Weeds are a undesirable native or invasive plant that mar the appearance of well-kept lawns. There are many species of weeds common to northeast Pennsylvania that vary in frequency, season and ease of control. Correctly identifying what type of weed you have on your lawn is the first step to restoring an aesthetically pleasing monoculture grass lawn.
Johnson grass is another perennial weed found in northeastern Pennsylvania. The base of the weed where the leaves emerge is maroon. The green leaf blades can reach up to 24 inches in length on plants that can reach heights up to nine feet tall. According to Penn State University, Johnson grass is one of the ten most troublesome weeds in the world. It spreads quickly because of its extensive root system; it keeps developing roots at lower stem nodes to produce more weeds. You may need to use herbicides to get rid of this weed.