The one in the front is the younger and smaller of the two, though neither have (yet) grown into real trees, as they sometimes do.
The flowers of the one in the front are the darker of the two:
The one in the back has lighter flowers. The inside of each petal is markedly lighter than the outside, too:
I've noticed, driving around, that often plants bloom a little later here in our garden than they do in gardens not that far away. Is that an indication that our yard has a slightly cooler microclimate (certainly doesn't feel cooler in the summertime!), or is it more a reflection of variations in soil/water/fertilizer/etc.?
