Hi,
Pictures of plant 2,3,4 are perennial candytuft, Iberis sempervirens. Prune directly
after flowering by light trimming with shears, or by cutting back somewhat harder if
it has got too big.
Plant 6,7 is a Deutzia possibly 'Deutzia x hybrida'. The Deutzias are very good
early-flowering hardy shrubs. Be careful to prune them correctly though, straight
after flowering, by cutting back all the wood that has flowered to a new shoot which
you should find growing from lower down on the branch.


Regards,
Chris King from Somerset