First Time Grow - Brown Tips

I have some really beautiful girls growing and they have done phenomenal up until this point. A few of the lower tips of the leaves have begun turning brown. I am a new grower and am a little terrified of killing them with nutes. So we have no given them any yet, just what was in the Fox Farm soil. I assume they are deficient! in something which is making their tips turn yellow and brown? I filled out a support ticket to show what nutes I have to use.


What is the strain and type:
AutoFlower White Wido

Indoor or Outdoor?

Size of space (max height and area, length/width)?
Closet, average size

Soil or Hydro? Type of Medium used? System type?
Soil, FoxFarm Potting Soil

pH? Of the soil or medium (root zone/reservoir/run-off) and of the water and/or nutrient mix that is fed to the plant?
PH of soil is 6
Ph of Water is 5

Type and strength of nutrients used?
NO NUTES yet. I have Fox Farm 6-4-4, Grow Big Liquid Concentrate Fertilizer and CalMg but have not given it yet.

Temperature? Day vs. night temp or highest and lowest temps? Root zone temps?
Around 80 degrees all the time.

Humidity %? Day vs. night

2000W LED Light kept 30" from top of plants

What are you using to test ph? Both of these numbers are low. Water ph is super acidic. What type of fox farms soil? Happy frog, ocean forest, etc

They look super dark like they have a nitrogen overdose

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See the resemblance

It is Ocean Forest Fox Farm soil.
We use this meter to test the PH of the water. We were having problems with our plants dying off so we started using PH down to lower the acid in the water. That seemed to help tremendously. No other nutes have been added besides this PH down.

How old are these plants? I see they’re flowering. How long they been in the ground

They have been in the ground for 11 weeks

She may have used up all the nutes in the ocean forest then. The pic may be misleading and the leaves look darker than they are. Could be a potassium deficiency. Do you know the ppm’s of the soil?

PH should be around 6.5 you maybe locking them out?


Do you test the soil PPM by measuring the runoff with your TDS meter? We havent done that yet.

Yes. That will let you know what your nutrient level is in the soil. Wondering if she ate through the original nutes in the soil. My ocean forest usually lasts 4-6 weeks without adding nutes. Once my ppm get below 1000, I start giving nutes

OK I will check the runoff and see where the nutes are at in the soil! Thank you

What does it start at?

Around 2300ppm

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Hmm thinking the soil I put together may be on the hot side lol

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Another soil I use is big rootz. It has microbes added and that starts around 3300. I think kind soil is close to 5000

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I also think that my pictures were taken in really bad lighting. They arent as dark as the one picture makes them seem.

Ah, yes. Much better. Didn’t make sense that there’d be a nitro toxicity if no nitro had been added

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