Posted: 11/07/2013 at 10:31
As i have dug & removed the heavy stones at the bottom, i can see some roots go through the pea gravel trench and immediatly under the patio flags. These flags have been (well) laid on dry sand cement that has gone off, so ideally I don't want to lift or move these if at all possible.
How they can grow / spread through this I don't know but they do. Obviously I can cut the roots off as they go under at the edge but by doing that, will they actually survive under there as, the roots have come from the soil beds, where I assume they took the required nutrients, water? Or will they just re- root under there (as I say, there is a good depth of sand & cement).
Equally, at the top, roots shoot off under the lawn, I have not cut these yet and wondered if I could treat the roots as opposed to the foliage? Maybe sit hem in a weed emailer suction a lot solution?
Also, I have seen elsewhere that some people have used vinegar to spray the foliage, anyone confirm if that works?