How to Fertilize spear thistle?
Balanced perennial feed every four weeks from spring through summer

spear thistle · Cirsium vulgare
Also known as: bank thistle; bird thistle; blue thistle; boar thistle; bull thistle; bur thistle; button thistle; horse thistle; plume thistle
Naturally occurs in grassland and disturbed ground
Balanced perennial feed every four weeks from spring through summer