Using Glyphosate Safely Near Valuable Trees

Controlling a privet hedge growing beneath a mature oak requires precision. Glyphosate (the active ingredient in Roundup and similar products) is primarily absorbed through foliage, but it can damage trees if it contacts trunk bark or exposed roots in significant amounts.

Safe Application Protocol

Spray only the privet leaves, using a shielded sprayer or cardboard barrier to prevent drift onto the oak's trunk or root flare. Apply on a calm day with low pressure to minimize atomization. Avoid saturating the soil around the oak's root zone. With careful technique, you can eliminate the privet without harming the oak.

Alternative Consideration

For maximum safety, consider cutting the privet stems and painting the fresh cuts with concentrated glyphosate using a foam brush. This targeted approach virtually eliminates off-target exposure.