Leaf burn and discoloration!

The problem:

So I am having some issues with a couple plants. I am seeing discoloration spots on some of the plants...Some lighter and some darker. I posted pictures for you to see.

Also, one of the plants is showing signs of nute burn? The funny thing is that I am not using nutes right now. Maybe it is light burn from my T5 light?

Are these signs of lack or calcium and magnesium?

picture #1 and #2 are showing a plant that is discoloring...I have one other plants that is showing lighter coloring. I did not post a picture of this.

picture #3 is showing a plant that has leaf tips that are dead...and it is also showing discoloration.

The rest of the plants are not showing signs of anything...look very healthy and are growing nicely since I lowered my lights to stop the leggy issue I was facing with Citral ( i have been this is common for this strain in seedlings)

My System:

Growing drip system hydro
no nutes...still seedlings
5 gallon res.
16 pants with 3 showing signs of these problems.
t5 light with 4 bulbs (hot and cold mixture)
lighting schedule on 18/6

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Happy Growing :hippy:

-Martyr Projekt

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What is the source of your water? And its pH?

Good start on info for troubleshooting. There is a troubleshooting form shown as a sticky at the top of this forum. Copy and paste that form to this thread with answers. You will get more, and most likely better, responses by posting that info.

Good luck.

distilled water from the store. PH of water currently is about 5.5...

Do you have a problem with your tap water? No need to use distilled water for seedling (or any MJ) unless your tap water has issues (very hard or salty). Your seedlings will do quite well with the little bit of minerals most tap water contains.

In addition to lacking some essential trace minerals, I also recall reading that some distilled water can be heavy on the salts, but don't take that as gospel. My memory's not what it used to be :stoned:.

I know nothing about rockwool hydro. You're gonna need someone else.

Trust me... fill out the form.

Water in my area is super hard and calcifies very easily. I wouldn't grow with it...even if you paid me to. Let alone smoke all the run off and chemicals in our water supply.

I personally will only drink filtered water, or from reverse ozmosis.

If you go to my grow log...I answer all of the questions from the form entirely. Not to mention, I believe I answered all of the basic troubleshooting questions. The form is retarded...especially since I posted pictures.

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Happy Growing:hippy:

-Martyr Projekt

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What is your experience level? Been a part of tons of guerilla and backyard outdoor grows.

What type of hydro set-up are you running? Drip system to rockwohl cubes.

Your Equipment:
A) Type and wattage of lights. T5 four bulb...2 hot and 2 cool bulbs.
B) Distance from tops? I am about 3-4 inches from the tops
C) Reflector type? Reflector came on the light
D) What are the bulb wattages, kelvin ratings, and schedule? 18/6 light cycle...wattage is about 350 watts
E) Is there a consistent fresh air supply? yes...two oscilating fans...an exhaust fan.
F) Do you have an exhaust fan and a circulation fan? yes...already answered this redundant question
G) Size of reservoir? 5 gallon

Your nutrients and water:
H) Source of water. (tap or filtered) Ph of water is 5...distilled water from store.
I) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. one feed every day for 15 minutes, nutes being used are 3 part GH system. 1.5ml-1.5ml-1.5ml


J) What is the ec/ppm of your unadjusted tap (or filtered) water? no idea
K) What is the ec/ppm of your nutrient solution? no idea
L) What is the temperature of your nutrient solution? (reservoir high and low temps) temp at 74 degrees
M) Does your ec/ppm show a rise or fall when you do your daily PPM check? do not have a ppm checker.
N) Does the ph fluctuate? no...stable 5.8
O) Do you foliar feed? no
P) How often do you replace reservoir water/nutes? every week

Your growroom:
Q) What size of closet, room or hut? 4x6 veg room...in a larger 10x7 room
R) What are the temps and humidity levels while lights are on? ...With lights off? temps runs around 76 degrees while lights are on humidity is at 50-53%....Lights off is about 70-72 degrees 48-50% humidity
S) Have you seen signs of insects in the growroom? got rid of the gnat problem. Have not seen anything in days!
T) Are the roots long and white, or brown and slimy? white...and starting to come through the bottom of the rockwohl.

Your strain:
U) What strain are you growing? Citral
V) From seeds or clones? Seeds
W) Is this an autoflower strain? Yes

Quote:

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Originally Posted by martyrprojekt

Water in my area is super hard and calcifies very easily. I wouldn't grow with it...even if you paid me to. Let alone smoke all the run off and chemicals in our water supply.

I personally will only drink filtered water, or from reverse ozmosis.

If you go to my grow log...I answer all of the questions from the form entirely. Not to mention, I believe I answered all of the basic troubleshooting questions. The form is retarded...especially since I posted pictures.

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Happy Growing:hippy:

-Martyr Projekt

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(Bold blue by me)

The form helps answer basic questions that the forum troubleshooters need to know to help you diagnose and solve your problem. Unfortunately, pictures don't always tell the entire story.

Quote:

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Originally Posted by martyrprojekt

Also, one of the plants is showing signs of nute burn? The funny thing is that I am not using nutes right now.
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Quote:

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Originally Posted by martyrprojekt

Your nutrients and water:
H) Source of water. (tap or filtered) Ph of water is 5...distilled water from store.
I) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. one feed every day for 15 minutes, nutes being used are 3 part GH system. 1.5ml-1.5ml-1.5ml
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In initial post you said no nutes as they are babies. But you list nutes used and feed schedule in your form. Please clarify.

I can't help you anymore. As I said, I've no experience with rockwool hydro. Good luck to you.

Have you used this t5 set-up with these same bulbs in the past? Looks a bit like insufficient lighting and slight heat stress.
Has your flood schedule worked ok in the past? (not overwatering?)