Brown Spots on lower leaves

[Stev11x]

Hello I'm sure this has been asked before but I'm a week into flower and this morning noticed these brown or rust color spots real tiny its just on older lower fan leafs I do treat for pest and the product I use has fungicide in it as well so what do you all think any help would be appreciated!!

 

[Stev11x]

Other than that my plants are healthy and growing fast

 

[HydroKid239]

She has a calcium deficiency. Do you use calmag? She wants some.
Those leaves won’t be fixed, but the new growth should be fine after.

 

[Stev11x]

She has a calcium deficiency. Do you use calmag? She wants some.
Those leaves won’t be fixed, but the new growth should be fine after.

I have recently backed off the last two feeds and didn't give it any I will give it some thought thanks

 

[Stev11x]

I have recently backed off the last two feeds and didn't give it any I will give it some thought thanks

I ment i will give them some cal mag lol

 

[hotrodharley]

What medium are you growing in and what kind of water are you using? Meaning tap or RO or ?

 

[Bullet2112]

You should measure run off for PH and EC/PPM levels in your medium before just adding cal/mag.

You could more than likely have a salt buildup in your medium and adding more will make it worse.

Without knowing what's going on in the medium its just guessing really.

Good practice is to check run off periodically to make sure things are in check.

Usually the salt build-ups start showing symptoms around first weeks of flower in most cases.

If the ph is off in your medium it can starve your plants of certain elements like calcium and magnesium, and adding more will make the medium become toxic.

 

[Stev11x]

You should measure run off for PH and EC/PPM levels in your medium before just adding cal/mag.

You could more than likely have a salt buildup in your medium and adding more will make it worse.

Without knowing what's going on in the medium its just guessing really.

Good practice is to check run off periodically to make sure things are in check.

Usually the salt build-ups start showing symptoms around first weeks of flower in most cases.

If the ph is off in your medium it can starve your plants of certain elements like calcium and magnesium, and adding more will make the medium become toxic.

Sorry should have mentioned im running hydroponic bucket set up

 

[Bullet2112]

Ahhh, ok cool. Does it recirculate or DWC?? Still need to know Ph level and EC/PPM levels of the solution.

What is day time temps and humidity levels?

What type nutrients you use?

 

[Stev11x]

DWC
Ppm 560
PH 5.9
General Hydroponics Floral series
Orca premium for roots
Calmag
RH about 43%-47%
Temp day 73-75
Temp night about 68 degrees

 

[hotrodharley]

Sorry should have mentioned im running hydroponic bucket set up

Using RO or tap water?

 

[Stev11x]

Using RO or tap water?

RO

 

[hotrodharley]

DWC
Ppm 560
PH 5.9
General Hydroponics Floral series
Orca premium for roots
Calmag
RH about 43%-47%
Temp day 73-75
Temp night about 68 degrees

Are you going by GH feeding schedule? Your EC is fairly low.

 

[Stev11x]

I am running this schedule (see pic) it was higher 900's but I had some leaf holes earlier on and my guy at the hydroponics store is very knowledgeable and said i should cut back on cal mag so I did and that problem stopped but maybe I cut back to much

 

[Stev11x]

I'm in week 5

 

[Stev11x]

I swap out new nutrients every Sunday just a fyi

 

[hotrodharley]

I am running this schedule (see pic) it was higher 900's but I had some leaf holes earlier on and my guy at the hydroponics store is very knowledgeable and said i should cut back on cal mag so I did and that problem stopped but maybe I cut back to much

You want to include the cal mag in the proper ratio per the feeding schedule. Everything in the proper ratio including when you top off your rez. Especially with RO don’t cut the calcium.

 

[hotrodharley]

I swap out new nutrients every Sunday just a fyi

This week I would suggest an increase of 150 ppm. Using the ratios on the feed chart to achieve this.

 

[Stev11x]

You want to include the cal mag in the proper ratio per the feeding schedule. Everything in the proper ratio including when you top off your rez. Especially with RO don’t cut the calcium.

It helped in veg cause for some reason I was getting random holes in leaves not sure if that was causing it but the issue stopped but I guess it needs now more in flower thanks alot for your help

 

[hotrodharley]

I’ve never heard calcium caused holes. Deficiency you’re seeing. Toxicity causes lockout more than any other nutrient.

Edit: not saying it doesn’t cause holes. Just I’ve never heard it or experienced it.