Flowers for the rest of summer into sept/Oct?

[Vodkacranberryplease]

What plants have you found reliably flower till first frosts without needing a full days sun?

Long flowering wise I've got salvias, snapdragons, lavender, cosmos and aquilegia so far plus geums and campanula in pots.

I've got a long narrow garden with two borders (east and west) that get a few hours at the front on each one but then have bits in the middle/at the back with dappled sun/not much sun. I've got millions of pots that get about 3 or 4 hours of morning sun and big planters that get a few hours too.

I put poppies in the front of my west facing border (shorter hours of sun but hot) and am thrilled to see them flower but have found out they will stop in June. There's gaps between them and a bigger patch in a slightly more shaded corner.

Any suggestions for something that will flower all summer, that I can actually get hold of? To go in between the poppies, in pots and window boxes (I've got bacopa but it didn't like the window boxes once it got too hot) and in a few largish bits of empty space? Plants are hard to get and the ones I'm seeing are ones I don't know very well.

I've also got some saxifrage, and rock roses, but I don't know if they will flower long enough and they don't seem to like too much sun do currently in little pots. I've got a few of the aster family (yellow) on the way too.

Usually I'd just go to Homebase but that's impossible at the moment and there's bigger all there when you do go.

One of the longest flowering plants in my garden is a Lavatera (Barnsley Baby). It’s started flowering this week and it will flower until the first frost. I grow mine in full sun, but according to Google it will tolerate semi-shade

Other long flowering plants:
Geranium Roxanne (it prefers full sun, but will I believe tolerate some shade)
Fuchsia
Some clematis flower for a long time. It will be flushes of flowers, rather than continuous flowers

If you have at least 4 hours of sunshine, some roses will be happy too. If you look on the David Austin website, there’s a special section for shade-loving roses

Dwarf Asters and Osteospermum, are both large daisy like flowers and will go on flowering until the first frost.
In fact my Osteospermum overwintered and are now huge. To keep the flowers going you must remove all the faded blooms.

I've found that wallflower bowles mauve flowers pretty much all year round, I have bought them from Morrisons before (if you have one nearby).

Lovely! The lavatera is a new one - though I have Bowles mauve in a small border gosh it's prolific and a David Austin climbing rose for shade - first years its flowered which has been exciting.

Aster/Osteospermum are on my radar so will order some plus lavatera. Bought geranium this year yet to flower though. It's truck because you find out almost by accident what little troopers some plants are.

My Homebase indoor jasmines are doing well outdoors in very much semi shade and seem to not like too much sun at all.

However I've not managed to get sweet peas working!