Help with yellowing/dying leaves

Kenny0003

New Member
Hey guys,
First time grower and I'm stumped as to what's going on with my girl.

Starting with the lower fan leaves yellowing and brown spots have been gradually spreading, tips are burnt as with nutrient burn but I flushed (3x water through potting mix) the plants last week. I then gave half strength bloom nutes. No change. It is now still getting worse and affecting areas closer to the buds. I have set up sticky traps in case it's fungus nats, no results yet. Can you tell me does this look like worsening nute burn (and now lockout) or does it look a definciency?

http://imgur.com/a/lYM9N

Using canna Flores nutes. NPKS 2-1-3-1
 
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