4 Strain SCROG, 8 plants, PROBLEMS!

ok,

so i have 4 diff strains under a 4x6 screen running 600w hps and a 400w mh.
its winter and im in the basment but we built a wall to section off part of it for growing.

room temp : 70F
room RH : 35-49%
photoperiod : 24/0
room size: 12x10'


when i measure the temp/rh at the canopy level its about 90F and 14%rh. the heat from the lights seem to burn off the humidity.

ventilation:
we are going to vent outside but right now i just have 290cfm can fan venting back into the main basement.

PROBLEMS:

droopy leaves (big time) not wilting, i thought it was overwatering so I stopped watering them and figgured i would let them driy till they wilted and then water just to be sure they were 100% dry.

while waiting days for the pots to dry out tons of leaves on ALL plants started getting crusty and brown/ necrotic spots all over. after seeing this and noticing that all the pots were very light and not seeing improvement i decided to ph my water and give a large dose of nutes. still no difference.

i will post pics after the weekend.

the big thing we did for this grow was switching from ocean forest soil to promix bx. i have been giving more nutes to compensate for the promix.

i mean if the leaves are getting crusty and they are wilting its gotta be ph or nut defficiancy right???

i took one plant and put it in my clset in the main house to see if it was enviromental as a controll plant. after about 4-5 days i still have not watered that plant and it is showing slight improvement. i do not plan to water it untill it wilts.

Dont wait till plant wilts before watering
Sounds like over fert, flush no nutes for a week then less nutes after that.
I dont think your light can "burn up humidity"

does over fertilizing cause drooping leaves?

teddy d said:

does over fertilizing cause drooping leaves?

Click to expand...

Over ferting will make leaves curl inwards like a claw and become dark green or start to burn.

Overwatering will make plants droop

Underwatering will make plants wilt rather than droop. When a plant wilts it gets very dry along the edges of the lower leaves and once watered they generally look nute burned along the edges.

Isnt promix bx a soiless mix ?

If its soiless then you should generally be feeding each watering just like you do with COCO.

I grow in coco and i always Cross reference my NUTE STRENGTH IN versus my NUTE STRENGTH OUT to determine how plants are feeding.

I use EC measurements and look for no more than a difference of 0.2 EC in either direction in my runoff.

You should also be aiming for 20% runoff out of the bottom of your pots.

This runoff can then be compared to original mix going in. This runoff will tell you how well they are feeding or if you are overfeeding.

If the reading decreases in your runoff compared to the strength of your nutes going in then you can increase the strength of your nutes. Anything over 0.2EC or around 150ppm needs adjusting.

If the reading increases in your runoff compared to the strength of your nutes going in then you need to decrease the strength of your nutes. Anything over 0.2EC or around 150ppm needs adjusting.


J

I say slow down man.
If you are growing 4 different strains in soil chances are its not a nutrient deficiency as each strain would have its own problems dont ya think? I think (from what you have described) that its the ability to transpire, that would effect the whole batch. If your soil has clogged the oxygen to the root system or you sprayed something under the leaves that has clogged the stomna would be my guess.

yes i think it is soilless but Its peat moss based which is acidic and not inert. so i have read to treat it as soil..

the controll plant that i moved to the closet has improved big time. it has not been watered in 12 days i am amazed how long it has been without wilting I just returned it to the growing area to see if its condition declines again.

i mean this is not my first grow so i can usually tell when the soil is dry a few inches down i water again. but maybe it was too often if this one has gone this long and is improving. also the worse they looked the more I was feeding. check out the pics.

is this nute burn? i think i may have overwatered and over fertilized at the same time. switching mediums may have been a bad idea for me. also the new growth does look like a claw and the leaves look kinda like clay or playdough if that makes any sense... the sapces between the veins are like tall ridges....



ph yeah, i have no way of measuring e.c. all i have is ph up and down with drops for testing.

holy shit. i think im root bound!!
it seems that the scrog method forced the plants to produce so many shoots that the root growth was fster than i have ever witnessed on larger plants at the end of flowering. this is a 2 gal bucket. I have 4 of the 8 plants in 5 gal and they look the same. do scrog growers tend to use larger containers in general?

is this my main problem??

If four of the eight plants are in larger buckets and they look the same then that doesnt sound like its the problem but have you heard of smart pots? The cloth bags. I use them and think they are great. From what you said about the one you haven't watered in a few days, that's looking better right? Maybe your just over watered.

that dosent look rootbound to you? i should add that the ones in larger pots are much bigger plants easily 4-5 feet if they were not under the screen.

its strange cuz i took them all out of the pots to look at the roots and they are 100% dry. i dont understand why this batch seems to want such a long dry period between waterings. every crop ive grown before was treated the same and had leaves standing at attention.

so i think im gonna wait a while to see if they improve without being watered(they should improve) and then repot to larger containers cuz thats a lot of roots for plants that are still in veg in 5 gal containers.

Actually no. That doesn't look root bound to me. The rule of thumb I follow is when the plant is 3 times the height of the pot I transplant. Unless of course I am using smart pots. I have grown plants 10 feet tall in smart pots that were about 16 inches tall. The deal is when the roots reach the sides of the pot and go through the cloth they are air pruned, causing the opposite side of the exposed root to explode with tiny roots going back into the pot. They make all sizes. Google them.

That is strange, you say they are dry... One way to be sure is to wait until they start to wilt before you water again then stay off nutes until you see them getting a bit yellow. How about air flow, are you getting enough co2 in there?

They are already turning yellow , it's not looking good. The one that got better was in a closet with no ventilation . I think I have enough c02. Damn I hate this trouble shooting. It could be 10 things or 4 things in combo for all I know.
I have moved 2 more plants to the closet and re potted on in the grow area to see how those react. They are deff lacking mutes now though. I'm thinking of foliar feeding they are lime green now going yellow.

Wow, no, not good. They are dry enough. Sounds like your on the right track with larger pots and more soil.
Well, like you say it could be a lot of things, that's about all I can think of.

Good luck man.

so i went to my local hydro store and he said if I have 4 types of plants at different stages of growth and all the same syptoms i described came on at the same time that it is 95% a salt build up. he said that since promix bx is a soiless mix it is more likely to build up salt and should be flushed monthly. i bought some Clearex and tried flushing a few. I hope this is the answer, and it kinda makes sense because the worse they looked the more nutes i was giving thus creating more salt buildup.

fingers crossed. he said it should only take a a day or two to see a big difference.

thanks for the replies keep em coming. i appreciate all the help guys.

i also bought a digi ph meter

so a few look a little better but a bunch still look realy bad, and the one that was "cured" and put back with the others looks like shit again! i dont know what to do.