I know that subject is probably making you go Huh? I know that because that
is what I'm thinking Huh?
Some of my trees have new leaves growing out red like Autumn but gaining is
size. And, new (red) leaves are still growing out after them and extending the
shoot. Earlier leaves just below
Often phosphorus deficiencies are induced by cold temperatures, which leads
to leaf color changes. There is interaction between genetics and environment
that leads to variable expression of these induced deficiencies. Rye, has
your season been cooler than normal in So Cal? Once warmer temperatures
Bill, yes it has been unusually cool and I have noticed this tendency seems to
coincide with colder weather. We had a hot spell, to which I relate the red
leaves in the first episode turning green upon reaching full size, between
these two cold spells. Also, this redding tendency seems
In addition to leaf analysis, I suggest you send soil samples as well.
Phosphorus binds to calcium and magnesium at high soil pH and to iron and
aluminum at low soil pH, tying up the phosphorus. Also, course soils (sandy
soils) have less phosphorus than fine soils. Mosbah , University of
