there is perennial gypsophillia that comes in pink and white forms.
then there are annuals such as cosmos, nigella [also pink forms].
Cleome might be a little too tall but worth considering.

Thanks Eileen. I love the idea of gypsophilia - nice and frothy - and I think I might have some Cleome seeds somewhere. Good thinking!

My first thought was of gypsophila, too. How about the lovely double Geranium Pratense 'Laura'? I also thought of pink or white lavatera but maybe the flowers aren't small enough for the effect you're after.

Thanks Ange. I do like lavatera, but the shrub would be too big for my front garden. The Geranium is a great idea, and I have just seen a photo of Stocks in The English Garden magazine, so will look out for seeds of those too 🙂.

I was thinking of the Musk Mallow: malva moschata which comes in both colours and self-seeds. Sorry, put the misnaming down to a senior moment!

Ah, well, they’re very alike Ange, and now that you’ve reminded me I love that Malva moschata Alba and it seeds itself everywhere. A good one!

Btw I asked this question on Gardeners Question Time years ago and they came up with Tiarella, so I ought to look for that as well.

Ooo - 'fame at last' as they say.
I have tiarella, put it in the shadiest position (not in the dark!) and it's half-hearted. It's a shame because I love it but it's not so keen on me!

🙂 by the way - should have said - I like your new Avatar.