Hi-Yield 2, 4-D Selective Weed Killer is not labeled for trees or similar brush, so it will have little to no effect on the young pines or seedlings. For post-emergent control, you can spot treat with a non-selective herbicide such as Fertilome Brush Killer and Stump Killer with Triclopyr.

What herbicide can I use around trees?

Those containing glyphosate, for example, typically are safe to spray around mature trees. The chemical doesn’t leach through the soil, so it shouldn’t reach the tree’s roots. Sethoxydim, another herbicide active ingredient, also is deemed safe to spray under trees to eliminate grass and weeds.

Can you spray for weeds around trees?

Remove the grass Before laying down the mulch, you’ll want to get rid of the grass around your tree. To do this, spray Roundup® Ready-To-Use Weed & Grass Killer III, then wait just 24 hours before proceeding with your project.