Of course it could be almost anything, Mary Ann, but it is symptomatic of
an elemental deficiency/ lack of availbility of Copper(Cu) in the soil.
bille
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http://216.239.53.104/search?q=cache:UJWBHbNHPoAJ:www.primalseeds.org/nutrie
nts.htm+soil+deficiencies+copper+muck+soil&hl=en&ie=UTF-8
"Copper :Young leaves become chloritc in a very strange way. Leaf centres
yellow while veins and leaf margins remain green for a while.
Shoots tips die, terminal leaves brown, leaves may fail to develop.
Muck or peat soils; too much lime or phosphate applied.
Excess phosphorus( read "Compost"), zinc or nitrogen
Important in photosynthesis. Catalyst in plant respiration and iron
utilization. "
dying.
> The last few leaves on some, not all, branches are turned brown, and the
> branch tip can be snapped off. I would say it was drying up, but this has
been one
