calcium/magnesium deficiency?

TheDifferenceX

TheDifferenceX

Well-Known Member
Almost 5 weeks into flowering and my fan leaves started to show some rust spots 2 days ago. Have not used anything that supplements calcium/magnesium. Added 1tsp Epsom salt to my plain h2o watering yesterday. The leaves are a little worse today and it spread to a couple more fan leaves.

Is this a calcium/magnesium deficiency?

600watt LED, 3 gallon fabric pot, FFOF soil, bag seed, 32'' tall, 12'' away from light, using grow big/big bloom/tiger bloom nutes, 1 gallon water every 48 hours when pot is bone dry and light, temps 71-78, humidity 35-45%, ph of water 6.8, ph of run off 6.5.
 

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Yeah that looks like CalMag to me, I've seen it a couple of times now. Your pH and everything seems to be all good. Maybe another dose of epsom or another calmag supplement and see how that goes.
 
DazeHazy said:
Yeah that looks like CalMag to me, I've seen it a couple of times now. Your pH and everything seems to be all good. Maybe another dose of epsom or another calmag supplement and see how that goes.
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Thanks for the reply. It's been 10 years since I grew, everything was going well until this. I never used cal-mag years ago and never saw rust spots. I'll be using it tonight.
 
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