The present invention describes a method of controlling annual bluegrass weeds by applying an effective amount of certain plant growth regulator compounds to an annual bluegrass plant.

Poa annua (annual bluegrass) is invasive on most sub-Antarctic islands and has recently been described as invasive in Antarctica (1,5,16).

Poa annua grass, also known as annual bluegrass, is a annual weed that is commonly found in lawns, but can be found in gardens as well.

Annual meadow grass, the nightmare of every greenkeeper and field manager

SOS is an excellent product, especially in the winter months as it germinates at a temperature as low as 6 °C. This is sooner than annual meadow grass, which germinates at around 8 °C. SOS is therefore another serious challenger of annual meadow grass.

SOS is an excellent product, especially in the winter months as it germinates at a temperature as low as 4 °C. This is sooner than annual meadow grass, which germinates at around 8 °C. SOS is therefore another serious challenger of annual meadow grass.

Overseeding with RPR or SOS, also in the autumn season, can reduce the proportion of annual meadow grass by as much as 40% leading up to the next spring.