Summer is a bit late in coming this year, but normally in the UK and northern Europe the elderflower blooms. As I understand it the flower typically blooms in late may and June, but they have been in full swing this year in the second half of june and now into July. They are quite nice turning an otherwise dull bushes into brilliant colored trees. Take for instance this picture below of the elderflower growing out of the old church across the road.
Here is the same location a few weeks back prior to bloom. In addition it turns out that it can be used to make a very nice (non alchoholic) beverage referred to as Elderflower cordial. I probably will not end up making it on my own but I did end up buying some pre-made elderflower sparkling beverage from a local UK farm.
Kelly and I sampled it last night while enjoying the nice summer evening and it was really good. It actually had a very light, flowery taste to it.
Also - here is a good article on the elderflower as well.