help identify deficiency

[Nabzter]

Ok will try this .. Thanks

 

[Waira]

Nab'-- positively not Zn defc., that hit's the top most growth first, as it's an immobile nute element; the symptoms pattern isn't a match for Mg or Ca either, ditto for N defc.,... notable is the lack of spotting/dead patches, and the tip/edges- back progression of symptoms; sometimes nute burn can look like this, or atypical K defc. (rare)--- where on the plant is most affected, lower-mid-upper..? what are the N-P-K #'s, and dilution/frequency of feeding? A soil pH check would be wise, to make sure if you have a simple lack-of defc. issue, or an off-pH lockout issue,...