Hi all,

Would like to get some advice.

I've started 3 x OG Kush auto May 7 2017. Outdoor.

Have sprung up nicely, however I noticed ( as with a previous outdoor grow) the oldest leaves ( bottom of plant) seem to be getting white spots and it seems gotten so bad that the bottome leaves looke 'burnt' and have crisped away.

What is happening?

Google research(!) and a visit to a garden centre I came away with a few things:
1. Some sort of pest/fungus : I have used onion/garlic puree to coat the leaves last couple of days.
2. Over/under nutrient (Nitrogen)?
3. Too much water ( has been wet spell for last couple of weeks)

Was thinking to go get some pesticide/fungicide?

Images below: please advise!
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