Mg Def, K def, P def, or pH problems?

I tried to do as much research as I could to figure this out myself, but once again I am coming back to RIU for some help.

In order to be as helpful as possible I will fill out this questionaire to the best of my ability then post another msg with what my assumptions are and any more info I can give.

SOIL:

How long has this problem been going on?
-Around 3-5 days
What STRAIN are you growing?
-Unknown clone from a friend (Rumored to be PK but I don't really believe him.)
What was the establishing technique? (seed or clone?)
- Cloned
What is the age of your plants?
-Clones taken about a month and a half ago.
How long have they been in the soil mixture they are in now?
-Close to 2 months (1 Month 2.5 Weeks roughly)
How Tall are the plants?
-They are about 45" tall although without training they would probably be close to 6.5'.
What PHASE (seedling, vegetative or flower) are the plants in?
-Flower (12/12 started 4 weeks ago, I'd say flowering for just about 2 weeks.)
What Technique are you using? (SOG, SCROG etc)
-Trying to start a perpetual harvest, have been training my initial plants that went into flower at 24" by tying them down. Idk if it'd be considered a true LST. I have also been bending them down away from the light usually carefully enough not to snap the stems but I have broken some on a few occasions.
What size pots are you using? (Include how many subjects to pot)
-1 plant per 3 gallon pot (I believe this may be an issue per how tall/big my plant has gotten.
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?)
-Promix-BX
75-85% Peat Moss
Vermiculite
Perlite (Added small amount of Perlite to original mix.)
Dolamitic & Calcitic Limestone
Myrocorise Pro
What Nutrient's are you using?
- Botanicare Pure Blend Pro Nutrient schedule.
How much of each nutrient are you using with how much water?
- Through Veg 15ml Grow and 5ml CalMag.
-Since 12/12 induced
15ml Bloom and 5ml of CalMag for first week
20ml Bloom and 5ml of CalMag for the next two weeks.
25ml Bloom and 5ml of Calmag for the last week.
How often are you feeding?
-Every day. Last 2-3 weeks a gallon of nuted water and a gallon of airated regular water between the 3.
If flowering, when did you switch over to using Bloom nutrients?
-4 Weeks ago but have been slowly increasing.
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
Unknown never paid attention to this.
What is the TDS/EC/PPM of your nutrients used?
Unknown no meter.
What is the pH of the "RUN-OFF"?
-Have not tested. I own a pH meter but I'm not quite sure how to do this.
What method of pH test was administered? Using Strips? pH pen?
I own an electronic pH meter.
How often are you watering?
-Every day
When was your last feeding and how often are you feeding?
-Today, every day.
What size bulb are you using?
-1k Watt /w AC hood
What is the distance to the canopy?
-6-8"
What is your RH Factor? (Relative Humidity)
~50% but does get higher at night with tent closed, have seen it go as high as 80%.
What is the canopy temperature?
-75 F with lights off 87-88 F lights on.
What is the Day/Night Temp? (Include fluctuation range)
^
What is the current Air Flow? (cfm etc.)
-None as far as ventilation. I do have a 50CFM bathroom fan available but I don't know how to install it.

I do have 3 oscilating fans in there though and the door is always open with the lights on.
Tell us about your ventilation, intake exhaust and when its running and not running ?
Is the fan blowing directly at plants?
-Yes
Is the grow substrate constantly wet or moist?
- Usually the entire time the light is on but when the next day comes the soil is pretty dry.
Is your water HARD or SOFT?
-Not totally sure, I know we have a water softener, but from what I have been told the specific faucet I get it from in my basement doesn't use softener salt or something.
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
-Tap
Are you using water from a water softener?
-Stated above, not sure..
Has plant been recently pruned, cloned or pinched?
-All plants are have clones taken from them the day they enter the flowering room and begin 12/12 light cycle.
Have any pest chemicals been used? If so what and when?
-None
Are plant's infected with pest's?
-I do believe I see a fair share of nats around and even some crawling on the surface of the soil. Not sure if they are fungus nats or what. I'll leave out some strips of tape to hopefully catch one and try to identify it.

Okay.. Now to get to my questions/problems..

1.) Growth has halted. I was thinking this was due to the stretch stopping as it fully enters the flowering stage, but it also seems to be the result of nute deficiencies/toxcicities.

