[bon]

Got this problem the last three times... Always in the vegging room. Recently i changed my veg closet, bought a Homebox xs with a 250watt grow lamp, 160m³/h exhaust going to the window, which is always open. It's definalty not the genetics, cuz i've tried different genetics and they all turn out like this (see pics).

Tried feeding them (bionova), tried not feeding them, tried superthrive, tried new soil...

Sometimes the RH drops down to 10%, but that's never for a long time, and i spray them often...

It's driving me crazy...

Pics (just after i sprayed them):


The funny thing is, there are always some plants who are looking really healty (upper right corner and the one on the left of it):


Hope somebody can help me...

cheers!

[woolyhead]

what soil are you using for the young uns?

[bon]

i'm using plagron light mix, later on, the bigger ones in the last picture, plagron grow mix.

But that shouldn't be the problem, i've switched the soil with the same results...

I think they look kinda burned, but the lights are like 40cm away. Could this be light burn, not as in too close to the lights but as in too much hours light? My veg room is on 24h light to keep a stable climate inside the tent...

Drives me crazy :laugh:

[woolyhead]

what about ventilation,rh 10%? is that your humidity,sorry not very good with abreiviations,cant even spell it.vegging humidity should be a lot higher about 60% or the plants wont be able to transpire properly

[bon]

ventilation could be the issue, but i don't think so... Window is always open, plus i never had that problem before the last three runs...

Could this be because i'm still on 24h light? I do this because then i can keep a constant climate in the tent. Now that i think about it, they look like they've had lightstress, and the last three runs were on 24h vegging, before i did the old 16h light 8h dark...

Thanks for thinking along with me woolyhead.

cheers

[woolyhead]

i run my veg room 18/6,gives everything a rest.can you turn down the extraction,10% humidity is very low.I have vegged in a little cupboard with no extraction,humidity would range from about 40% with door open and up to over 70% with door shut with no problem.vegging plants can handle higher humidity,its when you flower you got to drop it down

[bon]

i'll be turning down the exhaust when i get back from work. Sounds logic, i also noticed that there was a good breeze into the tent, maybe the 160m³/h is too much for a 60cm x 60cm x 120cm...

I hope they'll survive...

cheers!

[Hazeseeker]

Hi Bon,
definately reduce the light cycle to either 20/4 or 18/6, IMO plants definately benifit from the 4 or 6 hours darkness, also i'd say stop spraying the plants with water altogether, hopefully you manage to get it fixed bro

Peace
Hazeseeker

[Midnightgardener]

it looks to me that you have root burn, increase your humidity and lower your temps, spray with foliar feed and no more food till they have greened up from the foliar spray, give little shots of water not a big amount at once.also veg in smaller pots as there is less soil to mess with the fragile roots, seen this before, they come right when the conditions are set right, remeber the soil you are using has plenty nutes for your small plants, also when in veg mode try use seedling mix for the start and then feeding is better obsorbed,
foliar spray will make a big difference,
good luck
grow logic
regards
MG

PS invest in a good humidifier and hygrostat, check my thread growstuff for sale