Nitrogen Def? Yellow leafs with pics

[Meaty]

How long has this problem been going on? Since flowering started
What STRAIN are you growing? bagseed
What was the establishing technique? (seed or clone?) seed
What is the age of your plants? 2.5 weeks flower/Roughly 7 weeks
How long have they been in the soil mixture they are in now? Since birth
How Tall are the plants?2.5 feet
What PHASE (seedling, vegetative or flower) are the plants in? flower
What Technique are you using? (SOG, SCROG etc)
What size pots are you using? (Include how many subjects to pot) 8 inch
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) Miracle Gro and Cow manure
What Nutrient's are you using? Miracle Gro bloom (15-30-15)
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding? Every other water
If flowering, when did you switch over to using Bloom nutrients? I started feeding when they showed preflowers
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"?
What method of pH test was administered? Using Strips? pH pen?
How often are you watering? Every 3rd day or so
When was your last feeding and how often are you feeding? Last feeding 3-4 days ago
What size bulb are you using? 400 watt
What is the distance to the canopy?
What is your RH Factor? (Relative Humidity)
What is the canopy temperature?
What is the Day/Night Temp? (Include fluctuation range)
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ? Good vent, lots and fans and fresh air
Is the fan blowing directly at plants? yes
Is the grow substrate constantly wet or moist?
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
Are you using water from a water softener?
Has plant been recently pruned, cloned or pinched?
Have any pest chemicals been used? If so what and when?
Are plant's infected with pest's?

Answered most questions. I think one problem might have been using a bloom formula the first couple weeks insted of regular. Is this a Nitrogen def? The leafs around the buds look nice and green but most of the fans are light green, yellow. Should I pick off the dead leafs or will that cause yellowing to spread? Any other advice is welcome. Thanks.

 

[10k]

Please give us a soil pH reading and also list the ingredients shown on your miracle grow fertilizer container. ? IE: does it contain any micro nutes, mg ?

The soil you list as "miracle grow and cow manure"
Please break that down for us. How much Miracle grow soil, what kind of miracle grow soil and how much cow crap, also how much perlite added for drainage and did you add anything else to the soil. ?

Really with cow manure mixed into your soil, there ought to be plenty of N in it already.
First impression is your pH is way out of whack locking out N and mg, missing micros, no mag & no dol lime or there's even more to the story.

What kind of 400w light ? MH, HPS or something else like Mercury vapor
What kind of water ?
What strength are you mixing that mg fert ?
When did the yellowing condition begin ?
Are the yellow leaves just falling off, do they fall off at the slightest touch or are they drying out after they yellow while on the plant ?

 

[Meaty]

I don't have a ph meter but shall get one this weekend. I added 1 tsp of dolomite lime to the soil when I planted her.

The ingredients in the fertilizer are - nitrogen 15% phosphate 30% soluble potash 15% boron, copper, iron, manganese, molybdenum, and zinc.

my light is a 400 watt hps, just using plain tap water, i am currently adding 1 tsp of fert per gallon of water, using every other watering. as for the leafs they just turn yellow and begin to curl up and die. its fairly easy to pick them off.

 

[bterzz]

Hey. If you do not know the PH of your water that is your biggest problem. Get some PH test drops as they're super cheap and all you need for soil.
Before you diagnose anything get your PH figured out.

good luck! nice plant!

 

[Mr. Stinky]

the drops are all ive ever used, and they work great. they have em at every walmart ive been in. they are in the fishtank section... thats def step 1 man

 

[MynameStitch]

Yes, that looks just like a nitrogen deficiency. I does not look like you have a pH issue, but we still need to know to make sure it's in the range...

Your plants look like they are lacking micronutrients...... what dosages are you using to feed them with?

Another thing, that pot size has got to be one of the problems, your plant is tall for the size of the plant, it's height wise could be caused by many factors, but when your plant is rootbound nutrients are not absorbed properly due to the roots being crowded, and growth can slow down or nearly stop altogether..

How far into flowering are you?
Are you using tap water? RO?
Because I also see magnesium problems too a little bit.... When you switch over to 12/12 plants get growth spurts and it sounds like to me the plant was rootbound before going into 12/12 and with the growth spurt hit it got way worse and now you see the problem it can cause.......

If your pH is in balance and your watering with enough food and have a set schdule and the issues does not stop, then you will need to put the plant into a new pot; it's not good to do so in flowering; but if you have tryed all the other options and no go, then the only way to fix it is to put it in a bigger pot.

If you do transplant it, I would go to a 2 gallon size pot to finish out, there roots grow the most in the first 2 weeks of flowering then taper off so 2 gallons will be enough if not, go to 3.

 

[Meaty]

Thanks for all the replies guys. I'm gonna pick up a pH meter later this morning and test the soil, my water, and the water with the added nutrients.

If the pH is the problem what are natural pH up/downs? I heard a little vinegar will lower the pH and I think baking soda will raise it. We shall see, thanks.