Humph - totally know what you mean re thinking space. Gardening is when I process a lot of stuff mentally, but obv only when DH or somebody is watching DS
Have no idea where Malvern is, sorry! My geography, along with knowledge of flowers and public gardens, is generally zero. 
Bertha - what about twinkly fairy lights? I think I saw some LED ones in Ikea the other day, I've used LEDs for Xmas outside (3rd yr now)and have never got round to taking them down
, but they're still going strong! Arbour sounds luuuurvely.....(goes into lovely bucolic daydream)
Wynken - my peonies are from Poundland! Stuck them in and they just carry on, despite dog's best efforts at trampling new border. Have 3 in multipurpose compost in new bed, and last year stuck them in existing very heavy clay. They've all come up, somehow 
Maud (or anyone really!) is it too late to divide hostas? I have a huge one that's just got tiny shoots on (less than an inch high) but it's so old that i can't get a spade into it... any tips?
thanks x