Rust spots

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terpedup83

Well-Known Member
DonClaude420 said:
Is this a calmag deficiency?

Hlg135
7gallon fabric pot- peatmoss/perlite/organic potting mix
No added nutes yet.
80/72 temps
50% humidity
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looks like septoria fungus,i had septoria with my haze plant and it wrecked havoc, might want to spray plants down with something, it may be something else but cant hurt to spray them down as part of a maintenance , from then on out keep and eye out for leaves turning brown/yellow and falling off, good luck
 
HydroKid239

HydroKid239

Well-Known Member
I could be wrong, but given the light green all over what’s exposed to the light along with the spots.. I’d be more inclined to think it needs calmag. Only because I see both presumed symptoms together.

edit: I’d give it an overall feed with added calmag. I use city tap water at 7.6 ph / 145ppm. Your water source could be lacking minerals.
 
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DonClaude420

Member
HydroKid239 said:
I could be wrong, but given the light green all over what’s exposed to the light along with the spots.. I’d be more inclined to think it needs calmag. Only because I see both presumed symptoms together.

edit: I’d give it an overall feed with added calmag. I use city tap water at 7.6 ph / 145ppm. Your water source could be lacking minerals.
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This hlg light seems to be hard on the plants. I seem to have constant calmag issues under this light.

My city water ph is high. Close to 8 or 9
I'm not sure about ppm. Maybe I need to buy something to measure that.
Always adding ph down
 
HydroKid239

HydroKid239

Well-Known Member
DonClaude420 said:
This hlg light seems to be hard on the plants. I seem to have constant calmag issues under this light.

My city water ph is high. Close to 8 or 9
I'm not sure about ppm. Maybe I need to buy something to measure that.
Always adding ph down
Click to expand...
When you add nutrients to the water it will drop the ph naturally. Led seems to make the plants demand more magnesium, but from not giving any food I can see how the calcium in the medium would be spent after a while as well. So the plant has literally been taking a beating. You can turn the light down a bit to ease the stress.
 
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DonClaude420

Member
HydroKid239 said:
When you add nutrients to the water it will drop the ph naturally. Led seems to make the plants demand more magnesium, but from not giving any food I can see how the calcium in the medium would be spent after a while as well. So the plant has literally been taking a beating. You can turn the light down a bit to ease the stress.
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Ok great, thanks, that makes sense
I'm not sure how high I have the light up. Maybe 50-70% at 18 inches or so
I have been slowly bumping up intensity getting ready for the flip.
 
Budzbuddha

Budzbuddha

Well-Known Member
Looks like PH fluctuation - you stated your possible water ph and you are uncertain of ppm . Most municipal ( city water already has calcium / mag ) , and so does most nute lines. You also stated you wanted something to “ check “ it.

First , what organic potting mix are you are using?
It may or may not have ph buffering amendments.

If not, then it is up to you to narrow the ph of water going in ( ph / ppm pen ) to work with medium ( 6.5 + or - ) . Symptoms indicate the PH issue. Plus you have uptake issues - purpling / plant color.

I noticed you stated 80° temp - led grow like higher 80’s ( 85 or so ) ( which helps uptake ) cooler temps slows uptake and growth too.

If it was my plant i would increase ( light cycle on ) temperatures - narrow the ph to meet needs and feed accordingly.
 
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DonClaude420

Member
Feeding
Budzbuddha said:
Looks like PH fluctuation - you stated your possible water ph and you are uncertain of ppm . Most municipal ( city water already has calcium / mag ) , and so does most nute lines. You also stated you wanted something to “ check “ it.

First , what organic potting mix are you are using?
It may or may not have ph buffering amendments.

If not, then it is up to you to narrow the ph of water going in ( ph / ppm pen ) to work with medium ( 6.5 + or - ) . Symptoms indicate the PH issue. Plus you have uptake issues - purpling / plant color.

I noticed you stated 80° temp - led grow like higher 80’s ( 85 or so ) ( which helps uptake ) cooler temps slows uptake and growth too.

If it was my plant i would increase ( light cycle on ) temperatures - narrow the ph to meet needs and feed accordingly.
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Whitney farms at about 30% mix
Feeding always go in at 6.5 ph. / runoff is about the same coming out
Adding calmag usually clears this strain up.
The strain is purple. Finishes with purple flowers, not saying that isn't an issue
I will raise temps and see what difference that makes. I have always kept temps at 80 give or take a few.
I usually yield a solid 8 oz off this strain everytime.
 

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HydroKid239

HydroKid239

Well-Known Member
DonClaude420 said:
Thanks guys. I'll give her a good feeding soon!!
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Don’t forget about the temps. @Budzbuddha has a good point that I was just reminded of. My plants have slowed in growth since I removed the heat mat. I’m ordering smaller trays and lifters that will accommodate what’s staying in the tent for flower. Then I’ll add the heat mat in to sit under the trays. That should help my situation, as well as yours.
Much appreciated @Budzbuddha for adding your .02 :joint: :peace:
 
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