A leaf spot on an English ivy. Start by removing infected leaves and stems, if possible, to slow the spread of the disease. Prune out and dispose of all diseased leaves and stems in the fall while ...

Most gardeners have heard of the wise advice “leaves of three, let it be” referring to the pest plant poison ivy. While not quite as catchy, the saying really should be “leaflets of three, let it be.” ...

Poison ivy has compound leaves with three leaflets per leaf. The middle leaflet has a longer stalk than the two side leaflets, and there is often a red mark in the middle where they meet on the stem.

Leaves of three, let it be? Not always. Get some tips on how to recognize poison ivy.

- The old saying "Leaves of three, Let it be!" is a helpful reminder for identifying poison ivy and oak, but not poison sumac, which can have 7 to 13 leaves.

$31 FOR 3 MONTHS Our premium News+ ad-free experience – only $10 more every 4 weeks!

Learn to identify poison ivy, poison oak, and poison sumac, and avoid contact with them. Remove these plants from around your home, especially in areas where you may be working or playing.

Green walls can strip pollution from the air -- and some plants do it better than others, according to new research. Researchers planted 10 species on a custom-built 1.4m green wall.