Also known as Arum Lily · 234 saves
Arum
Arum, the genus most gardeners know as arum lily. We track 12 varieties; the ones most used by real gardeners.
The 10 most-saved Arum varieties
Browse all 12 Arum varieties →
3 species of Arum
Each one is a parent of the varieties above.
Track your Arum in Sow
Save the Arum you grow and get care reminders timed to your zone.
How to grow Arum
Whats common across all Arum varieties in our catalog — drawn from the care records of the 12 most-grown of them.
The Arum year
- PlantJuly–September92% of varieties
Plant tubers when dormant in late summer or early fall
- DivideJuly and August83% of varieties
Divide overcrowded clumps every few years during summer dormancy
- Spring CleanupMay and June50% of varieties
Foliage dies back naturally in late spring; remove yellowing leaves
- MulchMarch and October33% of varieties
Apply light mulch in spring; refresh in fall as winter foliage emerges
Do
- Water regularly to keep soil moist 🌱
- Mulch to conserve moisture
- Divide clumps every few years
- Mulch to retain soil moisture
- Keep soil consistently moist 🌱
Avoid
- Avoid overwatering to prevent root rot ❌
- Don’t expose to full sun in hot climates
- Avoid overwatering to prevent rot ❌
- Refrain from disturbing dormant rhizomes during winter
What goes wrong with Arum
| Problem | What you'll see | What to do |
|---|---|---|
| Aphids | Sticky residue on leaves | Spray with neem oil |
| Slugs | Chewed holes on leaves | Use organic slug pellets or diatomaceous earth around plants |
| Root rot | Wilting and yellowing leaves | Ensure well-draining soil and reduce watering |
| Generally pest-free | The calcium oxalate deters all browsing | Monitor only; no routine treatment needed |
| Root rot | Wilting and browning leaves | Improve drainage and reduce watering |
| Fungal leaf spot | Dark spots on leaves | Apply organic fungicide |
| Generally disease-free | No significant disease issues reported | Provide well-drained soil |
Making more Arum
Division
- Dig up mature rhizomes in early spring
- Divide into sections with roots attached
- Plant immediately in prepared soil
- Water thoroughly after planting
- Allow 6 weeks for establishment
Rhizome division
- Dig up mature clumps in early spring.
- Separate rhizomes with a sharp knife.
- Plant divisions 2 inches deep in moist soil.
- Water thoroughly after planting.
- Allow 6 weeks for establishment.
Arum questions
How many types of Arum are there?
The Sow catalog tracks 12 distinct Arum varieties. The most popular — ranked by 234 real gardeners — are shown first above.
What zones does Arum grow in?
Across its varieties, Arum 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 Arum bloom?
Most Arum varieties bloom in spring, early spring, late summer. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Arum 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.