Liriope Diseases

kathleen_mcclellanAugust 10, 2003

Does anyone else have a problem with their liriopes rotting at the base of the stems?

Last year during the drouth they looked great. This year they've had much more moisture-even though they're under the eaves of the house-and I've mulched them. I pulled back the mulch around the plant and removed all affected leaves, and kept the mulch away from the base, but they still look pretty puny.(The soil around them is well drained and not overly wet.) They are planted between azaleas which do need the mulch.

Any advice would be much appreciated!

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nandina(8b)

Do you cut your Liriope back in the early spring every year? That may solve your problem. What you describe sounds like you have not been doing this. Try scattering a handful of cornmeal (or ground corn) around each plant once a month. This should stop your problem.

    Bookmark   August 11, 2003 at 8:23AM
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idixierose(z8b Coastal SC)

In my garden liriopes do better in the dryer areas and in areas where the soil is not heavily enriched with organic matter.

What does putting cornmeal around the plants do?

    Bookmark   August 11, 2003 at 9:26AM
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kathleen_mcclellan

Thanks so much for the advice! I haven't tried cutting them back before.
What DOES cornmeal do?

    Bookmark   August 16, 2003 at 10:39PM
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nandina(8b)

In answer to your questions re cornmeal. Several years ago some of us here on GardenWeb noted that the U. of Georgia was suggesting that peanut farmers apply cornmeal/ground corn to their crops to control various fungus problems. So we began experimenting with cornmeal as an all purpose plant fungicide and our research continues. You will find many postings on the Lawn Forum and Garden Experiments Forum with our thoughts and trials on the subject. At this point it appears that a monthly application of cornmeal around any plant (or lawn) that suffers a yearly fungus/mildew problem may organically control the problem. Treatment should begin in the early spring. The good news is that I can say with certainty that monthly applications of cornmeal to lawns as a treatment for Southern Blight and Brown Patch works. That is why I suggested using it on Liriope.

    Bookmark   August 18, 2003 at 12:59PM
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kathleen_mcclellan

OK, I'll try it, but I'm presuming you don't mean Martha White self rising!
Do you know how the cornmeal works?
Thanks!

    Bookmark   August 18, 2003 at 6:57PM
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WannaBGardener(8b & 4a)

I tried the "corn meal" trick on our gardenia this spring, and the plant has not had the yellow leaves that it usually has had, and the black leaf mold (fungus?) has not been there either. Was it the corn meal??? Who knows, but in past years I have tried many other methods, up to and including rusty nails, with no luck. Our Lirope was hit by frost last winter, so we cut it back, and it is better then ever now. So I suggest you give yours a hair cut, and a side dressing of good old corn meal wouldn't hurt.

    Bookmark   August 19, 2003 at 9:33AM
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nandina(8b)

WannaBGardener,
Thank you! Thank you! This spring I did a post requesting that gardeners toss cornmeal under Gardenias once a month as I had noted (I'm doing a ton of cornmeal experiments) that it greatly reduced the yellowing leaf problem. You have confirmed my observations! I urge everyone to give this a try, beginning now and through the winter. We all hate those darn yellow leaves/sooty mold and it is possible that these monthly cornmeal applications really help the situation. I do not have a clue as to why it works....but....try it and report back next summer. Please!

Note: When using cornmeal around broadleaf evergreens you may note a spidery yellow fungus developing on the leaves. Don't panic. This will disappear on its own and is harmless.

    Bookmark   August 21, 2003 at 8:24PM
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pdrackett(8b MS)

I read a research report a little more than a year ago, I think from the University of Florida concerning an increase of problems with root & crown rot of Liriope, particularly of the Evergreen Giant. I asked a reputable nurseryman who faxed me the report (I'm in coastal Mississippi) about two years ago after seeing about twenty EG Liriope on a job site that turned yellow & rotted out, just seemed too weird, since the past few weeks I had also seen liriopes rotting out. I knew something was up - but most retail nurseries still say - "HUH?" And I have seen it off and on for the last year or so... apparently the disease isintroduced in the nurseries at the time of division of the pips, and under the stress of a lot of water, like over-irrigating... that is when the disease will surface. So the best advice is to keep the beds dry, don't run any more irrigation than absolutely necessary - and if you have some that are sick, get rid of the soil too. If you can find an article, you may find what to drench the soil with if your problem is extensive. Good luck! The wet weather this year hasn't helped this problem!!

