Milk Thistle
Silybum marianum
Also listed as Carduus marianus, Mariana mariana
Also known as Blessed Milk-thistle, Mary's Thistle, Marian Thistle
Climate Match for your location
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A tall, thistle-like plant with spiny purple-pink flower heads and distinctive white-veined green foliage. Valued for ornamental appeal and medicinal seed pods, it thrives in hot, dry conditions with minimal care.
Why grow it
Milk thistle distinguishes itself among ornamental thistles through its striking white-veined foliage and reliably substantial seed production, making it useful for both visual interest and harvest in permaculture systems. Unlike many ornamental thistles, it establishes readily from seed in poor, dry soils with minimal soil preparation or ongoing inputs, suiting it to marginal garden spaces where other species demand richer conditions.
Watch out for
Milk thistle self-seeds prolifically once established, so deadheading spent flower heads or managing volunteer seedlings may be necessary if you want to prevent unintended spread into adjacent beds. The spiny stems and leaf margins require careful handling during cultivation and harvest.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Asteraceae
Native Range
Mediterranean
Seasonality
Bloom Season
Harvest Season
Edible Parts
Season of Interest
Notable Cultivars
Most milk thistle grown is the species itself rather than named cultivars; plants are selected primarily for seed yield and silymarin content rather than ornamental traits.
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Years to Bearing
- Propagation
A tall, thistle-like plant with spiny purple-pink flower heads and distinctive white-veined green foliage. Valued for ornamental appeal and medicinal seed pods, it thrives in hot, dry conditions with minimal care.
Climate Match for your location
See how well Milk Thistle grows in your area.
Enter your ZIP code and we'll show you how this plant fits your local climate.
Why grow it
Milk thistle distinguishes itself among ornamental thistles through its striking white-veined foliage and reliably substantial seed production, making it useful for both visual interest and harvest in permaculture systems. Unlike many ornamental thistles, it establishes readily from seed in poor, dry soils with minimal soil preparation or ongoing inputs, suiting it to marginal garden spaces where other species demand richer conditions.
Watch out for
Milk thistle self-seeds prolifically once established, so deadheading spent flower heads or managing volunteer seedlings may be necessary if you want to prevent unintended spread into adjacent beds. The spiny stems and leaf margins require careful handling during cultivation and harvest.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Asteraceae
Native Range
Mediterranean
Seasonality
Bloom Season
Harvest Season
Edible Parts
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Years to Bearing
- Propagation
Similar herbs you might consider:
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Companion Planting
Plants well with
Notable Cultivars
Most milk thistle grown is the species itself rather than named cultivars; plants are selected primarily for seed yield and silymarin content rather than ornamental traits.