Plant job

Do your canna lilies have trouble this time of year , but you are n’t quite sure what to do ? Canna lily are hardy flowers , but they can be chivvy by some vernacular issues . In this article , gardening expert Paige Foley walks through the most common problem with canna lilies and how to prevent them .

Canna lily are noted for being pest and disease free . Well , for the most part ! Like all plants , they can and do develop problem in the right conditions . Canna lilieslovehot and humid climatesand these types of conditions are more susceptible to disease .

canna lily problems

You do n’t have to dwell in live and humid regions to experience problem with canna lilies . moth-eaten regions have their own problem as well . Your region is start to have an impact on the types of issue you run across . Disease or blighter might be present in one region but not another .

But do n’t fear ! Most of the problem canna lily experience are preventable . If they ’ve already taken place , most have a result . In this clause , we will dig deeper into some commonproblems seen with canna liliesand direction to fix them .

Contents

Several plant seedlings growing in small black containers. They are at a bright nursery setting and each plant has long green leaves.

Rhizomes That Don’t Germinate

You eventually found your canna lilies and it ’s been weeks andnothing has sprout . This can be discouraging but here are some things to consider .

When plant the rhizomes , you may have planted drained bulbs . Before you get down plant look for thick-skulled , wakeless rootstock with 2 to 5 eyes each . If your rhizome appear fragile and schmaltzy the probability are it ’s not viable .

Each rhizome you plant should have middle . During the dividing process , some rhizomes sections might not have eye . Remember , eye are the orbit where shoot will emerge so we wantplenty of eyes on the rhizome .

Close up of long green tropical leaves with single orange flower. The flower has long petals and one leaf that is broken, yellowing, and a little brown. In the background, you can see sunlight streaming in.

Another factor to consider is soil temperature . If you institute your rhizomes too early there is a chance of freezing . You will require to wait till soil temperatures are above 50ºF to plant . This will help foreclose the rhizomes from turning to mush under the dirt aerofoil .

pee is also another factor in how well rhizomes will develop . You shouldwater your them dailyuntil they start to emerge . This will help hydrate the rhizome and advance right growth . Once they emerge you could water less often .

Yellowing Leaves

Your canna lilies leaves are sprain yellow-bellied and now you ’re wondering what could be the trouble ? yellow foliage are ordinarily your first seeable sign that something is haywire . Identifying why they are turning yellow can be a little more difficult . You will have to do a petty detective piece of work to square off the case .

Common causes could beover or underwatering , not enough sunlight , or pests and diseases . Watering and sunlight are the usual culprit of yellow leaves . Rhizome rot will move around the folio chickenhearted and then the leave will cash in one’s chips rather rapidly .

Overcrowding

It ’s mid - summer and you have n’t seen a single bloom but there is plenty of foliage , what ’s the trouble ? Canna lilies spread rapidly and if they do n’t have enough quad they can become overcrowded . Leave anywhere from12 inches or more of spacebetween each rhizome to allow for spreading .

Overcrowding will kill new shoot and preclude uninterrupted blooms . As they spread , their canopy will get down to close in and less sunlight can reach the land surface . Those new shoot need sunlight to get . If the canopy is too dense , the unexampled shoots wo n’t have enough sunlight to continue growing .

If you believe your plants are too crowded , there are root . You canremove foliage that is finish bloomingtoallow sunshine for raw outgrowth . Also , you may grind up a few rootstalk to keep them from spreading more .

An abundance of pink flowers growing on tall stems outdoors. There is lush green foliage crowding the base of each plant at the bottom.

Rhizome or Root Rot

Rhizome rot , or also known as root rot , occurs in poorly draining soils that have too much rainfall or water supply . A fungus live asSclerotium rolfsiiandfusarium sppis what get the rootstalk to rot . The fungus spreads from the radix of the industrial plant up the theme and is cottony in visual aspect .

If you comment rootstalk rot , remove the infested plant and the origin mass . To forestall rootstock rotting in the future , thin your canna lily every few years . implant them in a new location after lifting will help forbid fungous increase .

Rust

One of the most vulgar diseases you ’ll find on canna lily is rust fungus . Therust produces sporesthat move through the air or by water . The rust is powdery and red - brown in color . This disease is produced when conditions are humid and water system is present on the foliage for a recollective period of time of time .

Rust spreads quickly and is unvoiced to control once it gets going . There are a few ways to take out rust from septic plants . Remove all infested leaves , halt , or even whole plants . By removing industrial plant parts or whole plants , you may palliate the spread of the disease .

Botrytis Blight

This special blight affects the flower of canna lilies . It will appear as a fuzzy , gray mould . Botrytis blight thrives in cold , rainy weather and is ordinarily see during the fountain months .

If you want to verify the spread of the blight , polish off any infested flowers from the root word . Be certain to place the discarded flush away from your garden and do not compost them . Blight can spread well and overwinter on other plant material .

Canna Yellow Mottle Virus

Canna yellow mottle viruscauses streak of pallid tissue paper which can be catch between the foliage veins . As the computer virus come on thetissue will turn brown and die . This virus can cause acrobatics , poor maturation , or destruction of the plant .

There are n’t many methods of control for virus in industrial plant . Controlling aphids will help limit the spread of the virus . If you are having problems with viruses , do not propagate from these plants . The virus will carry over from class to twelvemonth and most belike get worse .

Leaf Rollers

The leafroller is the caterpillar stage of the Brazilian sea captain . They jaw straight rows of holes in the leaf by rolling them up and eat them from the inner out . The caterpillar will be dark immature with a snowy stripe on each side of its back .

