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Re: Euonymus alatus


I have been following the saga of the non-reddening Euonymous alatus
with interest. Ours failed to redden last fall all over town
(Minneapolis, MN) as we did not get our usual cool down to first frost.
The night temps stayed high, usually near 40 until we did finally have a
frost in late October. There was no fall color to speak of in any
species. I suspect that the cooling is the trigger, much like daylength
in flowering plants, but I want to suggest another factor - nitrogen
fertilizer. We have worked with a number of customers over the years
whose burning bushes turn out not to burn because they have either been
directly fertilized with a high nitrogen lawn fertilizer ("I had it in
the garage.") or were planted in or to the runoff side of a highly
fertilized lawn. Lean conditions seem to suit this plant best, at least
as far as fall color is concerned. It isn't a heavy feeder in any case.
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