plants wilt at end of 18 hour cycle

experienced novice

Your Equipment:
.1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's)
9x600watt
.2) distance from tops
2-2.5 feet
.3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)
enclosed reflector
.4) Is there a consistent fresh air supply?
co2 and 3 ton ac
.5) Do you have an exhaust fan and a circulation fan?
circ fans
.6) What are the bulb wattages, kelvin ratings, and schedule?
600 watt 18 on 6 off

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...)
roots organic soil mix nothing added
.8) Size of container.45 gal. not quite full
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings?
ya
Your nutrients and water:
10) Source of water? (tap, bottled or filtered) What's it's ph before adjusting?
r.o. 6.9
11) Method of checking water ph. (ph pen, test strips, aquarium test kit...)
trimeter
12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...)ph down when needed
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule.
Advanced nutrients ab grow, calmag grow, rhinoskin,h2(quarter strength),f1,pirahna,sensizym, voodoo juice,carbo-load, house and garden-roots xcelerator
14) How often are you watering between feedings, and how much per watering?
every other day 2 gallons each,
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...)
16) Are your ph levels stable, or do they fluctuate?
mix nutrients when needed and hand water
17) What is your ingoing water's ph? ...your runoff ph?
18) Do you foliar feed? If so, with what, how often, and at what time do you spray?

Your growroom:
19) Indoors or outdoors?
20) What size of closet, room or hut?12x12
21) What are the temps and humidity levels while lights are on? ...With lights off?76 but can dial it to whateverwhen lights on, 70 when off,humidity fluctuates from 30 to 65% right now when lights on,60-65 at night(dehumidifier)
22) Have you seen signs of insects in the growroom?no insects

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?)indica
24) From seeds or clones?clone
25) Is this an autoflower strain?no
__________________

Ok so here's the deal,l have some plants transplanted about 2 weeks ago from 5 gal to 45 gal. I like to fill about 10x10 with 6 plants, they are a few weeks from being able to make a canopy. they looked great for a week but in the last week have an issue where when the lights turn on plants look great ,but throughout the course of the 18 hours they start to wilt and look like shit. all my info is above any suggestions?c02 at 1200 ppm and i have grown this strain with 1600 plus co2 and it loved it. Just flushed the last 2 waters and thinking of getting a humidifier to keep up humidity.also i think i may need to simplify the nutrients, i have always used Advanced full line in bloom it works great just need to get better at my late veg transition. Anyone got any advice? I want to flip in next week but would like them to be healthy when i do. thanks in advance.

I can only offer up a little grow fact. I know that within a hour or two before the darkness begins plants start to drop and sag preparing for there (sleep) cycle or down time. Now an hour before lights on ,they are up at attention as if they have morning wood. gearing up ready for the day. Dont really think it is a bad thing. Show you have a strict light cycle which the plants know very well. If they look healthy other wise. i wouldnt do anything drastic. a pic might help the better qualified ppl to help you.:thumbsup:

like bobjob4u said, it's not uncommon for your plants to sag when the lights go out.

why do you have your temp set to 76 while running co2?


-shake

I know that they sag whenlights go out but they are starting to wilt as soon as the lights turn on. by the end of the 18 hours they arent looking to hot. I have the temp on thermostat set at 76 because the way the a/c kicks on and off it fluctuates up 4 degrees when a/c shuts off then takes 5 minutes or so to get back down. My thermometer at canopy level reads 79 when thermostat says 76. When i set it to 83 degrees it fluctuates up to 86 or so and just feels really hot in there. I havent ruled outputting the temp up and dealing with the fluctuations. thanks a lot for your replys.

from everything i've read plants need higher temps to take advantage of co2. it's in debate but between 85-90F is what i've read.

what the problem occuring before the transplant or just after?


-shake

I agree with shake... I dont use co2 but everything ive read also states that to use co2 effectively the temps must be high.

yeah i have also read 83 to 86 i guess its just denial and error on my part ill raise the temps tonight and see if it helps. do any of you guys use advanced for veg?...Thx again for the replys guys.

Quote:

---

Originally Posted by bobjob4u

I can only offer up a little grow fact. I know that within a hour or two before the darkness begins plants start to drop and sag preparing for there (sleep) cycle or down time. Now an hour before lights on ,they are up at attention as if they have morning wood. gearing up ready for the day. Dont really think it is a bad thing. Show you have a strict light cycle which the plants know very well. If they look healthy other wise. i wouldnt do anything drastic. a pic might help the better qualified ppl to help you.:thumbsup:

---

WOW - I thought I had a pretty decent amount of knowledge. But, based upon the question I was asking & the answer I found (this one), I now.... once again.... remember how often we forget that we don't know a damned thing.
L

Quote:

---

Originally Posted by GetThisOrDie

I agree with shake... I dont use co2 but everything ive read also states that to use co2 effectively the temps must be high.

---

This one did the same thing to my head. Tried to PM ya, GT - sent a friend request instead.
L