Black thistle
Cirsium vulgare
Bull thistle is an extremely hardy biennial that requires virtually no care once established in suitable conditions. It produces striking purple flowers that are magnets for pollinators but can self-seed aggressively. Best suited for wild gardens or naturalized areas where its spreading habit is welcome.
Care Level
Low
Sun
Partial Sun
Water
Moderate
Growth Rate
Moderate
Mature Height
24″ – 60″
Soil
sandy loam
Life Cycle
Perennial
Spacing
24″
Watering Schedule
Every 14-21 Days • Water At Base When Soil Is Completely Dry
Soil pH
7 – 7.5
Temperature
-30° – 95°F
Mature Spread
up to 48″
Root Depth
Deep
Foliage
Medium
Propagation: Seed
Native to
Attracts
Sources
Data: trefle, usda
Image: trefle.io — Taken Jun 12, 2019 by Manu Pacha (cc-by-sa)
Alhambra Garden Works
$43.19
Bayline Botanicals
$53.45
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Echo Park Flora
$52.46
Harbor Greens Nursery
$42.29
Hermosa Bloomery
$50.48
Lakewood Garden Center
$41.39
Long Beach Botanical Co.
$51.96
Magnolia Grove Nursery
$48.50
Redondo Coast Nursery
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Signal Hill Succulents
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