Spirea’s contribution to any landscape consists almost entirely of a massive springtime display of small white, pink or red flowers. Spireas grow to be about 3-5′ tall in a globe like shape. They grow about 2-4″ a year. Spirea’s need full to partial sun, but don’t tolerate a lot of shade well. If you need a plant that will serve almost any purpose, you have to have a spirea in your yard.