How close to a hedge can I spray weedkiller

QuestionsHow close to a hedge can I spray weedkiller
Mary Keane Staff asked 15 years ago

We have an escallonia hedge with the kerbing varing from one foot to three foot out from the hedge, the area has a weed barrier and stones and is unplanted. Frond like weeds appear between the hedge and the kerbing which are a melt to pick. I was wondering if I could spray roundup on this area and if so how close can I spray to the hedge?