North American Fruit Explorers mailing list at ibiblio

[Grover Barnett <scionmechanic@optonline.net>]

Wild Paw Paw take years to grow out a tap root then grow up through the 
canopy to mature trees.
Seedlings start out as an understory tree. Young trees need shade and 
will scald in direct sun.

Grover Barnett

On 6/20/2012 7:20 PM, Jay Cutts wrote:
> Does anyone have any ideas on why the leaves of a tree would become
> paler in the sun than they are in the shade?
>
> I have two small pawpaw's. One is under shade cloth and gets no direct
> sun. It has dark green leaves. The other is not covered and gets full
> sun about half the day. It has very pale leaves. I've seen this a number
> of times with pawpaws. In the shade the leaves are dark green. In the
> sun, they are pale.
>
> We're in New Mexico at about 5500 feet.
>
> For a while I was treating the pale plant as chlorotic (which is how it
> looks) and applying iron as a foliar spray and poured on the ground
> around the roots. This didn't help at all. Then I realized that there
> might be a different cause.
>
> Normally, I'd expect a plant in the shade to be paler than one in the sun.
>
> Any ideas?
>
> Regards,
>
> Jay
>
> Jay Cutts
> Director, Cutts Graduate Reviews
> Lead Author, Barron's MCAT Prep Book
> Lead Author, Barron's LSAT Prep Book (2013)
> (505) 281-0684
> 10 am to 10 pm Mountain Time, 7 days
>
>
>
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