Crocosmia,'Lucifer' ,and Yellow Lysimachia,in front of them,for support? both tall,and look good together..but maybe you want something longer lasting? just a thought,but no doubt you will get lots more ideas,Karen..

Thanks Bllomer. I have yellow Lysimachia in the golden border. Does Lucifer really get that tall? I've always thought of Crocosmia as a three foot plant!

Mine are huge,Karen..you may be thinking of the shorter varieties,but Lucifer is a 'in your face' red ! it doesn't get much hotter :o)

Thanks! :))

Recent photo on Page1,end of 2nd row,if you want to check it out.Karen..Even bigger now,and had to support them..

Helenium autumnale - 5 ft, Helianthus decapetalus also 5ft. I had a great long list but lots were only up to 4ft tall. I've seen tall Turks head lilies which thrived in a sheltered position but can't remember what colours they were. Lilium Shuksan Bellingham hybrids - 7ft tall.

I'd say heleniums as well, although you may need to protect the young growth from slugs if your garden is anything like mine.

Heliopsis, Phlox paniculata, some of the taller kniphofia, Lythrum salicaria, arundo donax versicolour (i know, it's a grass), Eupatorium purpureum

Thanks! You've mostly suggested Helenium, which is what I am already growing there....I need something to go behind them! I have a 'Lemon Queen' perennial sunflower, and need something to go beside her. Similar height. I might just get another Lemon Queen and use her as the backdrop across the whole width of the border. That is probably the sensible thing....or the really tall Inula. I've always fancied that, and this is the perfect spot for one. I may go shopping today and see what is in the Nursery at Arbroath. They always have lots of gorgeous perennials. Thank you all very much! The tall lilies sound lovely too. Thank you everyone!

And silphium perfoliatum grows to seven feet or more (I posted a photo of it recently)

Ooh, never heard of that Andrew....off to google it now!

now you've reminded me of Ligularia....would be super there with it's deep red leaves. The clay may also hold enough moisture for it.....another possibility! Thanks....don't know why that plant made me think of Ligularia......the way my mind works is a mystery, even to me!!

I have eupatorium chocolate (Ageratina) that's about 5ft at the moment but it does have white flowers? :) I'm thinking of foliage aren't I soz!

That's ok Daylily. I've bought two Ligularia Desdemona which look lovely against the backdrop of dark red ACer, and an Angelica Gigas. It all looks nice, and next year it will look super when the heights are corrected!

Heliopsis helianthoides

That's a great suggestion Badfish, and very similar to helianthus lemon queen which is already in situ. Thank you. :)

Filipendula 'Venusta' ?

Oh yes, that's a lovely one, but the wrong colour. I had that in my old garden. I chose LIgularia and Angelica Gigas in the end. :)

Sounds fab, look forward to seeing it :)

Hi Karen, how about some Aster novae-angliae, for some late summer colour, some of these grow to 5ft, Derek.