An infestedcanna lily will be shreddedand new leaf will not open up . If there is broad damage , the folio will pass away . These pests winter in dead leaf , so it is comfortably toremove all dead foliageat the end of the season to avoid a summer infestation .

Aphids

The dreaded aphid . We have all had experiences with aphids at some head while garden . Aphids are n’t picky and will infect any gullible , healthy plant brainstorm .

They constantly give rise new growth , which is idealistic for aphids . They latch onto novel growth andsuck the juice from the foliage tissue . Catching aphid before they get out of hand is important . you’re able to also present predatory insects to control them , such as ladybugs . Aphids are fuck to transmit virus from flora to embed .

Japanese Beetle

These special beetles feed between the veins of the canna lily leaves . Japanese mallet like to veil on theunderside of the leave-taking . If you see any beetles remove them from the leaf . This is gentle to do if you catch them early on .

If you have a enceinte infestation of Japanese beetle , you’re able to spray a diluted dish aerial scoop and body of water resolution on the plants . There are also a fewother good strategiesto get rid of them as well .

Snails

Another plague that can cause harm to canna lily leave is snails . They will deflate yap in the leaves and flowers while leaving a slimy track .

If you’re able to catch these little guys you canremove them by paw . They run to be most active during Nox hours , so this may be difficult to do . They can be prevent by keeping the garden free of debris . Consult your local greenhouse on other method of control snails if they are a problem .

Overwatering

You might be thinking , since canna lilies are tropical plants , they ask lots of H2O . Well , this is n’t necessarily dead on target . Even though they want steady watering , they should n’t be in waterlogged soil . This encourages root rot and will ultimately kill your plants .

Canna lily like well - draining soils . If you notice pooling water around the root days after watering , this is a sign your ground is n’t draining well . This just mean you should n’t water them as often . Give the soil time to drain the excess water . Once that water is go , check up on the soil and see if you should water it again or not .

Underwatering

We all draw a blank to water our works every now and then right ? I bed I do ! But underwatering can really be a heavy problem . They wo n’t grow slow , lavish foliage , and vivacious blooms as quickly .

If you notice that yourcanna lilies have started to buck and rip , this is a signboard they need more piddle . fortuitously , the tearing and ripping do n’t stymie their ontogeny to the point in time that you remark . It ’s the flora ’s path of telling you it ’s thirsty .

Always check the land around the base of the plant . This will help oneself you find out if they need to be watered or not . The grime should always be moist , but not waterlogged . If you are having a difficult time keeping your soil moisture high up , consider adding mulch which will help oneself hold wet .

Plants with tall stems and long leaves. Growing on the stems are bright pink flowers growing at the top with yellowing and brown tipped leaves toward the bottom of the plants. This is indicative of some sort of water logging or plant rot.

Blackened Foliage

If you start to notice blackening foliage , this is typically a sign that your realm has had frost . This unremarkably happens during the fall but can go on earlier count on the weather . Once your canna liliesfoliage turns pitch-black , they are done for the time of year .

Improper Overwintering

Canna Liliescan be treat as perennialsin ardent climates . But if you last in USDA zones 3 - 7 , you will have tooverwinter canna lily . This process is pretty simple , but if not done right , it can vote out the flora .

If you do n’t hive away them correctly , they can freeze or sprout overwinter . Choosing the right positioning to stack away them is crucial . They need a drab , coolheaded emplacement that wo n’t fall below 32 F. Common location are a garage , cellar , or unfinished basement .

If your depot locating is too warm , the rootstock can sprout and cause them to rot . on a regular basis check them during the winter to ensure they have n’t started to originate . If you notice them starting to sprout , do n’t panic . Move them to a different location that has cooler temperature and less easy .

Close up of large dark green leaf with spots that are yellow with rust colored centers. There are more damaged leaves blurred in the background.

Final Thoughts

Canna lilies are generally low - maintenance plant but problems can arise in the right conditions . If you meet problems , hopefully , you catch them shortly enough toeliminate the perpetrator and mitigate the impairment . Prevention is central to avoiding most of these problem , so water them appropriately , consistently match for pests , and employ healthy soil .

Close up of vividly colored, bright red flowers with blackening petals grown from lush green foliage. The foliage has yellow and brown tips.

Close up of a green leaf with yellowing streaks in dappled sunlight. The leaf is variegated with light and dark green coloring.

Close up of rolled up green leaf with torn leaf next to it. In the background, you can see blades of green grass that are out of focus.

Close up of several tiny green aphids crawling along the stem of a plant. There are also a few ants crawling on the same stem with out of focus green stems in background.

Close up of red and yellow flower that is torn and brown. Noticeable are Japanese beetles eating the petals and some of the petals have started to decay.

Close up of snail with large spiral shell resting on a pink flower petal. There are water droplets on the petal around the snail. The background is pink, and out of focus.

Beautiful pink tropical flower with lush green foliage being sprayed by water sprinkler system. This takes place in a garden with pink and yellow canna lily flowers.

Single orange and yellow flower growing from a plant with long green leaves that are ripping, yellowing, and browning at the edges. It sits among vining plants and dry soil on a sunny day.

Long tropical leaves that have been damaged by frost so they are browning, blackening, and falling over. The image orientation is looking up, and you can see green foliage against a blue sky.

Tropical plants with lush green foliage that are planted in a garden with soil. The flower heads have browned and are spent after dying off in the winter.