What weed killer to use around the base of a hedge?

Answer 1

Roundup can be used if you are careful when applying it. Do not get any on the leaves of the hedge. Since you're weed problem is at the base of the hedge this product may work. Roundup is a systemic herbicide; that is, the poison is carried through the plants system fist by entering the leaf and then destroying the plants roots.

Answer 2

A good general purpose herbicide is glyphosate commonly known as Round Up. If you look for glyphosate you should be able to get it much cheaper (almost half if not more) than its trade named Round up. You have to be careful using glyphosate as it will translocate (move through the plant). So if you hit a desired plant you may kill it. Alternatively you can use a product called Buster (Glufosinate-ammonium) this is a contact herbicide and will only kill the green tissue that it comes in contact with. This is more expensive but if you don't have a steady hand would be the best option. Hope this helps.