Purple and yellow make a pretty combination. The blooming time of the purple Campanula glomerata (clustered bellflower) and yellow iris overlap right now, and I appreciate the look of these two flowers together.
The C. glomerata isn’t fully out yet, since the buds are just opening, but I couldn’t resist snapping these photos now. There might be a windstorm, or hail, and I’d miss this lovely combination. When the clustered bellflower opens fully, the bloom is a round ball about 7 cm ( 3 inches) across at the top of the plant. They are a bluish purple as many of the bellflowers are. The blossoms usually last about 2 weeks. Sometimes the older plants will rebloom with smaller blooms from the leaf axis, if they are deadheaded.
It’s a good idea to deadhead anyways, since this bellflower spreads too easily. You have to be ruthless with C. glomerata, or they take more than their fair share of space. The plant itself is not as attractive after blooming. The foliage is not great, and they tend to flop over after the heavy flower. They tolerate semi-shade, but get even floppier with more shade. However, when it is in bloom, it looks fabulous. The colour looks terrific combined with light yellow. I’ve combined it with pink, which looks good too. It’s difficult to recommend it wholeheartedly though, because of its spreading nature and downhill slide after blooming.
There are more Campanula (bellflowers) in my garden just starting to open now. Most of the bellflowers start blooming in my garden around the first day of summer or shortly after. I’ll post more photos of the other types of Campanula when they open more fully. They are one of my favourite genus. There is a wide variety of species of bellflowers, from tiny rock garden plants to taller specimens. I had a larger collection of them at my last house. Many of these perennials come in various shades of bluish purple to purple, as well as white. They vary in their ability to handle shade, but most are relatively easy care and adaptable. This post has more details about bellflowers for zone 3 with photos and descriptions.
You can read about some of the iris I grow here.
Do you like bellflowers? Which are your favourites?