For months, I have been collecting by the garbage bagful, courtesy
of my local Starbucks, large plastic sacks of their used coffee
grounds for my garden.

It is my understanding that those used grounds block slugs from
slithering up the stems of my dahlias and lilies. In the Summer of
'08, I used smaller amounts sprinkled around tomatoes and
strawberries, but they seemed to taste a bit like coffee afterwards,
so I don't do that this year.

With my much greater quantities of grounds, which are only mildly
acidic, I figured the grounds would pour Nitrogen and organic matter
into the Soil and improve the tilth of my high clay Long Island dirt.

Last week, I stumbled on some research about Allelopathy. Coffee
beans are Allelopathic to among other things themselves. I am
wondering if they might be Allelopathic to the $100 worth of
Oriental Lilies I just purchased and planted in the newly dug
heavily amended bed I reserved just for them. Anyone out there who
can tell me not to worry about this?