2.) Mostly leaves in the lower canopy, but some at the tops of the branches have undergone a significant color change. I can't exactly tell how it changes, but from what I can tell it looks as if they start by getting a small amount of yellowing, then their stem begins to turn purple(and very weak). Then brown spots begin to occur on the leaves which by now are usually pretty yellow (around 85% of the leaf). The brown spots then begin to turn black. (I could be wrong it could go from black to brown.) After this the leaf appears to turn completely brown and dry. I also have leaves laying on the ground from my fans actually blowing them off.

3.) Very weak purple leaf stems. Yesterday I began really really noticing a lot of all these problems. I went to hold the leaf in a way to better look at it and it simply fell off my branch. I then went to check most of the necrotic foliage and, just as the first, nearly all of them fell right off with a small bit of movement or a slight tug.

4.) Abnormally curled and folded leaves appear on nearly every branch. They're folded/curved in half like a hotdog bun and also curl down quite a bit. I thought this was happening from parts of the plant not getting enough light, but it seems to be happening even in the canopy although it is semi-spirratic.

I did find some pictures on the internet that look close to the problems I'm having to give more of a visual aspect, but please keep in mind THESE ARE NOT THE PLANTS I'M TALKING ABOUT NOR ARE THEY MOST LIKELY THE SAME PLANT ANYWAY.


Leaves that are curled and brown at the end look like this. ^^



This is closest to what is happening on my plant. Notice the yellowing, folded leaves that curl down, and the brown/black spots.



The arrow on the right points out the part where I am saying they curl down at the tips of the leaves. Also the brown spots look similar however my spots happen more at the middle of my leaves, not just around the edges.

Now for my thoughts from my research:

1.) I believe almost completely that my pH is off. I believe this because my plants seem to be showing the lack of more than one nutrient. If I'm not mistaken, a fluctuation of pH would not allow different nutrients to be taken up at different times thus showing deficiencies of multiple nutrients.

I also have stated above that I have a pH meter, but I'm not completely sure how to use it for what I'm doing not to mention I know little about how to maintain it to keep it accurate.

2) MN deficiency.. The 2nd pic is closest to what I see happening in my plant which was taken from a guide describing MN deficiency or Manganese.

3)"Magnesium: Lower leaves turn yellow along the tips and margin and between the veins; the lower leaves wilt." <- (Sounds like my plant but some of these leaf problems are occuring in the canopy although pretty spirratic.)

4)Phosphorus or Potassium deficiency. Both seem to lead to weak stems and both are extremely vital to the flowering stage which I have just entered.

I ended up picking about 4 handfuls of leaves off my plants yesterday and I'm afraid to see what they look like today. Since yesterday they are only being fed water with a pH of 6.4-6.7 and will continue to be until I figure out what is wrong.

I imagine a flush would be in store which arises another question. I was given a trial jug of a product that is in the same line of nutrients as the one I'm using called Clearex. If indeed I do need to flush should this be used or is this for the final flushing of the plant?

I would like to thank all of you who even try to help. I know this is a very long post so I appreciate anyone that actually reads the majority of it. I am only trying to give you the neccessary info to make a diagnosis. Now please save my plants!!kiss-ass

BudJunky said:

Sorry I must get to my question later.. I'll edit this post with my actual problem/questions, however, I really must be going to bed. I just got back from a layoff and I really need to be chipper for work to keep my job so early to bed for me. See you all tomorrow.. I hope my girls will be okay until then.

Click to expand...

thease plants ,because they r in small buckets r totally dependant on what u feed them i wood flush that medium to start with about 10 gallons of plain water not tap water but rain , distilled or reverse osmosis 2 begin with 2 eliminate any other problems then after they dryout feed at full strength then 1/4 1/4 full 1/4 1/4 full and stop feeding alltogether 10 days prior 2 harvest ,good luck ..

Okay everybody start reading lol..

If anybody needs more info from me, an explanation, or some detail feel free to ask.

Please? Anybody? I also have noticed nats. I'm not sure if they are the fungal/fungus nats that are harmful but I am guessing they probably don't have a positive effect.

Ya started treating for fungas nats. Probably not the only thing I'm doing wrong.. Don't everyone give me advice at once now.

Where are the pics?

CdnBud said:

Where are the pics?

Click to expand...

Sorry that's the only thing I can't give ya as far as info. I know that's the easiest way to get help but I don't have a digital camera.

Considering you are using a soil mix heavy in peat moss which retains a lot of water perhaps you should stop watering every day. I think over watering may be your problem as far as leaf cupping and curling. Is the soil dry and the pot light when you water? Check out Uncle Ben's post about moisture stress, pretty informative and could help you I think.

Thanks.. I was pretty sure that was one of the problems as well. I'm sure it's not the only mistake I'm making tho.