Calcium lockout due to PH issue or sun scald?

Ontario_Outlaw

Ontario_Outlaw

Member
Hey all, I am growing this plant in promix HP and have been using GH flora trio and the feed is PH’d to 5.9-6.0. I have been putting the plant outdoors on sunny days to harden it off and one day in particular had it in direct sun for a few extra hours as I had forgotten about it. I’m starting to see lower fan leaves with little rust spots which looks like calcium deficiency in some areas. This could also be sunburn as I’m seeing it only on the lower leaves and not the new growth. New growth looks nice and green.

Just thought I’d ask what any of you might think. Maybe a PH lockout and will try boosting it up to 6.4 or so and add some cal mag

Thanks!
 

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hotrodharley

hotrodharley

Well-Known Member
Ontario_Outlaw said:
Hey all, I am growing this plant in promix HP and have been using GH flora trio and the feed is PH’d to 5.9-6.0. I have been putting the plant outdoors on sunny days to harden it off and one day in particular had it in direct sun for a few extra hours as I had forgotten about it. I’m starting to see lower fan leaves with little rust spots which looks like calcium deficiency in some areas. This could also be sunburn as I’m seeing it only on the lower leaves and not the new growth. New growth looks nice and green.

Just thought I’d ask what any of you might think. Maybe a PH lockout and will try boosting it up to 6.4 or so and add some cal mag

Thanks!
Click to expand...
I see magnesium deficiency. Leaf shape. Add cal mag. You can foliar feed the magnesium. Epsom salts 1 tablespoon per gallon of water.
 
Ontario_Outlaw

Ontario_Outlaw

Member
Thanks for your help hotrodharley. That helps a lot! I see what you mean now after doing some more reading on magnesium deficiency specifically. I see some of the symptoms of it are a lighter green appearance and mottlling which is exactly what I’m seeing. Thanks again for your help as I can now concentrate on fixing it rather than figuring out what it is
 
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