Any idea of what deficiency this is?

Hello all, everything has been going well until??? I had 3 plants out of 12 doing this with a total of 6 leaves, all lower leaves 2 leaves each on the 3 plants. I’m not sure what’s going on? It is possible that it could be nute burn? But I’ve been careful since the first signs of issues. These are my first autos and I wanna catch this before it gets worse, they are a little over 3 weeks old since poping up from the dirt. I’m useing gh flora series once a week half strength. ro water cal mag and epson salt on watering days.

Thank you

1 Like

COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non applicable)

-What strain, Seed bank, or bag seed (photo or auto)
-Age of plant
-Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
-Vessels: Type and capacity of container (fabric, plastic, etc)
-PH and TDS of Water, Solution, runoff (if Applicable)
-PPM/TDS or EC of nutrient solution if applicable
-Method used to measure PH and TDS
-Indoor or Outdoor if indoor, size of grow space
-Light system List brand and wattage/spectrum
-Actual wattage draw of lights
-Current Light Schedule
-Temps; Day, Night
-Humidity; Day, Night
-Ventilation system; Yes, No, Size
-AC, Humidifier, De-humidifier,
-Co2; Yes, No

If growing Hydro some additional questions:

-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution

Always try to upload a clear picture in white light of any issues you may have to allow the community to assist you.


Also used Poof last week that was sprayed on

Ilgm grand daddy purple autos

2 hlg rspec 600’s set at proper dli

Soil- worm castings and dirt

Gh flora series

Ph always adjusted with ro water 6.2-6.8

Indoor temp is approximately 75 with 40-50 rh


When I add GH flora to my water it makes pH mid-6’s every time. I think I’ll stop checking it. No matter if half strength or full, it’s always 6.5 - 6.8.
Half strength until a month old now I’m at full which measures around 1300 - 1400ppm on my vivosun meter. And switched from ‘Grow’ to ‘Bloom’.
I was showing very different deficiency around 30 days, Ca I think. Not sure what yours is, just thought I’d share cuz I’m using same nutes, autoflower, 5gal.

1 Like

So add full strength? What fixed your issues? Thank you

Not sure if I fixed anything but I always had fading spotted leaves in flowering and mature plants. Now with full strength feeding I see it holds off for it seems a week. Which is gonna work for me 'cuz it seems im watering up to twice a week.
My plant with homemade plant food is holding green better than the GH one. Although in 10gal soil instead of 5-6gal.
In short yeah full strength GH and might still want the extra calcium.

1 Like

Any perlite to lighten it up? It must be a heavy dense mix.
Watering routine? Frequency and dry period?
Do you test runoff for ph & ppm. What are they?

Lower older leaves with gray/brown blotches often indicates phosphorous deficiency brought on by improper rootzone ph and or overwatering / general wet conditions.


That makes sense, I water every 2 days, probably to much, I’ll pick up some perlite to mix in.

Do you have one of these? They help a lot to make sure your plant does a complet wet to dry cycle. I always use mine as lots of times I cant lift my pots to check water weight depending on the training I’m using.

XLUX Soil Moisture Meter, Plant Water Monitor, Soil Hygrometer Sensor for Gardening, Farming, Indoor and Outdoor Plants, No Batteries Required

1 Like

Lol I do, but it always says it wet, I stick my finger in soil and it is almost always dry? But I bet I’m overwatering, I’ll hold back another day or 2

Should I disturb the soil to mix the perlite? Or just top?

1 Like

If that probe says its wet, it is. I dont water until its touching the red.
What size pots are you in?
As far as the perlite, I’m not sure how you would approach it at this point as I always mix mine in with 2cu/ yds of soil at a time.

1 Like

I can not imagine watering that often with soil that dense. Get used to lifting the pots. Depending on how deep down you push the meter, it is probably more accurate than your finger where it counts.


@beardless exactly. Thats why I asked what size pots those were. They look like at least 5gal if not bigger. A plant that size wouldnt need water for at least 5 days at that age.
I always stick that probe just about to the bottom. Only testing the upper few inches does nothing for you.

1 Like

I use 60/40 mix of coco and perlite in 5 gallon fabric / rain science bags and can go 2 days when that small.

1 Like

I’m useing 3 and 5 gallon Mesh bags.

I try to wait on watering longer, but it seams like they like it a few hrs after I water and look a little wilted after a day or so? But I’ll try letting them go for a couple more days, should be no problem

Added perlite, 4 bags of 8 dry quarts for 12 plants

1 Like