Cannas add tropical punch and provide background to perennial blue salvias.

Recommendations on planting and caring for cannas in summer time and overwintering

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I contemplate myself an equal-opportunity gardener within the sense that I wish to develop quite a lot of completely different vegetation in my garden and residential panorama. Like most gardeners, I recognize the ecological worth in having a large variety of flowering vegetation, and I get pleasure from quite a lot of completely different colours and sorts of flowers, foliage, and plant-growth habits.

One flowering plant that had been lacking from my panorama till the previous couple of summers is the stately canna. These tall tropical-looking vegetation with banana-like paddle formed leaves that wrap in orderly ruffles across the stems, have grow to be the point of interest in a number of completely different plantings in my panorama.

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Wanting on the flashy and flamboyant pink, orange, yellow and pink flowers of those vegetation, I now marvel how I ever lived my summers with out these spectacular specimens.

Mike Hogan

Point of interest of any planting

Cannas can be utilized in lots of garden and panorama settings as each focal factors and enticing accents. Cannas are tall vegetation, with most varieties reaching 4 to six toes in top. Some monster varieties can attain as much as 8 toes tall! Due to their top, cannas can convey construction as a tall border; as a backdrop in a flower, perennial, and even shrub mattress; or soften the peak of buildings and raised decks within the panorama. There are additionally smaller dwarf styles of cannas.

You probably have a water characteristic in your garden or panorama, attempt including a canna or two for an immediate tropical contact. Cannas additionally function spectacular vertical or “thriller” vegetation when utilized in containers together with different flowers which have creeping, mounding, or spreading progress habits.

Whereas the flowers are the point of interest of canna vegetation, all kinds of foliage colours and patterns exist, including visible curiosity to the plant. Many sorts characteristic variegated foliage with streaks of yellow, pink, orange and cream colours highlighting the over-sized leaves.

Cannas add striking verticality to container plantings.

Some pollinators are interested in canna flowers, and in my panorama, hummingbirds appear to want cannas over different flowers that they’ve sometimes visited.

They don’t seem to be true bulbs

Cannas are generally known as summer-flowering bulbs, though technically they aren’t bulbs. These vegetation multiply beneath the soil from a rhizome, which is an underground stem that grows horizontally. Cannas are tropical vegetation and as such,  require a good quantity of full solar, ideally a minimal of 6 hours of direct solar every day.  The vegetation will tolerate some shade and do nicely in areas with quite a lot of filtered or dappled daylight within the afternoon and night hours.

Cannas require fertile, moist soil, so in case your soil shouldn’t be excessive in natural matter, loosen the soil to 12- to 14-inches-deep and add some compost or peat moss to the planting gap. Cannas don’t tolerate chilly soil temperatures, so these are usually not the primary gadgets I plant every spring. They’re really the final flowering vegetation that I plant, and by no means earlier than Memorial Day. I planted the final of my transplants this previous week, and nonetheless have a number of in pots in want of a house!

Cannas come in a wide range of colors including yellow.

Whereas canna bulbs can be found for buy at some garden facilities every spring, many extra garden facilities provide these vegetation as transplants rising in pots, which at this level of the rising season is the very best methodology for planting cannas. 

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Caring for cannas

Cannas do greatest in moist soil and require a considerable amount of supplemental irrigation for full flowering, particularly throughout the hottest and driest instances of the summer time. A layer of mulch helps to retain soil moisture. An entire fertilizer reminiscent of 10-10-10 or 5-10-5 utilized two or 3 times all through the rising season will lead to continued flower growth nicely into the autumn months.

As flowers fade, fastidiously deadhead spent and browning flowers, taking care to not take away further flowers situated instantly under spent flowers. After deadheading a stem a number of instances and with no further flowers forthcoming on the stem, lower that stem again to the leaves. Every plant will produce a number of further stems all through the rising season.

Cannas are usually not liable to illness except they’re planted in dense stands in very moist circumstances, and barely are harmed by bugs, though some bugs could feed on the big leaves.

Digging cannas for winter

Canna rhizomes should be dug within the fall and saved every winter indoors. Cannas planted in containers can merely be moved right into a storage or basement for the winter. Whereas the duty of digging the rhizomes can appear to be a chore (it really stored me from planting them for years), the reward is that the rhizomes significantly enhance in measurement throughout the rising season and will be damaged into a number of completely different rhizomes, every of which will be planted subsequent spring, significantly rising your canna holdings!

When digging the rhizomes, fastidiously take away all soil after which lay them out to dry in a shed, storage or basement for a number of weeks. As soon as dry, the rhizomes will be saved in containers indoors with some peat moss or shredded newspaper sprinkled between the rhizomes.

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Within the spring, rhizomes will be planted straight within the floor as soon as the soil temperature reaches 65 levels Fahrenheit or they are often began indoors in pots in late winter after which transplanted outside. 

The unique three cannas I planted three years in the past was a dozen vegetation final summer time, which yielded three dozen vegetation this spring! 

Mike Hogan is an affiliate professor at Ohio State College and an educator on the OSU Extension.


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