A benefit of surviving a hot, humid St. Louis summer is that sub-tropicals perform well here as annuals. My list below includes annuals I’m obsessed with that are common in the south, but also pack a punch here in the Midwest. Or maybe I’m obsessed with these selections because they are a throw-back to my early 20s, when I lived in Houston, TX, where I was able to admire these plants day in and day out. Either way, these plants bring up the garden energy a notch and provide a leave me with sense of joy long after their beauty has faded. Most on the list I plant each and every year; while Canna has yet to join the backyard annuals.
What annuals accent your garden?
Canna. No, St. Louis is not the tropics, although a sweltering July or August day will give zones 8-10 a good run for their money. I do not live in the right zone for this plant, so it is classified as an annual here, but, yes, I’ve got to have this plant. I promise to shelter it from harsh winds and give it the full sun it requires and I am confident this tall, handsome plant will return the favor with gorgeous foliage that climbs the length of its 8-ft height and an unfurling of vibrant, ruffled flowers.
Caladium. Arching gracefully above the other mix of annuals in my window boxes on the front of my house, caladiums provide a little bit of that extra curb appeal I’m looking for every summer. And they give me the height I am looking for…not too tall, but just enough to draw attention. Their variegated white/green/pink foliage provide a nice pop of color in the shade, and I adore their arrowhead shape. So pretty, you might forget they’re not a flower.
Mexican heather (cuphea hissopifolia). Some like it hot and this baby really performs when the sun beats down…as long as it receives a restorative drink of water each day. Looking for a plant that seems to be in constant bloom? Mexican heather is the perfect choice, as it always has small purple blooms among its glossy green leaves. I have incorporated this annual into my potting scheme for several years now and have never looked back. Typically I fill a pot with a variety of annuals for visual interest, but not with this one. She gets a pot all to herself.
Nicotiana (nicotiana sylvestris). Known as flowering tobacco (for the shape of its leaves, I suspect), I am a big fan of this guy. The bright, star-shaped blooms on this annual really know how to show off. And when daylight gives way to evening, nicotiana lets of a fragrant scent that’s sure to make you slow down and take notice. I have typically planted this in pots but this year I intend to give it a go in the garden bed to accent “Spruce Springsteen,” the name we have affectionately given the dwarf Colorado blue spruce that I planted a year ago. I gave Spruce lots of space to accommodate its girth, which won’t happen for a few more years. Nicotiana will be a nice way to fill up the mulch bed.