HELP! Plants all showing signs of the same nute deficiency

[good drown]

yea i would love too know that also, because its not true at all...

this is from the complete guide sticky
Magnesium gets locked out of soil growing at ph levels of 2.0-6.4
Magnesium is absorbed best in soil at a ph level of 6.5-9.1 .

 

[asstastic]

whats your temps that looks alot like cold roots if ya got a heat pad use it
if your temps are warm its mag or zink
mg soil is slow relese and could be causing probs
but like i said temps and if not temps then mag and if not that then its zink
and how to fix use your 20/20/20 fert at 1/4 strenth with phed water or RO

 

[peregrinus]

another vote for lowering the pH. I've seen that alone take care of many nutrient deficiencies.

 

[grapeman]

ya your ph is to high. Drop it to 5.5 to 6 that's what the new research is telliing us.

What research are you referring to?

Post it up please

 

[HossCartwright]

Have you checked your runoff? You can get a much better idea of what could be going wrong if you have the ph/ppm of your runoff.

I've never heard of anyone going below a ph of 6.3 in soil and I would advise against it. I'll bet if anything the inferior home depot all purpose plant fertilizer you have been using has built up in your medium and your PH is far too low. Check your runoff. Then go buy some cannabis specific nutrients like botanicare PBP for soil or similar from a grow store. IMO if you can buy it a at a hardware store you don't want to put it in your Cannabis plants.

 

[CyCloner]

Jorge Cervantes - Medical Marijuana Growers Bible

Jorge Cervantes - Medical Marijuana Growers Bible

Can you tell me the source of this research for soil grows? That number seems lower than I've seen for soil.

I picked up a copy of Jorge's latest book recently... and its packed with useful info. It states that the pH for indoor soil growing should be between 6.5 - 7.0. However, a chart is included on the same page showing all the nutes and the pH range for each. A pH of 6.5 appears to be the sweet spot for optimal uptake of all major & micro nutes.

Now I just gotta figure out how to get mine down from 7.0 - up... just started adding dolomite lime when i mix my soil up so maybe it will help to stabilize the pH at 7.0???

 

[CyCloner]

So you think Miracle Gro soil sucks too!

So you think Miracle Gro soil sucks too!

Have you checked your runoff? You can get a much better idea of what could be going wrong if you have the ph/ppm of your runoff.

I've never heard of anyone going below a ph of 6.3 in soil and I would advise against it. I'll bet if anything the inferior home depot all purpose plant fertilizer you have been using has built up in your medium and your PH is far too low. Check your runoff. Then go buy some cannabis specific nutrients like botanicare PBP for soil or similar from a grow store. IMO if you can buy it a at a hardware store you don't want to put it in your Cannabis plants.

Hoss, i been waiting for someone to make a comment on my choice of soil and just recently started to isolate it as a major contributer to my problemS! Miracle Gro soil is the 1 constant variable I've had over the past year or two. I never tested the soil straight out of the bag but started doing so recently and was left scratching my head when 2 different electonic pH meters are pegged all the way right on acidic, as low as 3.0 pH.

Dont think I wont be taking them up on their offer to refund your money if unsatisfied... hell, i should be compensated for all the damn headaches MG soil has caused me! All my plants complete their cycle and the results are often spectacular BUT none finish the cycle without some sort of nute def. showing up.

OH! Ironcially the runoff reads 7.0 going in and coming out but when i insert the leads and take an electronic reading of the soil itself after watering... it still pegs the needle FAR right (acidic). Beats the **** out of me man but i'm going crazy trying to get to the bottom of it. Probably best to just do like u said and start everything else out in new (REAL) gardening soil mix and a complete nute mix. Plan to order online, do you have a suggestion of a GREAT, COMPLETE fert.?

 

[CyCloner]

THANKS AGAIN!

THANKS AGAIN!

To all who responded and gave me some great feed back. Solution for me is going to be dropping the MG soil, get a more complete fert. designed just for my type of veggies (hehe) and continue to monitor my pH more closely.

Hopefully I will be able to post some pics of my healthy biatch's soon!

 

[Galaxy]

I have had this problem

 

[Mud Man]

bio nova n27.. ?
http://www.bionova.nl/SiteEN/En/pages/Detail3EN.asp?ID=296

i like this... always works well, quickly and efficiently for me

 

[hazy]

Wow.

how could anyone think this is a N problem. And be careful with the pH lockout numbers in that sticky.

A lot of peeps have it at least half right.

Would have been nice to have seen good shots of your own plants, but if that last pic is what they look like, that's an Fe def.
Almost always caused by high pH. By the time you hit 7.3 over half of available iron is gone and by 8.0 all of it is gone. I'd never have soil over 6.8. I'd run soil at 6.5-.
And yes a foliar feed is very good for iron defs.

