Also known as Sow Thistle · 1 saves
Sonchus
Sonchus, the genus most gardeners know as sow thistle. We track 3 varieties; the ones most used by real gardeners.
The 3 most-saved Sonchus varieties
3 species of Sonchus
Each one is a parent of the varieties above.
Track your Sonchus in Sow
Save the Sonchus you grow and get care reminders timed to your zone.
How to grow Sonchus
Whats common across all Sonchus varieties in our catalog — drawn from the care records of the 3 most-grown of them.
The Sonchus year
- Spring CleanupMarch67% of varieties
Cut back old, dead foliage to the ground before new growth appears
- PruneJune–August67% of varieties
Cut or pull flowering stems before seed heads mature to prevent wind dispersal.
- Check for PestsMay–July67% of varieties
Monitor for aphids, which colonize the tender stems and can transmit viruses to nearby crops.
Do
- Water consistently, especially during dry spells 🌱
- Prune after flowering to shape and promote new growth
- Apply organic fertilizer monthly during active growth
- Extract the entire taproot when weeding to prevent resprouting.
- Harvest only young, tender leaves for culinary use.
Avoid
- Avoid overwatering to prevent root rot ❌
- Don't neglect pruning which helps maintain plant health
- Avoid planting in heavy clay soils without amendments
- Do not rely on slashing or mowing alone, as cut stems quickly resprout.
What goes wrong with Sonchus
| Problem | What you'll see | What to do |
|---|---|---|
| Aphids | Sticky residue and distorted leaves | Spray with insecticidal soap or neem oil |
| Rabbits | Chewed foliage and stems, particularly on young rosettes. | Protect plants with physical barriers or wire mesh cages. |
| Powdery mildew | White powdery coating on leaves | Improve air circulation and apply organic fungicide |
| Root rot | Wilting, yellowing leaves and mushy, black roots in waterlogged soil. | Improve soil drainage and avoid planting in anaerobic, wet areas. |
| Iris yellow spot virus | Chlorotic or necrotic ring spots and straw-colored lesions developing on the leaves. | Promptly remove and destroy infected plants to prevent thrips from vectoring the virus to susceptible onion or ornamental crops. |
Making more Sonchus
Seed
- Tuck seeds into moist soil in early spring, taking 2 weeks to germinate.
Cuttings
- Cut 4-inch stem segments, remove lower leaves, and mist daily.
- Place in moist soil, keep humid for 6 weeks until roots develop.
Sonchus questions
How many types of Sonchus are there?
The Sow catalog tracks 3 distinct Sonchus varieties. The most popular — ranked by 1 real gardeners — are shown first above.
What zones does Sonchus grow in?
Across its varieties, Sonchus 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 Sonchus bloom?
Most Sonchus varieties bloom in spring to summer, spring. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Sonchus 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.