[Jane Doe]

Can anyone recomend a selective herbicide - brand name- to kill grass that is growing up around trees/ivy/heathers

[tippben]

You could put glyphosate (roundup/Gallup) in a small sprayer (bought, or a rinsed out domestic cleaning product sprayer), and apply it from a few inches away. You could also use light suppression - black plastic, mypex or polythene, or if you prefer, cardboard weighted down with stones.