Bit far away, the first two pics, but the top one's probably Pieris, doesn't need pruning, but if you must do it, trim it after its flowered, the second pic is Chaenomeles I think, usually grown up a higher wall than that and pruned after flowering, not sure what the bottom one is with the yellow flower.

1. Pieris, no prune unless you feel the need to stop it from growing naturally! 2, Chaenomeles, mid-spring, after flo as Bamboo says, and sometimes a summer trim will aid the production of fruiting wood, but just a trim of the longet new growth, and
3, day lily. Leave it alone or lift and divide in spring, if you need to. It's a tough plant, so if you get it wrong, it'll correct that wrong for you.
Phil J

The botanical name of a Day Lily is Hemerocallis, just to add that.

Ah Spritz you beat me! I was going to say Day Lily.

Well, I might have, only Aimankay asked for the botanical names! :-)