Seeds to " plant" in paving cracks now?

hollydays

I was just wondering if this short spell of warm weather would be a good time to encourage flowers to grow in paving cracks. I'm discouraging plain weeds and encouraging pretty weeds to grow. Or is is totally the wrong time?
I'm thinking of yellow Welsh? Poppies and Erigeron fleabane , As I already have these plants.
I'm particularly interested in how to encourage fleabane to grow in a wall.do I need a clay type soil mix?

REEN

This is the time of year when the self-seeders sow themselves, so that seems reasonable to me.

I've never encouraged them much, just let them get on with it, so I don't know about getting them to grow in a wall, sorry. I've seen lots of valerian growing between stones in walls, seems quite happy there. I have erigerons and violets in cracks too, they are pretty. I love verbena bonariensis, it never comes back when I plant it out but it's set seed inbetween the house wall and paving all by itself and is thriving.

hollydays

Reen wrote: »

This is the time of year when the self-seeders sow themselves, so that seems reasonable to me.

I've never encouraged them much, just let them get on with it, so I don't know about getting them to grow in a wall, sorry. I've seen lots of valerian growing between stones in walls, seems quite happy there. I have erigerons and violets in cracks too, they are pretty. I love verbena bonariensis, it never comes back when I plant it out but it's set seed inbetween the house wall and paving all by itself and is thriving.

Thanks- yes that makes sense. I'll plant them there now then. Thanks.