St Barnaby's Thistle
Centaurea solstitialisfam. Asteraceae
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Pl. 28DD — Centaurea solstitialis
Centaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialisCentaurea solstitialis
IOverview
Overview
St Barnaby's Thistle (Centaurea solstitialis) is a hardy forb or herb that thrives in various European and Asian habitats, from Albania to Ukraine, and beyond to regions like Saudi Arabia and Turkey. Known for its edible leaves, this plant can be found across a wide range of conditions, including light, medium, and heavy soils with a pH between 7 and 7.5. It is native to parts of Europe such as Albania, Austria, and Belarus, but has spread more widely due to its adaptability. This annual or biennial reaches heights of about 0.6 meters and is distinguished by its light, dry to moist nature, making it a versatile addition to gardens or foraged landscapes where conditions are right.
Quick answers
What is St Barnaby's Thistle?
St Barnaby's Thistle (Centaurea solstitialis) is a hardy forb or herb that thrives in various European and Asian habitats, from Albania to Ukraine, and beyond to regions like Saudi Arabia and Turkey.
Growingconditions · propagation · uses
VCultivation
Cultivation
St Barnaby's Thistle thrives in light to medium soil with a pH between 7 and 7.5, preferring areas that are dry to moist. It is hardy in temperate regions from zones 5-9 and can grow up to 0.6 meters tall as an annual or biennial forb/herb. For best results, plant the edible leaves in a sunny spot with well-draining soil. Propagate via seed sown directly into the garden bed during spring or fall.
Light
8/10
Water
Dry, Moist
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
5-9
Life cycle
Annual, Biennial
Habit
Forb/herb
Mature size
0.6 m tall
Soil pH
7–7.5
For first-time growers
How to grow St Barnaby's Thistle for the first time
8steps
Start with St Barnaby's Thistle as a simple, low-maintenance addition to your garden.
- 1
What you'll need
Seeds or young plants, a small trowel, and a watering can.
- 2
Best time to plant
Plant in spring after the last frost or in early fall for cooler climates.
- 3
Soil and container prep
Choose well-draining soil with a pH between 7 and 7.5, and ensure containers are at least 30 cm deep.
- 4
Sowing or transplanting
Direct sow seeds in the garden or start them indoors 4-6 weeks before planting outside. Transplant young plants if needed.
- 5
First two weeks
Water regularly to keep soil moist but not waterlogged, and protect from strong winds.
- 6
Ongoing care
Provide light watering during dry spells, and mulch around the base for moisture retention. Prune dead leaves as needed.
- 7
Harvest or pruning
Prune spent flowers to encourage more blooms and maintain plant health.
- 8
Common mistakes
Overwatering, planting in heavy soil, neglecting to prune, and not protecting from strong winds.
VIEdible & utility
Edible & utility
Edible parts:Leaves
Edible uses: The leaves of St Barnaby's Thistle are edible and can be prepared in various ways. They are often used raw in salads or cooked as a vegetable. The plant thrives in soils with a pH between 7 and 7.5, making it adaptable to different growing conditions.
Contextrange · companions · related
VIIDistribution
30 native · 0 introduced
Distribution
30 native · 0 introducedDistribution across3 continents· 30 native
Europe15 regions
native (15)AlbaniaAustriaBelarusBelgiumBulgariaCyprusFranceGermanyGreeceHungaryItalyNetherlandsRussiaUkraineUnited Kingdom
Asia4 regions
native (4)IranIraqKazakhstanKuwait
Africa3 regions
native (3)AlgeriaEgyptMorocco
Broader regions
native:Lebanon-Syria, Kriti, Czechoslovakia, East Aegean Is.
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family (Asteraceae), common use cases, and growing requirements.
same family · Asteraceae
Botanical relatives — often share phytochemistry + growing needs.
XI
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Companion planting
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Growing zone
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