Globe thistle is a unique perennial that thrives in poor, sandy soil. This plant produces round, spiky blue or purple flowers that bloom from mid-summer to early fall. Globe thistle is drought ...

Globe thistle is a unique perennial that produces round, spiky blue or purple flowers that bloom from mid-summer to early fall. This plant thrives in poor, sandy soil and full sun, making it a ...

No other thistle species in New Zealand is a perennial. Other species are either annuals or biennials, all with tap roots. Only the Californian thistle has horizontally growing creeping root systems ...

Canada thistle, a terrestrial herbaceous perennial in the Asteraceae family, is an open-land invasive that prefers disturbed upland areas as well as wet areas with water fluctuations. Canada thistle ...

Canada thistle is a colony-forming perennial from deep and extensive horizontal roots. Stems are 1 to 4 feet tall, ridged, branching above. Leaves are alternate, lacking petioles, oblong or ...

Scotch thistle is a biennial weed, so it depends quite heavily on the establishment of seed on a regular basis if it is to be found commonly in any particular situation. In contrast, many pasture ...

Fallow may also be used to control perennials such as Canada thistle and perennial sow-thistle. With these species, the first tillage should be done at the bud stage. Food reserves are at a low at ...