The National Association of Landscape Professionals (NALP) announced the 10 U.S. cities that are expected to be most impacted by weed growth and disease this spring and summer.
Even if your region has been spared from what are anticipated to be the ‘worst cities,’ many other communities can expect significant problems, emphasizing the importance of vigilance for lawn care as the weather warms across the country.
The top 10 U.S. cities anticipated to be the worst for weeds this upcoming season are:
Dozens of species of weeds, including nimblewill and thistle, and a host of lawn diseases plaque this region, exacerbated by the typical hot and humid temperatures that make lawns in the Atlanta area especially prone to problems. With the National Weather Service forecasting the South to experience above average temperatures in the coming months, this region will be a hot bed for lawn threats. Combined with average precipitation, the higher temperatures will create the perfect conditions for dollar spot, a common lawn disease in the South, to thrive. Dollar spot thrives when soil is dry and the air is moist. Dollar spot can wreak havoc on lawns by attacking the leaf blades, creating discolored, tan and brown patches that expand across the lawn is it progresses. Disease pressure is expected to be very high this spring on warm-weather grasses.
Crabgrass thrives in the heat, making Florida a prime target for this weed. The weed aggressively spreads and restricts lawn growth in otherwise healthy lawns. Expect crabgrass to be even worse than usual in Florida in 2018, because the state is predicted to experience above average temperatures. High soil moisture can allow crabgrass to flourish. Based on Orlando’s rainfall predictions, crabgrass is expected to be especially problematic in the region in the coming months.
Dollar spot and red thread, two fungal diseases of lawns, are the common culprits here. In addition to heat, poor drainage can encourage the spread of red thread. Above average temperatures, coupled with higher levels of precipitation predicted for this area, create the conditions for these these threats and a host of weeds to thrive. In addition, Cleveland generally has more rainy days than other cities in the state, making its lawns more likely to be vulnerable.
Crabgrass and spotted surge — a weed that goes hand-in-hand with crabgrass and thrives in the same conditions — are the main weeds impacting Keystone State lawns through the summer months, along with dandelions in late spring. The forecast predicting warmer temperatures and higher levels of precipitation, combined with late winter and early spring snowfall that added more moisture to the soil in the Philadelphia region, will make this area especially prone to these weeds.
Crabgrass and spotted surge also inflict this region. Similar to Philadelphia, because this city has experienced late winter and early spring snowfall, and because the Northeast and Mid-Atlantic regions are forecasted to experience higher temperatures and above average precipitation, infestations of these weeds will be worse.
Black medic, a common sight here from late spring to end of summer, resembles clover, and indicates imbalances in the soil. Higher temperatures and more rainfall anticipated in this region will make black medic and similar weeds especially problematic in the Detroit metro area.
Dandelions prosper here in April and May, followed by troublesome white grubs, a lawn destroying insect, in the summer months. Dandelions actually indicate healthy soil, but will become a nuisance for the Wichita area in 2018 due to the average rainfall expected to create perfect conditions for growth. White grubs feed on the roots of grass and can cause extensive damage to lawns later in the summer when temperatures are forecasted to be higher than usual.
Spring weather in the Pacific Northwest has been extra cool, wet and blustery, favoring the development of moss, which can starve grass of its necessary nutrients; this lawn problem can also indicate drainage issues in the lawn. Dandelions also thrive in the same conditions. Expect dandelions to start sprouting later in the spring and into the summer, when the forecast predicts temperatures to be warmer than usual.
Salt Lake City, Utah
Warmer than average temperatures will make two of this region’s most troublesome weeds, crabgrass and spotted spurge, flourish here this summer, though below-average precipitation in the spring and early summer will help limit the moisture these weeds need to fully thrive.
Crabgrass and spotted spurge are the most problematic here in the height of summer. In 2018, the prediction for average temperatures and lower than average precipitation leading into to the dog days of summer make the weeds in this metro area still prevalent but not as virulent as in other cities.