Best way to kill Elder in a hedge
I put a native hedge in two years ago which has done very well, but I included a few Elder in the mix which I now think was a mistake (the rest of the hedge is made of Hawthorn, Blackthorn and a few others, as well as probably too many dog roses). The Elder have outgrown everything else significantly, and I think on balance it would probably be better to remove the three of them now and let the rest of the hedge fill in. They are small enough in the trunks to chop down easily enough (although already perhaps 9 feet high, despite hard cutting back last winter), but how best to kill in situ? I don't really want to go digging up the roots as there are other plants nearby. I've never used weedkiller before but I would consider it if it is the best way to go. What would be the best procedure? Cut down and paint neat glyphsphate on the stumps, or spray leaves? Would this be a good time of year to do it? I also think I might get rid of one or two of the dog rose. Same sort of procedure?