Last week, I had a lot of calls and pictures sent to me from people concerned about a strange, pale green grass growing in their lawn. The grass became noticeable when it began to sprout seedheads. The offending grass is named Poa annua, otherwise known as annual bluegrass.
Poa annua is a strange weed for homeowners to wrap their brains around. It is a winter annual, meaning that it germinates in the late summer or early fall once soil temperatures fall below 70 degrees. The seedlings grow in the fall, overwinter in a vegetative state, then flower and produce seed in late spring and early summer.