As the creeping root system of Californian thistle is deeper in the soil than the residual herbicide, the plant is unaffected. No other thistle species in New Zealand is a perennial. Other species are ...

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 ...

Eryngoes, also called sea hollies, are perennial plants, occasionally annuals, with distinctive, bristly flower heads. They flower heads look more like thistles than carrots and come mainly in ...

Improving the soil means adding organic matter such as compost that will act like a sponge to hold more moisture. But you can ...

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 ...

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 ...

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 ...