Sonchus oleraceus
common sowthistle
An upright biennial to 1.5m, with a strong taproot, hollow stems, long, narrow, lobed, wavy leaves edged with soft spines. Clusters of yellow, dandelion-like flowers in summer are followed by fluffy, white seedheads
Other common names
hare's coleworthare's lettuce
see morehare's palace
hare's thistle
milky tassel
smooth sowthistle
Size
Ultimate height
1–1.5 metresTime to ultimate height
1–2 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drained, Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Yellow | Green | ||
| Autumn | Green | |||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H7Botanical details
- Family
- Asteraceae
- Native to GB / Ireland
- Yes
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Sonchus are mostly annuals with a few perennials and rarely a shrub. Most produce a basal rosette of deeply-toothed leaves, upright stems with clasping leaves and yellow, dandelion-like flowers
- Name status
Correct
How to grow
Cultivation
Grows naturally in disturbed ground such roadsides and poached pasture, or as a weed in gardens - cannot compete in established grass
Propagation
Spreads readily by seed
Suggested planting locations and garden types
- Wildlife gardens
Pruning
No pruning required
Pests
Generally pest-free
Diseases
May be susceptible to powdery mildews and a leaf spot
Get involved
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