Re: curling leaves on Japanese maple

Hi Barbara,

Two things about Japanese maples (Acer palmatum):

1) They are very susceptible to salt burn so I would
advise testing the gray water you are using before
continueing its use on the Maple. Salt burn symptoms
are brown, dried leaf margins and lack of vigor in
general.

2) They often show sun/wind burn in the first summer
after planting in my experience in the Bay Area.
Sometimes every summer for the first few years. You
might try an anti-transpirant (Cloud Cover is one
brand)applied next spring after the leaves have opened
but before warm weather. Ultimately they do fine
unless there is alot of wind and sun.

Best regards,

Deborah Lindsay
Oakland,Calif.
USDA 9-ish, Sunset 17-ish

--- Barbara Sargent <rsgt@california.com> wrote:
> The city of Berkeley has planted a Japanese maple in
> our
> parking strip. They can't tell me the exact variety
> but
> it's upright and grows to 15 to 20 feet they say.
> 
> We've been watering it mostly with gray water
> although we
> started with regular water; we give it around 20
> gallons a
> week which is what they suggested.
> 
> There are plenty of new leaves which are all curly
> and the
> older new leaves have lots of sunburn which may be
> from our
> not watering it enough at first.
> 
> Could this curly leaf be a result of using gray
> water,
> mostly from dish washing with very little liquid
> detergent?
> 
> I suspect that all of you are more knowledgeable
> than the
> city tree people since one of them thought the
> problem was
> aphids (there's no sign of aphids).
> 
> Thanks--
> 
> Barbara  - in Berkeley
> 


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