Need help diagnosing a problem...

recently many of my plant are exhibiting symptoms i cant be sure of....

here are some pictures.. please take a look and let me know what you think...

as soon as possible please...

Nutrient burn.

some of these plants never even had any nutes...

plus this seems to be spreading to other plants... even the ones in flowering...

one more thing... this seems to affect only older leaves....

Im thinking Mn problem....

The soil may contain nutes...what you using?

And just what is a Mn problem?

Drainage looks non-existent. What medium are you torturing these in?

Mn is Manganese.... it kinda looks like it....

i dont think its the nute burn because its the same soil i always use.... it does contain time release fertilizer...

this doesnt explain how all the plants almost have the same problem even the ones without any fertilizer yet....

its peat moss mix with gravel and other crap it drains well.... not bad...

Well seems like you have all the answers so what's the prob?

what kid of experience do you have? Id start with the basics cause you got a problem. soil, ph, light distance, air circulation and water cyle last 3 watering. That will get a start. Very few people here are really going to be able to tell you the exact nut element problem you have which is a stab without knowing some details. Does sound like you have it down in thought but the result has more...

that medium looks like poop. are you a newbie? so am i. and i have been in this 3 years, come march. go to potting soil. water em in thoughly. then no more till the moisture meter says so. simplicity is the best way to avoid alot of problems. dont pay too much attention, to seasoned people, with all their nutes ans stuff. they have evolved, and learned thru time, what works and dosent. use half the nutes whatever u use say to use. keep the roots warm, meaning do not place directly on a cold floor. i use 2" thermal board. never foliar spray them, with lights on em. it hurts! also, when i transplant, i add at one tsp, per gallon, of epsom salts. this is magnesium. without it, the plant cant use anything! ph usually is not critical with soil. however, i adjust mine to 6.6-6.8. with 6.3-6.9 being max on either side. i find sometimes, too much attention, is not good. they like to be left alone..

blindbaby said:

! ph usually is not critical with soil. however, i adjust mine to 6.6-6.8. with 6.3-6.9 being max on either side. i find sometimes, too much attention, is not good. they like to be left alone..

Click to expand...

Agree with virtually all you wrote but left this. Easiest step to address starting now. But one needs to be able to test. Those little solution drop tests work great and are extremely accurate. Your solution sample in a test bottle - the described number of test solution drops into your sample and read the resulting color. Once you do it a few times you can eliminate the test knowing your starting pH and the number of drops or ML/CC of pH Down it requires to reach your desired end pH.

And I would not hesitate to adjust water to 6.0-6.1 to water or use for feeds. In medium other than DWC.

i have moderate experience id say,,, i have been growing for over a year..all diffrent kinds...
ph is around 7
air is 15 air changes per minute
temp is around 25-27c
im using metalhailide for veging 400 watts about 1 foot away 30 - 40 cm
for flowering im using hps 400w also same distance....

could it be a chlorine issue??

as i said not all the plants have been fertilized yet....

does it seem like a disease to anyone?

Id suggest having water sit in a bucket for min. 24hrs before using to eleminate any city clorine issues. from what you said ph is off and if its been that for a while you have found at least part of the issue. Did this plant ever have the bushy plant look or has it always been a snopy xmas tree clone.....soil 6.2-6.5. Let others guide you if its other.