Whats causing my leafs to die? (pics)

[highsteve91]

Well I'll start off by saying hello to everyone. I've been a lurker around here for a few months now trying to learn everything that I can. I started a pc grow a few weeks ago and I now need some help identifying a problem.

Heres the rundown:

How long has this problem been going on?
noticed a few days ago.
What STRAIN are you growing?
Blue Widow
What was the establishing technique? (seed or clone?)
seed
What is the age of your plants?
24 days from seed
How long have they been in the soil mixture they are in now?
since seed
How Tall are the plants?
pics below
What PHASE (seedling, vegetative or flower) are the plants in?
flower
What size pots are you using? (Include how many subjects to pot)
cut down 32oz bottle
What substrate/medium are you using? What brand of soil mixture are you using (percentage of perlite, vermiculite...etc?)
Scotts Potting Soil with about 25% perlite mixed in.
What Nutrient's are you using?
none as of yet
How often are you watering?
about 2 times a week or about every 5 days
What size bulb are you using?
3x 26 watt 2700k cfls. running 12/12 from seed
What is the distance to the canopy?
pics below
What is your RH Factor? (Relative Humidity)
35-40%
What is the canopy temperature?
about 80F
What is the Day/Night Temp? (Include fluctuation range)
min- 62F max- 85F
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
bottled
Are you using water from a water softener?
no
Has plant been recently pruned, cloned or pinched?
no
Have any pest chemicals been used? If so what and when?
Are plant's infected with pest's?
no

On to the Pics.

Bottom two leaves:

The PC Setup:

 

[EvilTwin]

HS,
I'm not a micro-grower but I have to say that it looks fun.

You should cover the sides of your pots with duct tape or something. Light is bad for roots. Also...holes in the bottom of pots? Good drainage?

Is your water spring, distilled or drinking water?

Really it just looks like they need more N. Time for a feeding but start weak and build up.
ET

 

[severian]

Just the one leaf? Probably nothing wrong. Maybe hotspot or just dropping as you are essentially 2-3 weeks into flower and it looks like its the lowest on the trunk.

 

[!!!]

She/he didn't say they're 2 weeks into flowering. still veg.

 

[EvilTwin]

She/he didn't say they're 2 weeks into flowering. still veg.

Read the first post...they're 12/12 from seed.

 

[highsteve91]

You should cover the sides of your pots with duct tape or something. Light is bad for roots. Also...holes in the bottom of pots? Good drainage?

Is your water spring, distilled or drinking water?

Really it just looks like they need more N. Time for a feeding but start weak and build up.
ET

Thanks for the response. The pot does have holes for water drainage and I am using purified drinking water. With my next watering I will start the feeding.

She/he didn't say they're 2 weeks into flowering. still veg.

Sorry, I really didnt draw much attention to it in my first post, but since I started with a 12/12 light schedule from seed dosent that basically skip the vegetative process and force flowering?

EDIT: EvilTwin beat me to it.

 

[Guest 18340]

You need to feed that plant NOW! your plant is pulling nutrients (looks like Nitorgen) from it's bottom leaves. Those damaged leaves won't recover so you don't want too many to get affected.
Also, have you checked that bottled water? Whats the ph? Ppm? etc? You need to know those things. What nutrients do you plan on using?
Your post first says their in veg then you say 12/12 from seed, which is it?

 

[highsteve91]

sorry for being unclear. They are under 12/12 lights so they would be in flower. I'll feed them asap. This is my first grow so I am still learning as I go along. I'll have to check the stats of the water later today.

 

[jyme]

yea ill go with the nitrogen def since they was on a 12/12 seed flowering cycle there gunna pull all there nitregen from there leaves fast and yellowing and droping leafs will be farly progresive

 

[psycho pirate]

No veg time mean the plant didn't get hardly any time to absorb N. Give it a good blast of N. Try using a bloom fert with alot of N i it.