Canna yellow mottle virus (badnavirus) CaYMV and canna streak virus CaYSV are two to bring the most concern. In the last years many of the world's cannas have become infected with viruses that spread easily and bring down the health of the plant even to where it will die. This is the time to divide the rhizomes to be planted in pots and kept in a warm place to get them going, or if the ground is warm enough to plant outside and begin the season anew.
In spring the cannas will start growing again.
Bring the clump inside (45-55º F temps are ideal) where it will store, and fold the trash bag loosely over the top to let air circulate but keep moisture from evaporating, Check every few weeks and add a little water from a spray bottle if the clump is starting to dry. Shake some of the loose soil and place the clump inside a large drawstring stretchy trash bag. Dig around the clump with a fork being careful not to damage the rhizomes and remove it from the ground. When frost takes the foliage and at some before freezing, cut the cannas down leaving a several inches of stem in place to use to handle the clump. In colder climates of zone 7 and lower, unless planted along a warm foundation, canna rhizomes should be lifted and stored in a non freezing place during the cold months. However, in the cooler areas, they will have added benefit by adding several inches of mulch to the beds in fall as protection from possible freezing temperatures reaching them in winter. In warmer climates zone 7 1/2 and above, cannas usually can winter in the ground right where they grow. Variegated and dark canna leaves are especially lovely when used alone or in combination with other flowers. Canna blooms are also not fragrant.Ĭanna leaves work beautifully, also, and will last a long time in arrangements. They can be grown singly in pots and also in larger pots as part in combination plantings.Ĭanna blooms work beautifully in arrangements but last for only one day.
At this time, cannas can also be helped along by applying half strength liquid fertilizer, and also every other week or so to keep them going to enjoy them to their best.Ĭannas also perform excellently when grown as container plants. Keeping a thick layer of mulch around the plants will conserve water and keep weeds down. When new growth appears cannas can be watered more heavily and tolerate wetter soil. If setting out plants, set them to their soil level and firm the soil around to hold in place. Plant rhizomes horizontally and approximately 3 inches deep and 2-4 feet apart depending on variety. Or in cooler climates they can be started sooner indoors or in a greenhouse to set out as plants when the ground and temperatures are warm enough.Ĭhoose a sunny location with a minimum 4-6 hours of sunlight (the more sun the better) and prepare the planting area so the soil is loose and amended well with good compost. Cannas are tropical perennials that with a little care can be grown just about anywhere in the world.Ĭannas can be planted outside in the early spring after the last frost in your area.
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