[Arid_gardener] Question from Home-Hort WWW page

[Chris Trask]

    Sorry to have to say this, but it does sound like a case of too much
water.  Palo Verde and Palo Brea trees are sensitive to excessive water, and
root rot is often terminal.  However, you can try turning the water off
completely for a few months and see if it recovers.

    Blue Palo Verde is the more tolerant of water, and it is more often
found along desert washes along with Ironwood, Screwbean Mesquite, and
Netleaf Hackberry where there is ephemeral (seasonal) water and good
drainage, whereas Yellow (or Shortleaf) Palo Verde is more likely to be
found on slopes away from washes and in areas where there are clayish soils
that are less permeable to water.


Chris Trask
Outings Leader, Sierra Club (1981-1991)
Palo Verde Group Outings Chair, Sierra Club (1985-1988)
Grand Canyon Chapter Outings Chair, Sierra Club (1988-1991)
Member, Arizona Native Plant Society
Member, Arizona Governor's Advisory Council on Invasive Species (2005-2006)
Member, Central Arizona Weed Management Area

http://www.home.earthlink.net/~christrask/wildflowers.html

     We cannot command nature except by obeying her.

                                 - Sir Francis Bacon




----- Original Message -----
From: <jlwadsworth at yahoo.com>
To: <arid_gardener at Ag.arizona.edu>
Sent: Friday, November 02, 2007 1:48 PM
Subject: [Arid_gardener] Question from Home-Hort WWW page


> Jennifer
> 85007
> jlwadsworth at yahoo.com
>
> I have a mature palo brea tree in my front yard (probably 8-10 yrs old),
it's a great tree but this year I've noticed the following:
> --bark looks yellowish (as opposed to typical blue-green)
> --defoliated early (late Aug/Sept) and is still sparsely foliated
> --there are several spray sprinklers under the tree, one of which hit the
bark with the spray (it has since been turned off as have two others - too
much water)
> --there are med brown little raised bumps on some of the trunk and larger
branches that rub off if you touch them.
>
> I'm thinking the area the tree is in just got too much water (veggie
gardens surround it).  But I would love a second opinion.  I would hate to
lose this tree!
>
> Thank you!
>
>
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