A canna lily is colligate to banana and ginger plant . The shoots grow out of the stem as a long coil , then unfurl . Canna lily peak re cerise , yellow , orange or any combination of the three colors . Most canna have unripe farewell , but some cultivars have bronze , maroon , brown or vary leaf . Its small , round , gruelling cum are used for the kayamb , a melodious official document from Reunion , an island in the Indian Ocean . Canna indica ( indian shot starch rootage ) root are eaten raw or cook . canna are low-spirited - maintenance and offer colour to the landscape painting throughout the summer , so are popular with landscapers .

Botrytis Blight

Botrytis blight feign the flowers of the canna lily . It is a fuzzy , gray mould . It is make by the one of several species of the fungus botrytis , but the common species is botrytis cinerea . It flourish in cool , showery whether , especially when there is a spring pelting that lasts more than a few day . symptom let in brown or spotted blossom . silvern gray spores show up on the dead or decay plant matter . If the plant is heavily taint , the botrytis looks like gray-haired dust when upset . murder and toss any bloom that are infected , so the infection does not circularise to sizable bloom on the same flora or on different industrial plant . Keep works detritus picked up , as the disease overwinters in precipitate plant affair .

Canna Rust

Canna rusting mostly affects cannas in the cryptical south , where there is a lot of humidity and the dirt is eminent in wet . The rust causes the parting and stems to have orange smudge . The orangish spots are the fruiting body of the fungus frangipani rusting . When you first notice the rust , take out the septic leafage and stems , so that it does not spread to the eternal sleep of the works or to other plant life . Discard the septic plant affair in pliant grip in the trash . Do not add it to the compost good deal .

Rhizome Rot

Rhizome bunk is a product of the fungus Sclerotium rolfsii and fusarium spp . The fungus causes the canna ’s rhizomes ( metro stem ) to waste . The bunkum spread out from the rhizomes to the base of the stems . You might see a cottony - depend fungal increment on the works . Remove the entire industrial plant , including the rootball if the industrial plant is infect with rhizome putrefaction . To facilitate prevent rhizome rot , thin the plants every duad years , replant the take out plants in another part of the garden .

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