Looking to add a pop of blue to your flower beds? These stunning blue perennials are the perfect way to bring some cool, vibrant color to your landscape. Here’s a breakdown of my favorite blue beauties and why they deserve a spot in your garden.
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++Blue Eryngo / Sea Holly (Eryngium planum)
Sea Holly is a unique, thistle-like perennial that provides gorgeous blue blooms for years. The flowering season kicks off in June, and the best part? Even after the flowers fade, the dried seed heads look incredible. Many gardeners leave them standing through the winter for some extra architectural interest. These plants can reach up to 30 inches tall and absolutely love soaking up the sun.
++Viper’s Bugloss (Echium vulgare)
If you want a vibrant blue that makes a statement, Viper’s Bugloss is a fantastic choice, especially for front yards. It’s a total bee magnet, providing a vital food source for many wild bee species. Make sure to plant it in a warm spot protected from the wind. If you look closely at the blue flowers, you’ll see red styles poking out like little snake tongues—which is exactly how this popular perennial got its name!
++Liverleaf (Hepatica nobilis)
Liverleaf is a real treat during its blooming season. These flowers are dainty and understated, but the color is so intense that they really catch the eye. Growing only about six inches tall, they are the perfect solution for those tricky shady or semi-shady spots. Even without a ton of direct sunlight, this little plant will put on a beautiful show.
++Cranesbill “Brookside” (Geranium “Brookside”)
Hardy Geraniums (or Cranesbill) are a staple in classic cottage gardens for a reason—they are tough, low-maintenance, and reliable. While they come in many colors, the “Brookside” variety is a standout for its stunning blue petals. Plant these, and you’ll have a lush carpet of blue to enjoy throughout June and July.
++Delphinium
When people think of blue flowers, Delphiniums are usually the first thing that comes to mind. They add a wonderful romantic, old-world feel to any garden. Just a heads-up: they aren’t big fans of extreme heat at their planting site, and slugs tend to love them as much as we do! There are plenty of varieties to choose from, so pick one that fits your height and color preferences. With nutrient-rich soil, you can expect those iconic blue spires to start appearing in June.
++Bearded Iris (Iris barbata “Ohrid Strain”)
If you’re looking for something elegant and sophisticated, you can’t go wrong with an Iris. The Bearded Iris comes in some truly spectacular shades of blue—the “Ohrid Strain” is a personal favorite for its deep, rich hue. Irises generally love the sun. Just make sure your soil drains well, as they don’t like having “wet feet” (standing water) around their roots.
++Catmint (Nepeta x faassenii)
Catmint offers a lovely, hazy blue bloom that looks great in any border. It gets its name from the intoxicating effect it has on our feline friends, but humans usually find the herbal, citrusy scent quite pleasant too. Interestingly, while cats love it, voles and other rodents tend to stay away from the smell—which is a pretty great bonus for any gardener!
++Armenian Speedwell (Veronica armena)
For a blue-flowering groundcover, Armenian Speedwell is a top-tier choice. It forms beautiful, low cushions that spread about ten inches wide. It’s an early bloomer, too—you can expect to see its blue flowers as early as May, often beating many other perennials to the punch.