnus grow in?
Across its varieties, Rhamnus covers USDA Zones 4–10. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Rhamnus bloom?
Most Rhamnus varieties bloom in late spring, early spring. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Rhamnus 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.