    Bookmark   August 31, 2003 at 12:29AM
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georgia_belle(8b south GA)

I'm glad to see others with this problem. My lirope are Evergreen Giants and most people I know don't just mow them down like they do the little ones every year. I planted quite a few several years ago and have had trouble with all but one. My cats killed a vole (not supposed to be any of those around here according to the experts but I know one when I see one) so I even put volebloc around them thinking they were being eaten. I will see what happens with the cornmeal.. Guess it doesn't matter if it's yellow or white?

    Bookmark   October 12, 2003 at 6:08PM
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koplar(z5 NY)

I know that I am in a different climate, but lirope spicata is generally fine in our climate. I put lirope spicata in two gardens last year. One is on a sunnier site but clearly zone 5 with no trees around it. It has thrived. The other site is zone 6, shadier and some of the site is under norway spruce and boxwood. I had replaced the pacasandra with lirope and some of the pac. was also mysteriously dying out. The lirope did not do well at all last winter and I replaced a lot of it (total 3000 plants) this spring and it still isn't working. It is not as if all of it went bad but it definitely did not thrive in any area. I also replaced several inches of the soil when I planted last year. I am completely befuddled and would appreciate some feedback.

    Bookmark   November 15, 2003 at 9:23AM
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jsvrn(z10 FL SE)

I live in South Florida and suffer with yellow leaves and black ?fungus on my gardenias...do you think the corn meal will work here? thanks! Jackie

    Bookmark   November 30, 2003 at 9:44PM
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foofna(zone 6 NJ)

Do you think the cornmeal will work for black spot on roses? If so, how much cornmeal should I apply and how often? Any particular kind of cornmeal? Thanks!

    Bookmark   July 21, 2005 at 3:55PM
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Datawgal(8/9 SC)

Plain, not self rising.

    Bookmark   July 22, 2005 at 9:37PM
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floriss

Finally an answer to our dilemma! Planted 11 liriopes in a new garden and at least 5 have come down w/ rot. All other plants besides liriopes are doing fine. Have treated affected plants w/ a fungicide that can be used on organic gardens. Will try the cornmeal, too. Should affected plants be removed and if so, should the soil be treated in any special way ? Can I re-plant new liriopes in the same place ? Am new to all this and would appreciate ANY comments !!!!!

    Bookmark   June 4, 2006 at 8:39AM
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bcubed(6TN)

If you look on the web for the paper from U. of Fla, you will find it under "Liriope, Diseases of". I knew I had a problem in the spring, but didn't think much about it until it got out of hand. The cornmeal seems to be working for me. I just poured it on the crowns rhst were sffected, not so much on the unsffected crowns. Now my leaves are gettng green again, and are hard to pull out. So I am definitely a convert to cornmeal...except keeping the dog from eating it is s problem.

    Bookmark   July 19, 2006 at 9:15PM
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markm931-z_yahoo_com

Here is the link to the UofF article and follow up.
http://mrec.ifas.ufl.edu/jos/liriope.htm
http://mrec.ifas.ufl.edu/jos/GRO_MED.pdf

Here is a link that might be useful: UofF Link(s)

    Bookmark   September 29, 2008 at 12:12PM
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rudycell_earthlink_net

I have white spots/smudges on my liriope.
any suggestion on what it is or how to treat it?

Thank you

    Bookmark   June 3, 2011 at 6:21PM
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ALBASCOOBY_AOL_COM

AFTER APPLYING CORN MEAL DO I WATER IMMEDIATELY OR LEAVE DRY? THANKS

    Bookmark   July 6, 2011 at 12:21PM
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Chucha

Does anyone know which liriope varieties are least susceptible to crown rot from personal experience? I am in Austin, TX. Also, can anyone provide updates to the older posts on how the corn meal or sulphur is working for them on the crown rot, or any other remedies? I'm also having a problem with entomosporium leaf spot on dwarf hawthorns. Has anyone sucessfully dealt with that? I've made some bad choices on varieties lately!

    Bookmark   April 1, 2014 at 4:05PM
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Chucha

Does anyone know which liriope varieties are least susceptible to crown rot from personal experience? I am in Austin, TX. Also, can anyone provide updates to the older posts on how the corn meal or sulphur is working for them on the crown rot, or any other remedies? I'm also having a problem with entomosporium leaf spot on dwarf hawthorns. Has anyone sucessfully dealt with that? I've made some bad choices on varieties lately!

    Bookmark   April 1, 2014 at 4:09PM
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