Glyphosate - a question

[Scrambled]

Our garden has mare's tail, ground elder, red clover, orange hawkweed and creeping buttercup in absolute abundance - if we grew it commercially, we'd be millionaires. When we moved to the house we decided that we'd try to tackle the weeds before planting up our new garden - and by digging, not by using weedkiller.

After a couple of years of this, and being sick to death of gardening solely = digging up perennial weeds, we've bought some glyphosate.

At the same time, I do want to start getting some plants in and getting the garden established because we've had two years of bare soil - well, bare except for the weeds

My question is: if used VERY carefully, is it safe to apply glyphosate (maybe with a very small paintbrush) to the perennial weeds as they pop up, even if they are in amongst other plants? I realise that I need to make sure the glyphosphate isn't accidentally applied to any other plants, but does anyone know if being in close proximity to plants I want to keep could be a problem?

I have loads of lavender plants that I've grown on from plugs which I'm going to make a lavender hedge with and I need to get them planted out soon - if (when!) mares tail pops up around the lavender, would it be save to use the stuff on the weeds?

[Totally Scrambled]

As far as I know it is only when it is wet that the glyphosate can cause damage by a plant brushing against another one coated in it. Once it has dried it shouldn't affect another plant next to it.
When I have spot weeded I cut the top and bottom off a 2 litre plastic bottle, place it over the one I want to kill and spray inside it so there is no spray going where I don't want it to. You could then always leave the bottle in place until dry to make doubly sure none gets on the plants you want to keep.
Dom

[Scrambled]

Thanks for that - great idea re: bottles