Weedy

The grass was left long and weedy in the slate walk, and very often he wasn't cutting the grass on the other side of the hedge by the road at all.

Source: tatoeba (51381)

More than 50 million people in the United States suffer from allergies, and their numbers are growing. New studies suggest that climate change may be at least partly to blame. Scientists say rising average temperatures and elevated levels of carbon dioxide are spurring the growth of many weedy, allergenic plants — such as ragweed — and extending the season of suffering for pollen-sensitive people across the country.

Source: tatoeba (12247946)

Climate change has brought dramatic droughts and floods around the world, ruining harvests of important cereal crops and reviving concerns about food security on a warmer planet. Researchers at the U.S. Department of Agriculture are looking at cereal crops at risk and their wild, weedy relatives. The weeds are more resilient under extreme conditions, and seem to be benefiting from climate change, while regular crops suffer.

Source: tatoeba (12248103)

weedy grounds

Source: wiktionary