What happens if I don’t dig up my canna bulbs?
In colder areas north of zone 8, these tropical beauties won’t survive in the ground during winter. Gardeners in these regions can either treat cannas as annuals, discarding them after the season, or dig up and store the bulbs for replanting in spring. After planting, it may take 2 weeks or more for the first shoots to appear. Once that happens, the plants grow quickly. During the growing season, cannas appreciate a monthly dose of liquid fertilizer. This is especially true when they are grown in containers.The ideal canna bulb planting time is in the spring after the last frost has passed and when soil temperatures have warmed to at least 60°f (15°c). Depending on your location, this usually falls between late april and june.Creating a tropical look with cannas is fairly easy as long as you remember a few things: Cannas are tender perennials, so wait to plant them or set them outside until after the last spring frost. Cannas like lots of sun and well-drained, moist, fertile soil.
What do you do with canna bulbs in the fall?
In the fall, dig rhizomes after the leaves have yellowed, died back or have been killed by frost, but before the ground freezes. Leaving your cannas till after a freeze provides the longest possible growing season so the plant can store food for next year’s growth. Carefully dig your cannas with a shovel or spade. Cut all around the clump. Lift rhizome clumps out of the ground and shake off any excess soil. Rinse the rhizomes to remove dirt.
How to separate and plant canna bulbs?
For very large groups the rhizomes will fall apart when you dig them making that first division for you. If the smaller groups fit your landscape needs they can be replanted directly. Often larger groups require a knife to help break apart the rhizomes. The plants get rather large and the rhizomes take up a lot of soil room. Therefore, I strongly urge you to put them in extra-large pots, meaning 24″ and larger. If you want to create a combination planting, go bigger!
How do you split canna lily corms in the fall?
If your cannas are in the ground, you must lift them first. Use a garden fork to loosen the soil around the perimeter of the clump. Start about a foot away from the stems to avoid hitting the rhizomes. Gently pry the clump upward from several sides. The short answer is yes, you can safely cut the thin, stringy roots off your canna bulbs before you store them. In fact, many gardeners prefer to do this because it makes the storage process much cleaner and more organized.You may leave the 6-inch stalk stub on the roots during storage. I usually trim them back to a couple of inches to save on storage space. Storing cannas in packing material is not always used or necessary. Some gardeners place their cannas in a root cellar with just garden soil clinging to them.