Moonlight2

Unknown Weed

There's a really nice ornamental cultivar, called C. 'Brazen Hussy'. It has the same lovely yellow flowers, but amasing burgundy leaves. Choice. And it doesn't spread like the wild one. I reckon it's mice that spread the wild one about. It's nice, but if it likes your soil, it can turn into a real pest. I notice there's some small bits coming up again in my garden, and there's me thinking I got it all out last year!

Planting between grasses

I love your garden! Can I add to the above excellent lists? Achillias, some lovely colours about these days. And Scabiosa, again, some fab cultivars available in several different heights and colours. Lastly, Knautia, which is similar to a Scabious, available in a bigger colour range now. All of these are 'airy' plants which will compliment, but not dominate your grasses. They all have pretty good seedheads that stand the Winter well. Have a google!

Scented flowers

My fave rave at the moment is Daphne bholua 'Jaqueline Postill', beloved by Roy Davison. It's a slow growing semi-evergreen that will get to 6ft. They are devilishly expensive (£30-60) but will reward you for weeks with their waxy very fragrant flowers. They do like a little shelter, but this helps the fragrance to linger. May I also add V.carlessii to the above list. Deciduous to about 4ft, huge pompons of lily-scented white, flushed pink flowers, now. Both are well worth a go for this time of the year. Underplant with Eranthis corms and you'll think you've gone to heaven!

You'll go a long way to beat the fragrance of Lilies for the summer. I always sprinkle some 'Night-scented stocks' around seating areas that we sit in in the evening. They look very un-promising, but pack quite an aromatic punch.

Unknown Weed

Yes, it is Celandine, and as Sue8 says, it is very difficult to get rid off. It can be dug out, but the roots sometimes go up to 8" deep. You must get all the little root 'nodules' out or new plants will grow. Little and often to try to eradicate it is the answer, whenever you see it dig it out thoroughly. You could try spraying with Glyphosate with a little washing up liquid added, if that's practical, as this will help it stick to the very glossy leaves better. Make sure you don't spray any plants you want to keep. Sadly I can sympathise with you as I seem to have imported it into my new garden, I suspect, in Council compost!