 

[o.sparkles]

Thanks goodness this guy is researching instead of just doing what you people say!

There is some really bad and unsubstantiated information in this thread. This is not N def but the PH may be slightly high. Don't do anything drastic because they are looking great overall. You are on the right track, just keep researching and take very small steps when you decide what to change.

IT'S SOIL! WHY DIDN'T ANYONE EVEN ASK?

One thing not touched on yet is about the MG soil. Cy, you say that the mg is the one constant variable but I have found that MG changes their material sources so often that it's really not consistent at all. That may be part of your problem. Not saying it is or it isn't, just it could be.

You are doing great, keep it up.

 

[mysophilia]

Your adding Dolomite lime which will add Cal/Mg and keep your ph in optium range.. I would flush and do a light feeding of micros to get them back into shape...


http://mrec.ifas.ufl.edu/Foliage/Resrpts/rh_95_4.htm

I always like to find good data from agriculture schools so this might help with other questions

 

[Mud Man]

Wow.

how could anyone think this is a N problem. And be careful with the pH lockout numbers in that sticky.
.

i had a baby looking similar to the original pics page 1 in soil, fixed with a bit of N and foliar (N27)
sorry if I am noobing up the thread, bad info sucks!

1st pics looked like over watered & not enough N TO ME, but i stand corrected

 

[2Lazy]

It's an iron deficiency. Trust me here, anyone that says it's an N deficiency, or a pH issue, is wrong.

Look up the definition for an iron deficiency (the MJ grow FAQ was last updated 10 years ago and is wrong on a few things). New growth is yellow while old growth stays lush. Iron is important in the cell construction phase.

http://www.weedfarmer.com/cannabis/tables_guide.php

My suggestion to everyone with this issue is to use Botanicare's Cal-Mag+ in their solutions. I also suggest utilizing RO water (theres a machine in front of every grocery store, so no excuses). The Cal-Mag+ will supplement additional Nitrogen into the system as well, it is a 2-0-0. So in addition to resolving the iron issue you can also avoid future magnesium related issues and fulfill the increased nitrogen you'll need to green up that new growth. Get your pH in line of course, and foliar feeding is probably not necessary if your root system is healthy.

There is a possibility the problem could also be related to Zinc, but it's not as likely. More likely would be a binding up of Iron as a result of a Phosphorus imbalance. That would require a flushing and a replenishment of organics.

 

[darrmann]

I fertilize every 8-10 days with 50% recommended dose for indoor plants with either a peter's 20-20-20, shultz 10-15-10 or miracle gro 15-30-15. I change to a 10-52-10 during flowering stage and add SuperThrive to every other feeding, so every 3 weeks approximately. I add epson salt every 30 days @ a rate of 1 tablespoon per gallon of water.

dont drop the superthrive. its also a stress reducer.

 

[grapeman]

To all who responded and gave me some great feed back. Solution for me is going to be dropping the MG soil, get a more complete fert. designed just for my type of veggies (hehe) and continue to monitor my pH more closely.

Hopefully I will be able to post some pics of my healthy biatch's soon!

I think you should give a red to the thread "Organic for Beginners". The first post will guide you through mixing your own soils (and ferts if you choose to) and if you read a bit further, you will understand why you need to do the things you are not doing now.

Free soil lessons.

 

[CyCloner]

Wow, Grape (great) Thread!

Wow, Grape (great) Thread!

I think you should give a red to the thread "Organic for Beginners". The first post will guide you through mixing your own soils (and ferts if you choose to) and if you read a bit further, you will understand why you need to do the things you are not doing now.

Free soil lessons.

Man, you just put me on the exact information I've been looking for. At this point I dont even care what is causing my problems... I just want to find a way to mix my soil, drop a clone in a 5gal. bucket, water it and forget it till pickin time! Not to mention I have almost everything I need to start my organic soiless mix! Woot!!

 

[crissy]

my cam is crap. im getting yellowy patches with brown spots on my leaves the stem of the leaf is purple. is this a nute def.. if so what should i do. my ph is 6-7 in soil. canna proffesional plus soil. helppppppp. plz

 

[crissy]

my cam is crap. im getting yellowy patches with brown spots on my leaves the stem of the leaf is purple. is this a nute def.. if so what should i do. my ph is 6-7 in soil. canna proffesional plus soil. helppppppp. plz

also my tallest one is 71/4 inch. im using the growers guide what i have got "growell" i am giving them half litre ech of water with the recommended nutes. should i give them more water and up the nutes?