Any suggestions for this

View from the other side of concrete slab.
Pergola phase 1 complete, posts primed, painted and planted!

 

Am I correct in assuming those are 18" x 18" (450 x 450mm) precast concrete slabs and therefore that in-situ concrete base is approx. 8' x 15'? I'm sure I've seen hybrid summer house/greenhouses at garden centres of around that size, although you'd be limited to growing stuff in pots/containers, but might be preferable to a fully glazed greenhouse if there's little one(s) whizzing about on the paving.

 

Raised concrete size is 18ft x 9ft, I've powerwashed yard again and its come up not too bad and don't look as ugly, may just position planters and chimnea for this year or until choose whats best.
Can anyone advise on how to stop water runoff from hedgerow at back. I've removed 1 inch of compost/soil but theres only 1 inch height between concrete used to secure edging kerbs and top of kerbs, seems this is why paving is getting so dirty each year.
In the other corner pergola and fence complete, just need to paint fence and finish gravelled area with maybe paving circle or pave most of area leaving some planting space. Glad to get a rest soon!

 

That's a pretty substantial arch. Did you build that yourself?

 

Yeah, First thing I've ever built that size, and first fence too. Jigsaw, circular saw and plenty of patience!