I need help please!!!

[4herbs]

I dont know what is this,never encountered this kind of problems with my plants,i am growing lemon skunk and the church and i have a little problem with my church plants that worries me,on older leaves there are somekind of dryed round spots,i dont know what it can be because non of the new growth is affected and everything is green and healthy,only the first two pair of leaves are burning please help me because i dont want to lose my plants!

 

[Sleepy]

difficult to say without more specific info.

the newer growth looks good.

here are a few questions:

from stitch:
"
*NOTE: Please Cut And Paste only the section that applies and add your response. The more information you can give the better and faster people can help you out.Pictures should be added to every thread to ensure a proper diagnosis, when using pictures please ensure your HPS if using one is not turned on while taking pictures, as the lighting hides the plants problems. Fill out

ARE YOU USING?

SOIL:

How long has this problem been going on?
What STRAIN are you growing?
What was the establishing technique? (seed or clone?)
What is the age of your plants?
How long have they been in the soil mixture they are in now?
How Tall are the plants?
What PHASE (seedling, vegetative or flower) are the plants in?
What Technique are you using? (SOG, SCROG etc)
What size pots are you using? (Include how many subjects to pot)
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?)
What Nutrient's are you using?
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding?
If flowering, when did you switch over to using Bloom nutrients?
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?
When was your last feeding and how often are you feeding?
What size bulb are you using?
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 ?
Is the fan blowing directly at plants?
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?"

 

[4herbs]

the plants are grown from seeds,I m growing it with soil,you dont know the brand cause in my country there are different brand but it is one of the best quality soil,it has perlite i dont know the exact percentage but it is very fiberous and it has very good drainage,it has been added with vulcanic rocks specialy for plants the ph is 6,5 and it has been watered only few times with water that has 6,5 ph,they are around 4 weeks old,they are greenhouse the church and lemon skunk,they have been feed only once with half of dosage of N-p-k 13:4,5:6,5 and with all microelements,they have been sprayed once with homemade organic pesticide on a chilli pepers and garlic base and one teaspoon of antibacterial soap!the burnings are only on the first two pair of leaves and only on the church plants,size of the church pots are around 12 liters and lemon skunk 8 liters,i dont know what else to say but i dont think it is ph or anything,only thing it could be is that it burned due to that homemade pesticide but it started last week or maybe little earlier,i really dont know what should i do,the new growth is vigorous and very healthy!if you have an idea please share it with me...or maybe if I just cut of those infected leaves and see if it goes on any of the new growth?

 

[Sleepy]

"i really dont know what should i do,the new growth is vigorous and very healthy!if you have an idea please share it with me...or maybe if I just cut of those infected leaves and see if it goes on any of the new growth?"

i think they will be fine.

the new growth looks good.

see what happens.