sick plants, yellowing leaves

[Yeti1]

I have 4 plants that are now 25 days into flowering, approx 55 days from sprouting. They are bagseeds (5/5 were girls, but one turned hermie ) They are in a 25x30x36 box. All in 6" pots, LST'd (although I started a little late in veg), currently under ~250 actual watts of CFLs, mixed spectrums. Soils is a mix of 6 parts MG Organic potting soil (no ferts), 2 parts perlite, 1 part manure and hummus. They get watered every 3 days with 1tsp Epsom salt, 1tsp molasses, 1/4tsp MG bloom booster (15-30-15) per gallon of water. They split about 4/5 of a gallon each watering. PH seems to be 6-7, but I have a Rapidtest tester, and I havent heard good things about them now. Canopy temps are usually 80-88* (Im going through many diff exhaust setups trying to get the temps down). Exhaust is currently a 6"duct booster and a 120mm computer fan. I've had no signs of pests so far.

I read up, and though I had a Mg def, so I flushed and used 1tsp Epsom salt per gallon of water, and nothing was solved. The lower fan leaves are turning yellow and almost falling off themselves. I've been leaving them on and testing their strength daily, and alot of them just fall off at the touch. I have what I think to be a few small nute burns, so I've cut back the bloom booster to its current 1/4 of the recomended amount. Does it look like I have PH problems that im not seeing with my lame meter?










A shot of the cab:




and my best budshot

 

[g13]

check out this link It's overgrows faq

http://www.drugs-forum.com/growfaq/GrowFAQ Basic Topics.htm

 

[Yeti1]

check out this link It's overgrows faq

http://www.drugs-forum.com/growfaq/GrowFAQ Basic Topics.htm

Got this on my favs. Its hard for me to tell the difference between all the deficiencies. I figure I'll learn with time, but they all kind of look like my plants to me.

 

[Yeti1]

Gotta update this. I let the leaves yellow and die off, hoping I could diagnose thier problem, and I havent been able to yet. One plant is now turning purple and brown and yellow. Bud has a dank, almost gross smell, and I dont know if this could be a mold or disease, or just the plants genetics.

I slowed down to only watering plants with 1tsp/gal of epsom salt, and the plants were flushed with a gallon of water each 5 days ago. I thought the color change of the leaves might be genetics, but they are starting to shrivel up and die now, so I think its sick. Plants are now on day 37 of flowering.

 

[Yeti1]

Would it be worth harvesting this plant at around 40 days if I cant fix this leaf problem? The smaller leaves in the buds are about to start browning off if this keeps up.

 

[wygram]

They're still very immature at 40 days, I would try to at least get to them to 50-55 days.

Fixing whatever is wrong is going to be nearly impossible... they do look slightly overwatered on top of those nutrient deficiencies... this does not mean feed them...

 

[stinkyattic]

MG organic is peat based and your runoff pH is worht testing. I'll bet you find it quite low.
The plants looked rootbound, and now look like soil chem is a disaster. Is the soil staying quite wet between waterings? I'd pot up to a slightly larger pot with plain boring promix and extra perlite to limp them through to harvest.
What you are seeing is primarily a nitrogen deficiency but it is being compounded by poor soil conditions. At this point in time, it's best jsut to fix the soil problem, get them as close to ripe as you can, and chalk this one up to experience.

 

[Yeti1]

Ive added lime to the soil, PH is checking in around 6.5 now. That was last week, so I assume the damage had already been done. I wont be using this cab or grow method after this harvest, so I'll check what I have around the house to put these things in before buying bigger pots. My new soil mix has been PH balanced around 6.6, so I'll add them to what I've got.

No kidding this has been an experience, thanks for the advice.