Are you asking about the problems shown on your pictures: Garden 05 and Garden 014 ?

The problem is boytris. Luckily it is not harmfull to the lilies, although the bulbs may not be able to recharge if the foliage does not stay on the plant long enough.

This is a problem in hot, humid weather and probably caused by the very dense planting you have (keeps humidity).

Try to water at night and from below (soaker hose for example). Do not water "from above" and you could try to dig and divide (dig and seperate) the lilies in fall to introduce more air between the plants.

It is hot harmfull but it can weaken bulbs overtime.. besides as you mention.. it is a bit of an eyesore of course.

If you want more information, send me an email.
Rgds
Kenneth

Kenneth, thank you for your response!
It has been terribly hot & humid here in the NorthEast.
82 right now on the shade side of the house.
The lilies that are not doing well are getting the PM sun and I'll bet that it is in the high to mid 90's.
Very unusual for my zone 4+ and we have had weeks of it!!
The plantings are dense, after years of nurturing and care, there isn;t room nor space for any weeds............
A year ago I fertilized with a product called Baa Baa Doo.
It comesin 50lb bags and is dehydrated sheep manure.
My gardens literally exploded into a jungle.
I've got humongus everything!!
thanks for your expertise, Kenneth.
If you lived around here then I'd say "Come help me thin this out!!!!"

Well.. atleast it stopped snowing, right ?? :-D

If you dig and divide, and spread the lilies around the yard, they should do much better next year. Even so, there will be years when no matter what, boytis just takes over.

So dividing would be best to take place in the Fall after the bulb has taken as much nourishment from the foliage as possible.(?)

Kenneth - when you say hot and humid, I am thinking hot and wet/rainy. Can botrytis rear its ugly head with hot, sometimes humid and very DRY weather?

cnid

CNID, if the lilies are stressed because of lack of water yes. Stressed lilies are more susceptible to boytris than healthy lilies, but just one night of prolonged leaf wetness is all it takes for boytris to spread

i was just about to post the same thing. all my lillies are doing the exact same thing it has been humid here. is there any type of spray that can be used to slow it down. my lillies have also become crowded over the years. jeff

Im not sure if I should even chime in as this is my very first year with lilies but it sure isnt my first year with hot/humid YUCK weather :) Anyway, I've been growing roses for years and we spray regularly for fungus. The lilies im sure get some over spray as they are scattered within the roses. Anyway, there is no sign of disease on any of my lilies.

Mari

You can try a baking soda warm water with a few drops of liquid soap spray. Will often work as well as the fungicides. I think it's Benomyl that chemical gardners use.