Poa annua, poa annual or Annual Bluegrass is a widespread low-growing turfgrass in temperate climates.
It is often present in soils which have low Calcium but high Potassium, Magnesium, Sulfate and Zink. The soil drainage must be good for Poa to grow. It is often a problem in soils that do not have adequate organic matter.
Poa annua has a weak and shallow root system and needs frequent rainfall or irrigation to survive. It grows well in moist areas in partial shade to full sun and tolerates compacted soil conditions