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Yellow and Brown leafs MicroGrow 250w CFL

Tripsick

Experienced?
Veteran
One of the plants has yellow and brown leaf's with dry burnt tips. I think this happened after the stalk was split at the main fork when i was adjusting a tie.
That has almost fully healed over. Maybe it was stress?
I have a 2nd plant and its doing fine with no signs of burning and they both use the same water and nutes.

All new growth at the bottom of the plant is very lush and green

SOIL:

How long has this problem been going on? Over a week
What STRAIN are you growing? Bag seed unknown
What was the establishing technique? (seed or clone?) Seed
What is the age of your plants? 6 weeks of 12/12 19 weeks total
How long have they been in the soil mixture they are in now? Yes and transplanted to larger pots 5 weeks ago.
How Tall are the plants? less than 30 inches
What PHASE (seedling, vegetative or flower) are the plants in? Flowering 6 th week of 12/12
What Technique are you using? (SOG, SCROG etc)
What size pots are you using? (Include how many subjects to pot) Perfect Pot
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) Fox Farms Ocean Forest
What Nutrient's are you using? Fox Farms Tiger bloom and Big bloom some molasses
How much of each nutrient are you using with how much water? 1 tsp = gal
How often are you feeding? every other week
If flowering, when did you switch over to using Bloom nutrients? 2 weeks into flowering i added 1 tsp of tiger bloom

What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM of your nutrients used?
What is the pH of the "RUN-OFF"? 6.8
What method of pH test was administered? Using Strips? pH pen? Strips
How often are you watering? When they are dry 3 inches down
When was your last feeding and how often are you feeding? Sunday
What size bulb are you using? 250w CFL
What is the distance to the canopy? 1 to 2 inches
What is your RH Factor? (Relative Humidity) 43%
What is the canopy temperature? 78F
What is the Day/Night Temp? (Include fluctuation range) 71-80
What is the current Air Flow? (cfm etc.) 178 CFM Votrex VT400
Tell us about your ventilation, intake exhaust and when its running and not running ? Passive intakes and pull exhaust through 4x12 carbon scrubber
Is the fan blowing directly at plants? no
Is the grow substrate constantly wet or moist? dry/moist
Is your water HARD or SOFT? Soft
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Tap that sits out for 72 hours
Are you using water from a water softener? No
Has plant been recently pruned, cloned or pinched? No
Have any pest chemicals been used? If so what and when? i seen 1 Gnat and killed it
Are plant's infected with pest's?
i dont think so




I have flushed with plain water and my run off is the same as the soil PH 6.8

Brown spots start in the center of the leaf then become yellow and dry
7-19--800---071.jpg




7-21-800---_02777.jpg




7-21-800---_006.jpg


7-19--800---023.jpg



:1help:
 

Tripsick

Experienced?
Veteran
its still just the one, the other is really green still. that one picture its the same plant... its just bushy.. ill get some pics under different light
.. after my batteries recharge.
 
M

mexilandrace

this late in flower it's not a good idea to dick around with nutes, just phed water from now on.
 

Tripsick

Experienced?
Veteran
yeah thats what im thinking...


I just went out and bought another PH test kit add 4 drops to a half vial of water.. it looks like the PH is High Ph 8.0 i shook the vial instead of tapping the side to mix it.. but i dont think that matters. i also used one of my test strips today and it shows a Ph of 7.6... this is pain tap water that has sat out for a few days and i was going to use tonight if they need it.

should i shoot for lower PH? I should have bought a digital Meter... i may go back to the store


The Vial test is reading 8.0 or higher.... im going to get some PH down and Some PH up and .... a Digital PH Meter... no more matching colors for me
 

Tripsick

Experienced?
Veteran
Yeah Ph of 8.1 - 8.4 from fresh sample.
I think we have a winner.

Talked with the local hydro guy in town and found out that our town uses 4 water sources and from Tap it will always very from 6.5 to 8.1 or there about.

The dropper test was way more accurate than the test strips.

So i have some PH down and im looking forward to healing my sick plant....
 

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