Posted: 27/04/2015 at 20:46
You could do with a book on shrubs. That could give you an idea, then Google them to find out more. There are a lot of spring and early summer flowering ones, such as lilac (normal and the little leaf one), forsythia (if you like yellow, some don't), deutzia (many sorts, small pink to big white), philadelphus (white, tall, perfumed), weigela (pink, red, variegated, kolkwitzia. Also shrubs with different leaf colours, such as Choisya (ternata has evergreen shiny green leaves, Sundance has evergreen shiny golden leaves, Aztec Pearl has evergreen smaller green leaves, masses of white flowers in spring), Sambuccus Nigra Black Lace, euonymus with variegated leaves.
For later summer and Autumn there is Fuschia Riccartonia which is a hardy fuschia, Ceanothus Gloire de Versailles (may need a sheltered spot, buddleias, Vitex agnus-castus (grows quite big), Caryopteris (not big)
It also depends on soil, all the above grow in my rather alkali soil. Many other shrubs for acid soil. It depends on light and sun and dry or moist. So there is a lot to find out! But fun doing it.
All shrubs need extra watering the first year until they become established. Most will need some sort of pruning, late flowerers in early spring and early flowerers after flowering.