what is happening to my plant after I changed to 12/12 lighting...

[420amsdude]

I don't understand, it was all fine at first but then one of them started acting weird... during the 12 hours of darkness the plant seems to be okay because when I come in to turn on the light the leafs are all normal and pretty but then an hour or so after the lights are on they start to droop, I don't understand because it's not too hot, I have managed to keep the temperature about the same since they seedlings...
on the pictures you will see the difference, the first picture is right after 12 hours of darkness and the third and fourth picture is from when 12 hours of light... can someone tell me if this is normal? because only the tallest plant is going thru this problem, the other ones are fine during all cycles.

[Weezard]

I don't understand, it was all fine at first but then one of them started acting weird... during the 12 hours of darkness the plant seems to be okay because when I come in to turn on the light the leafs are all normal and pretty but then an hour or so after the lights are on they start to droop, I don't understand because it's not too hot, I have managed to keep the temperature about the same since they seedlings...
on the pictures you will see the difference, the first picture is right after 12 hours of darkness and the third and fourth picture is from when 12 hours of light... can someone tell me if this is normal? because only the tallest plant is going thru this problem, the other ones are fine during all cycles.

That's because she has the biggest feet and needs new shoes.:D

Seriously, it takes energy to flower.
Your big girl is trying to transpire more rapidly than her pot size will allow.
Pot her up, and she should settle down.:)

Aloha,
Weezard

[420amsdude]

That's because she has the biggest feet and needs new shoes.:D

Seriously, it takes energy to flower.
Your big girl is trying to transpire more rapidly than her pot size will allow.
Pot her up, and she should settle down.:)

Aloha,
Weezard

but I just transplanted it from a 2 liter to a 11 liter pot, which this is suppose to be the last pot, that's almost a 3 gallon pot... should I really transplant it to something bigger?

[420amsdude]

Your Equipment:
.1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) HPS
.2) Distance from tops?
2 foot
.3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)
bat wing
.4) Is there a consistent fresh air supply?
yes
.5) Do you have an exhaust fan and a circulation fan?
yes
.6) What are the bulb wattages, kelvin ratings, and schedule?
400 12/12

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...)
fertilized pre-mix
.8) Size of container.
11 liters (aprx. 3 gallons)
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings?
coconut sprouting pad

Your nutrients and water:
10) Source of water? (tap, bottled or filtered) What's it's ph before adjusting?
bottled pH 6.0
11) Method of checking water ph. (ph pen, test strips, aquarium test kit...)
N/A
12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...)
N/A
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule.
N/A
14) How often are you watering between feedings, and how much per watering?
whenever I feel the soil is dry.
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...)
none
16) Are your ph levels stable, or do they fluctuate?
stable
17) What is your ingoing water's ph? ...your runoff ph?
N/A
18) Do you foliar feed? If so, with what, how often, and at what time do you spray?
nope

Your growroom:
19) Indoors or outdoors?
indoors
20) What size of closet, room or hut?
7 ft tall X 3ft
21) What are the temps and humidity levels while lights are on? ...With lights off?
80F lights on humidity between 40-60%
68F lights off humidity between 50-65%
22) Have you seen signs of insects in the growroom?
none
Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?)
mainly indica (special kush from royal seeds)
24) From seeds or clones?
seeds
25) Is this an autoflower strain?
no.

[Dorje113]

Plants naturally droop during the dark period. It is normal. As long as they quickly react to the light and perk back up you should be fine.

Also, DO NOT disturb their dark period or they will not like it.

Good Luck.

[Rusty Trichome]

Your ingoing water ph is too low. For a peat-based medium, a ph of 6.3 to 6.8 is optimal for proper nutrient uptake.

Since you just transplanted them, they are possibly getting used to the fresh nutrients, too.

Cannabis needs a wet-dry cycle, but don't overdo it in either direction. Overwatered, they'll droop and the leaves get all puffy. Kinda like a quilted effect.

Without burning the plants, keep the lamp as close as possible. If the back of your hand can stand the heat for one minute, the ladies will be fine. My 400w HPS batwing was around 14-18 inches, if memory serves me. Not much lower than yours, but makes a big difference.

[420amsdude]

Plants naturally droop during the dark period. It is normal. As long as they quickly react to the light and perk back up you should be fine.

Also, DO NOT disturb their dark period or they will not like it.

Good Luck.

you misread my post, I said that they are drooping during the LIGHT period... during the DARK period the leafs goes back to normal ;)

[420amsdude]

Your ingoing water ph is too low. For a peat-based medium, a ph of 6.3 to 6.8 is optimal for proper nutrient uptake.

Since you just transplanted them, they are possibly getting used to the fresh nutrients, too.

Cannabis needs a wet-dry cycle, but don't overdo it in either direction. Overwatered, they'll droop and the leaves get all puffy. Kinda like a quilted effect.

Without burning the plants, keep the lamp as close as possible. If the back of your hand can stand the heat for one minute, the ladies will be fine. My 400w HPS batwing was around 14-18 inches, if memory serves me. Not much lower than yours, but makes a big difference.

thanks RT, I'll lower my lamp and see what happens... so you don't think I should transplant it to a bigger pot? cuz I think the one that it's in it right now it's fine

[Dorje113]

you misread my post, I said that they are drooping during the LIGHT period... during the DARK period the leafs goes back to normal ;)

During isn't good.

How long ago did you transplant? If this happened after transplant it could be shocked a little and will recover w/in a week

Get a pH tester and a soil test kit and see if anythings too far off. I can't tell what mix you're even using... wtf is a fertilized pre mix? If its generic potting soil, that could be an issue, it's usually too heavy and the plant can react like it's overwatered even if you let the soil dry out between waterings. But if it's a potting mix, the pH is prolly ok...

[420amsdude]

During isn't good.

How long ago did you transplant? If this happened after transplant it could be shocked a little and will recover w/in a week

Get a pH tester and a soil test kit and see if anythings too far off. I can't tell what mix you're even using... wtf is a fertilized pre mix? If its generic potting soil, that could be an issue, it's usually too heavy and the plant can react like it's overwatered even if you let the soil dry out between waterings. But if it's a potting mix, the pH is prolly ok...

the soil recommended to me by a famous growshop (specifically for cannabis plants) in Holland, so I don't think that it is the soil at all since loads of people use the same one and never complained.

[Dorje113]

the soil recommended to me by a famous growshop (specifically for cannabis plants) in Holland, so I don't think that it is the soil at all since loads of people use the same one and never complained.

Cool... give her some time. Maybe just transplant shock.

Still a good idea to keep track of Soil pH and NPK so you can make sure you're on track.

[420amsdude]

R.I.P. :(
it looked so lush green... now it's DEAD!