Campanula in the garden wall

[Thingsthatgo]

I live in the south east, and campanula seems to grow on everyone's garden walls expect mine! It looks especially beautiful this year.
I've got a wall with some mortar gaps that would be perfect - could I chuck some seeds into the gaps? - would you make a compost and seed paste and spatula it in? My daughter made seed bombs recently- I could make campanula bombs.
What time of year would work best?

Hopefull bump in the hope of some knowledgeable replies as I have the exact same question!

I have masses of campanula that grows in the cracks in the wall, but it never flowers. I’m following to hope for some tips.

I think it’s quite moody, I’ve got loads in my front garden but have tried transporting some to the back garden and it hasn’t taken. So maybe seeds might be worth a try.
Sorry I realise that doesn’t actually answer your question!

I’d give it a shot, I’ve some,previous owners must have planted it just flowers every year.

I think I’ve finally cracked this after moving a couple of years ago and enviously realising that my neighbours have amazing wall displays. After some trial and error, I’ve had success.

I’ve used both campanula and aubrietta. I didn’t use seeds but bought plants and then placed them into the crevices on the walls with some John Innes no. 3. I’d say my success rate was about 50% so place more than you need with the hopes of them taking. Don’t let them dry out.

The ones I planted last year have come back this year and spread a bit. Will take a couple of years to achieve the growth I’m looking for, I’d say.

@Teq oooh lovely. Maybe I'll buy some small plants and push them in the gaps. Thank you for the tips.

I thought you meant crevices on a vertical wall. What I’d do is fill the entire “trench” with compost and plant up as a normal garden. My wall has, from L to R: candytuft, trailing rosemary, winter savory, aubretia, lavender, more rosemary, Armeria, golden oregano, Armeria. And as we move round to the shady bit, Snow in summer, Nottingham catchfly, wallflower, ladies bedstraw, more catchfly, Centranthus ruber and grape hyacinths