Weeds and Their Control: Common Ragweed (Ambrosia artemisiifolia)
Karen The bane of every hay fever sufferer, common ragweed is a summer annual native to North America and is found throughout the United States including Hawaii but not Alaska. It…
Weeds and Their Control: Clammy Groundcherry (Physalis heterophylla)
If you are familiar with the cultivated plant Chinese lantern you will recognize its cousin, clammy groundcherry. Both are perennials in the genus Phasalis, produce papery lantern like structures, and…
Weeds and Their Control: Ivyleaf Morning Glory (Ipomoea hederacea)
A native of tropical areas of South America ivyleaf morning glory has spread to North America where it is now found from Arizona to Florida, north to North Dakota and…
Weeds and Their Control: Common Greenbrier (Smilax rotundifolia)
Hikers abhor this prickly perennial vine found in woodlands of the East Coast south to Florida and west to Michigan and Texas as it blocks their way and inflicts considerable…
Weeds and Their Control: Pokeweed (Phytolacca americana)
Pokeweed is a perennial weed native to eastern United States, the Midwest, and the Gulf Coast but has spread to the west coast, avoiding the Mountain states. It prefers part…
Weeds and Their Control: Giant Foxtail Grass (Setaria faberi)
Giant foxtail was introduced into North America from East Asia in the 1930s and is now a common weed in the eastern half of the United States especially in the…
Weeds and Their Control: Spanish Needles (Bidens bipinnata)
Spanish needles is a summer annual native to tropical America. It is found along most of the East coast, Midwest, South and west to California. Spanish needles prefers partial shade,…
Weeds and Their Control: Common Milkweed (Asclepias syriaca)
Common milkweed is native to most of the United States east of the Rocky Mountains. It prefers full sun, fertile soil, and mesic conditions but tolerates much less and can…
Weeds and Their Control: Tall Morning Glory (Ipomoea purpurea)
Tall morning glory is an annual vine native to Mexico and Central America. Introduced as an ornamental in the 1700s, it has naturalized in most of the United States except…
Weeds and Their Control: Johnson Grass (Sorghum halepense)
Considered one of the ten worst weeds in the world, Johnson grass is a perennial weed native to the Mediterranean region but growing throughout Europe, as well as in the…