Colin,
I agree with Kevin here, it certainly sounds like too much water. And
natural soil is a big mistake. The only quick solution is much more
drainage, and if that doesn't work a repot will have to be done . . . which
will be much harder on the tree than drilling a bunch of holes in it's
current container. If you wind up repotting, I'd suggest straight coarse
builders sand.

Good luck,
Shelly Hurd Central CA - Sunset Zone 8-USDA Zone 9


"Colin Horn" wrote:

A member from my club collected a Kellog Oak in January, and gave it to me
in early march. It is in a 5 gallon bucket with its natural soil. It has
been doin great. Leaves have been booming (its a diciduous tree), and new
shoots have been showing. Several days ago however, I noticed many leaves
are turning yellow, and brown at the tips. It has been very warm the past
week, and I ussually keep it in the full sun. I moved it into a more shady
area when I noticed the problem, but it is getting worse. Any thoughts
what
it could be, or how I could treat it? Thanks so much. - Colin Horn
Orinda,
CA