Upper fan leaves with browning

M

Melternet

Active Member
I have been having an issue with my plants as they are showing brown spots all over some fan leaves. It is on the new growth, so upper part of the plant. I feed them about 8ml/gallon of nutrients as the recommended dosage from the nutrient's labels. I use tap water, but I de-chlorinate it. I think it might be a calcium deficiency possibly, but I can not narrow it down...
  • Growing indoor under (2) LED lights
  • I water whenever the medium gets to be dry
  • Growing in Coco Coir
  • Vegetative stage (5 weeks)
  • Temps ON(70-76 F) OFF(64-66 F)
  • RH 35% - 45%
  • PH 5.8->6.0
  • Remo Nutrients for nutrients and supplements
  • calmag solution called Magnifical by Remo Nutrients
Please let me know what you think this might be below, any help is appreciated! :)
 

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Last edited:
Have you checked the ph and TDs of your run off? Your correct you shouldn't have ca issues using tap water and adding ca/mg. It looks like ca to me though. Interval chlorosis, draw stringing.
 
Did they dry out real bad maby? When they wilt real bad when they come back it can leave some leaves looking deficient.
 
Dynamo626 said:
Have you checked the ph and TDs of your run off? Your correct you shouldn't have ca issues using tap water and adding ca/mg. It looks like ca to me though. Interval chlorosis, draw stringing.
Click to expand...

The run off PH was like 6 and after siting rose to 6.4
 
A lily dry droop isn't bad I mean when they wilt bad and come back. Guess you need another person's help lol dry. If it isn't ca I don't know.
 
Dynamo626 said:
A lily dry droop isn't bad I mean when they wilt bad and come back. Guess you need another person's help lol dry. If it isn't ca I don't know.
Click to expand...

I had looked at a ph chart for coco coir, it said calcium didnt get absorbed till around 6.2 PH and I was using 5.8 before, could have have been the issue?
 
Melternet said:
I had looked at a ph chart for coco coir, it said calcium didnt get absorbed till around 6.2 PH and I was using 5.8 before, could have have been the issue?
Click to expand...
No I ran 100% coco before 5.8 beginning to end. I run 50 50 coco ffof now and don't even worry about ph, if I did it should be 5.5 to 6.8 as soil should self buffer.
 
Dynamo626 said:
No I ran 100% coco before 5.8 beginning to end. I run 50 50 coco ffof now and don't even worry about ph, if I did it should be 5.5 to 6.8 as soil should self buffer.
Click to expand...

Should I only be feeding nutrients once weekly and if it needs more water just water it plain 6.0 ph water?
 
How often you feed depends on the gardener and the area. Some feed every third water some every other some every time. All have great results. When I managed the hydro store I advised starting every third and adapting from there. It's a lot easier to fix deficiencies than the problems that come with over feeding.
 
Dynamo626 said:
How often you feed depends on the gardener and the area. Some feed every third water some every other some every time. All have great results. When I managed the hydro store I advised starting every third and adapting from there. It's a lot easier to fix deficiencies than the problems that come with over feeding.
Click to expand...

Okay, good so its not that im over feeding.
 
Ca issue...double check the amounts you're feeding, how often, etc. The problem with 'calmag' solutions is that if you only need Ca, you're still adding Mg. Sometimes our plants only need one or the other and adding that which we don't need causes us issues. I would re-study my nutrients and reassure myself I'm giving the plants what they need as a whole, then, if I felt I was still short on Ca, I would add it by itself.

Note: If you're allowing the coco to dry out, you're hurting yourself and the plant. Also, don't use plain water, ever...in the type of grow you're attempting. Always use a feed solution, even if it's weak (ie 25%)...but never just plain water.
 
Also make sure you are mixing nuts in the proper order. Silica ( if you are using a silica sup) cal mag then base nutes then supplements last bennies
 
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