If there is poison ivy on your property, late summer is an ideal time to treat it with a
herbicide. The full-grown leaves of mature plants provide lots of surface for the spray to
adhere for the maximum effect. Spray poison ivy before the plants have berries; otherwise birds
will carry, drop and spread the nuisance.
Use a non-selective herbicide such as Roundup, but be aware it will kill any plant the spray
may contact. Spray on a windless day and follow all the directions on the product label
carefully. Allow 10 days for signs of success. Very woody poison ivy vines may need a second