1. You plants are over watered and have been for a long time. Also looks like possible nutrient lockout.
A. What soil are you using? 50-50 ProMix, 4 parts ProMix: 1 part vermiculite
B. How often do you water? Have been watering about once every two-three day cycles (usually two).
I give the two bigger plants (in 20L smart pots) about 2.5L of water each, and the smaller plant in the plastic pot (7L) gets about 1-1.5L
C. When you water how much nutrients are you using. General Hydroponics is a good brand if used correct. I am following the GH Drain-To-Waste schedule.
D. How much water comes out of the bottom of the pot when you water if in dirt or pro mix.? It depends.. I water until I see enough run-off to cover the plastic plate the pot is in, but not enough for the bottom-end of the pot to be submerged more than a 1/4 inch.
E. What is the pH of the water of your run off? Haven't tested it in a while.. Was about mystified about usefulness of checking it, although maybe that info pertains more to checking pH of organic soil run-off..
2. Your plant is suffering from lack of light.
A. What type of light do you have. First 2-3 weeks of veg under 2 CFLs, then veg'd another month or so under 250W MH. Currently flowering under 600W HPS.
B. How many watts is the light or lights your using?
C. How far away from the plant are said lights? Because of their unknown/unstable/sativa-dominant genetics, and because of my application of different pruning techniques/no pruning, two plants are shorter and one is a giant tree... About 16" from the light at most, and I can't move the light any higher. Got 1.85m tall tent (6')
D. Can you move your light up and down to get as close to the plant as possible? To my knowledge, I shouldn't do that with such a powerful HPS.
3. They also look they have weak stems from the stretching.
A. Do you have a hole open on the bottom of your tent open with a light proof seal to allow cold air in. There is a duct that lets fresh air in. It's got a less than 90 degree bend, so to be honest I'm not sure if all the light is being blocked out. Also, there are pantyhose covering the ducts to filter out heavy pollution/bugs.
B. Do you have a hole on the top of your tent open to let hot air out obviously light proof. Yes, of course, equipped with an appropriate exhaust fan.
C. Are there any fans assisting your airflow of your tent. Yes, a 125mm exhaust and a 150mm (but less powerful in CFM) duct-fan that pushes air in. Also, I have one 20cm fan blowing air in a single direction above the canopy. I have to buy another one, because my 2nd one of those blew out.
D. Do you have any fans blowing in them to circulate stale air and strengthen them for the long haul.? I had a fan blowing directly on one of my plants, but it seemed to be doing harm to it (possible windburn in veg), compared to the other plants that didn't get the same direct wind.
E. Do you turn your plant so all top 18-24 inches is getting optimal light for there position. Well, I didn't move them much for pretty much all of veg, but then they had more room. I've found that now that they are stretching everywhere in flower that it's a lot more difficult to rotate them at all.
F. What type of reflectors or is it an open ended bulb? I use a 125mm cooltube reflector, with negative air pressure pulling air over the bulb.
4. Is your tent light tight?
It looks like it may have been confused about wanting to flower or not. My tent is a Secret Jardin DR90, and it came with a few tiny holes (very tiny), out of which light occasionally would shine, but I covered most/all of those up, but I also think that light shines out a lot easier than any light gets in, because the room the tent is in is never as illuminated and reflective as the inside of the tent itself.
A. When you got the tent did you stand inside with it all zipped up and all light off inside with the light in outside to make sure none entered the tent? No..
B. Did you put duct tape or some kind of light blocker over any part that zips that you don't use?
C. When you check for leaks make sure you sit in the tent for at least 30 mins. This gives your eyes time to adjust to the darkness and can see any leaks easily. Also after 30 mins put your hand 6 inches roughly from your face. If you can see it that is bad. If you can't that's perfect. As long as there is no lights from other sources getting in.
5. How long did you veg your plant for. I. E. How old is she? They are all 3-4 months old.. Closer to 4 months, but I don't know their exact ages.
A. From seed it will take longer. But even a rough guessing is ok. They are from seed, but like I said, bagseed and the weed they came from was of poor (but average, for my area) quality.
B. Your plant needs to be all the same height. You want your buds to all get light not just the top one or a side branch.
C. There are plenty of techniques for this just search the site or reply to me. I wish they were all the same height, but this being my first grow and all, I was, for the most part, reluctant about cutting too much off of them or anything...
Now I just think it's too late to do any more pruning.
6. What are your temperatures? Day-cycle temps are about 80 degrees Fahrenheit, and night-time is about 68-69 F.
A. Keeping them constant and within 10 degrees no matter if the light is on or not, they will not stretch as much and will save that energy until it buds. So technically it won't uptake nutrients until it needs them or it gets locked out from to many.
Well, friend, that just depends on whether we're talking degrees Celsius or Fahrenheit. Day and night temps are within 10 degrees of each other in terms of Celsius.
7. What is your humidity?
It's usually about 55% during day-cycle and as high as low-mid 70s (on a wet day) during the night-cycle. Have no idea what to do to bring humidity further down, as I unable to invest in more machinery at this point.
5. Try and keep it between 40 and 60 percent during veg. And 35 to 50 during flower. This all depends on air movement and strain you have to fine tune it. Perhaps when I get another 20cm circulation fan going again, I'll be able to keep humidity a little bit more under control.
8. At least your giving it a shot and your not giving up. Keep growing and asking questions on this site or any other good one you like. Everything here is my opinion. I'm not telling you to do any of it. Every grow is different. Every growers style varies. Just try and figure out something that works well for you and don't give up.
Thank you. I have found this to be one of the few constants about growing MJ: the very variations between grows and grow styles!
Save a few moments of stress throughout their lives, my plants have been healthful for the most part. If I get at least an ounce per plant (~3 Oz), I'll be content. I know that these "strains" I have are not grown for their quality, heavy bud production or anything. They are just straight up survivors of fucked up guerilla grows in the jungles of South America.
Next grow will be better. My good seeds are waiting to be properly grown.