Black Spots on leaves after dealing with nute lockout from ph issues

[Pink]

Botanicare Coco

What STRAIN are you growing? Trainwreck arcata cut
What was the establishing technique? clone
What is the age of your plants? I am unsure, it was a gift
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? Late veg
What Technique are you using? Hand watering
What substrate/medium are you using?(Hydroton, RockWool etc.) Coco
What is the Nutrient temperature? Unsure
What Nutrient's are you using? PBP Calmag
What is the TDS/EC/PPM you are using? Not there yet....
What is the pH of the "Tank"? My ph is 5.8 to 6.1
Are you sure your calibration is correct on your equiptment? yes
When was your last watering? today
When was your last feeding change? ) I am doing a regime of feed feed then ph water...then repeat
What size bulb are you using? 400 hps for veg
What is the distance to the canopy? 18"
What is your RH Factor?
What is the canopy temperature? 72
What is the Day/Night Temp? (Include flucutaion range) 65
What is the current Air Flow? (cfm etc.) I have an 8" can fan.
Is the fan blowing directly at plants? I have fans blowing on the plants, yes.
Is your water HARD or SOFT? hard
Has plant been recently pruned, cloned off of or pinched no
Have any pest chemicals been used? If so, What and When? Florimite? was used on them before I got them.
Are plant's infected with pest's. They were exposed to spider mites, but have shown no signs of them yets.



Oook, here is the deal with this plant.

I got it from a friend that had no room for this monster. There were five in the batch she gave me. I got nute lockout on all five plants and have since corrected the problem. (Thank you TK and Nandro) They are out of town and I do not wanna call them on xmas, so I'm coming to you guys.

The trainwreck only is having this black spot problem. It looks a little like black spot that you get on roses. Here are pics. The first leaf is what the problem starts out like, then the second leaf is how it looks just before it dies!

Thank you for any help.

 

[MynameStitch]

How much nutrients are you using with how much water?
Were these plants always in coco?

If you have pH lockout normally the plant takes time to heal.
Was this plant always in coco?

Looks like it's a phosphorus issue....... PBP grow has very little phosphorus..... and depending on the amount you are using and add the fact you had pH problems; may be P deficiency......

 

[Pink]

How much nutrients are you using with how much water?
Were these plants always in coco?

If you have pH lockout normally the plant takes time to heal.
Was this plant always in coco?

Looks like it's a phosphorus issue....... PBP grow has very little phosphorus..... and depending on the amount you are using and add the fact you had pH problems; may be P deficiency......

Thanks for your response Stitch. I'm at 20 ml per gallon of pbp grow, and 10 mg of calmag. I been bringing the nutes up slowly after the flush. These plants were always in coco, but I'm real new at the coco thing. I was giving them 7-7.1 ph water and about killed them. I am unsure what my veg ppm should be using pbp and how fast to bring up the nutes after the ph issue??? I just got a new handy dandy ppm meter. look out! I'm dangerous

I had all kinds of micro nute deficiencies and identified most of them, but the black spots I was worried about. I'm not sure if they are new or if I didn't notice them earlier because they were so low on a huge bushy plant.

Thanks again for helpin me out.

 

[MynameStitch]

Damn dude you are burning the hell out of them, how big are these plants?

Unless your plants are 4 feet tall you can feed them that dose; but I would not use more than 5 ml per gallon of water of the pure blend depending on how big this plant is....... ; are you using tap water? If so you won't need the cal mag; tap water has plenty as long as your ppms comes out 100 or more; you should add all those nutrients to a gallon and use your TDS pen and give me the reading; watch how high it is.

Also test your PPMS for the tap water; what is the ppms right out of the tap?

Your doubling up on the cal mag by using that with hard water.

 

[Pink]

Actually they are about 4ft tall, The trainwreck is only about 3. They really arent burned. but the directions on the pbp call for 30 ml per gallon.

PPM read 230 with 20 ml pbp and 10 ml calmag.

In my soil garden I have to ad cal mag with my tap water, so I assumed I need it here too.

 

[Pink]

****ing Stoner alert. I'm a dork, and not reading it right. make that 1230! *where's the blush smiley*


Ok the straight tap ppm is 234 and with all those nutes was 1230. With only 5ml of the pbp was 637. That better?

 

[MynameStitch]

You never want to listen to the directions on the back of the bottles unless you are using GH, Advanced nutrients, and canna.

Ya, I know it calls for it; but if you used it; it would burn it

I would stop using the cal mag all together for right now and just use the pbp; would only use the cal mag when she starts wanting more magnesium.

Try 10 ml per gallon for right now; did not know they were 4 foot tall lol

You have some tip burn on the plant so you are just using the max amount where they don't like it so high. So cut it back down a bit and when they get a little bigger you can beef it back up to where you have it before.

Some plants that tall like 1200 ppms; but not all strains can even get that high of an amount......

Yours just does not like all of it that high and with your PPMS tap water being so hard it don't like with the added cal mag. So you don't need the calmag; your water is very very hard dude.....

If you continue to have problems and it spreads; you gotta get a filter system or get some bottled water; cause hard water even in soil will cause some problems with the nutrients being absorbed correctly....the high amounts of cal mag; you should not even had been using any cal mag supplements with how hard your water is.

I had this exact problem; too much calcium magneisum was locking out my phosphorus; but the water also contained sodium from the company using a water softner; if you look in my sick plants guide and scroll down to phoshorus you will see a single leaf pic with brown spots like yours.... my water even with the sodium was very hard; I am not sure what it was but the pH was high like around 9!!!! Extremely hard; the higher the PH the more akaline your water is and the more harder it is. So I bet my tap was around the same ppms yours is; have you ever checked the pH out of the tap too?

I honestly would think about using a different source of water soon; your plant seems to have a high tolerance though; just a buildup finally got to it....

 

[Pink]

Ok. Will back WAY off the nutes and omit the calmag and see what happens.


I been a Soil girl for a while now, and the learning curve on this coco is a bit steep. I haven't had to mess with ph for years, *hadda dig out the ole ph pen and solution and dust it off* My ph comes out of the tap at 7 or 7.1 and the nutes lowered it to 6ish. For soil that was fine, but the coco plants didnt like it at all, cause I was feeding *way too much* then flushing with 7.1. Lol, I guess I was doing everything I could to kill these poor girls.

I'll take your advice, and thanks so much for all your help. I'll post updates.

Merry Christmas!

 

[MynameStitch]

Make sure your pH run off comes out around 5.5 to 6.3... but the best range you want it to 5,5 to 5.8


Merry x-mas!