2 strains both with different problems

[falcao_mufc]

Hi i was wondering if anyone can help. 2 strains grown from seed - blue cheese & northern lights. Grown in biobizz all mix, under cfl from seed to 2 weeks then under a 600w hps for the last few days (both are just under 3 weeks old).

The NL is on the right of the pic and has always been lagging behind. Under the cfls its leaves started to curl upwards at the edges, even though the temps were 21-24c




Now the blu cheese isnt looking as healthy as it did, with a couple of white/yellow spots forming on a couple of the fan leaves, and the very edges of the leaves look to be curling upwards. They have also started drooping down at the tips

Temps under the hps are 23-28c and i have it about 18inches away. Humidity is only 30-45. Ive fed them no nutrients. Water about a litre every couple of days when soil is dry a couple of inches down, with water thats about ph7. Pots are only 4.8 litres each.

 

[falcao_mufc]

I had given them a mist when i took the pics, the spot is just below middle of the pic in the bottom one, and on the tip in the top one. The misting and the camera makes it look alot yellower and spottier then it is!

 

[Diabolical666]

Misting them is your problem, you are creating water hot spots. The leaf curling is more heat stress. Clay pots retain heat and will also cook your plants

 

[falcao_mufc]

Thanks for your help, i was misting them to try and raise humidity when the NL started to curl up. Ill refrain from it and transfer them to larger pots.

 

[mike4c4]

yes stop misting and the NL heat stress can cause that but i would let the soil dry more. the edges of the leaves curl up to try to get rid of moisture.

 

[falcao_mufc]

I thought they curled up to retain moisture?

 

[mike4c4]

I thought they curled up to retain moisture?[/QUOT
nope, but leaves on trees do that.

 

[ayr0n]

hmm I never had an issue with misting under HID. I foliar feed frequently (several times a week), and even when I don't feed I like to spray pH'd water on em throughout the day...I've been told multiple times by multiple growers not to do this, but my girls seem to love it...They always seem to perk up and look healthier a couple hours after a foliar feed followed by a light misting of dilluted neem oil - Maybe the big difference is using an oscillating fan. I think if you keep the leaves gently moving consistently there is never a 'hot spot' of magnified light / heat from beads of water on the leaves for longer than a couple seconds.

 

[falcao_mufc]

I have a fan in the room the gently moves the leaves. Today i repotted them into buckets and i noticed the following:

This was the blue cheese. The roots in the NL were fine albeit not as dense. Whats that dark stuff? Hope she'll be ok.

The leaves are also coming up with more yellow marks of doom. She isnt glowing with a dark green like she used to either:

The NL is showing yellow at the very tips of the new growth:



I have my 600w HID 18inches away and its on 24/7 because it drops to <15c with the lights off. Im gonna turn it to 18/6 tomorrow with an oil radiator coming on 15min before lights out and switching off an hour before lights on.

Also why do the lights make the pictures have lines?!?

 

[ayr0n]

Also why do the lights make the pictures have lines?!?

HPS lights cause the lines...some camera settings can fix it (cant remember off the top of my head). A lot of ppl either take them out of the light for pics or take pics when the lights are off. I think it's something to do w/ the frame rate

 

[falcao_mufc]

The northern lights with its yellow tips



The blue cheeses acne



My babies, you wouldnt think they were born only a day apart!

 

[atidd11]

The stunted one you over fertilized

 

[falcao_mufc]

The stunted one you over fertilized

I havent fertilized

 

[ayr0n]

The northern lights with its yellow tips

View attachment 3296181

The blue cheeses acne
View attachment 3296182


My babies, you wouldnt think they were born only a day apart!View attachment 3296183

It's crazy how much different strains can vary in the same environment / conditions - left one definitely looks like heat stress to me but the one on the right looks fine like the temps haven't affected it at all. I guess PMS can be caused by more than just heat stress, but that taco'ing looks like it was cooking for a while

 

[atidd11]

Then it's got to be heat stress. Like person above said. She was cooking for a while

 

[atidd11]

I'd just back the plants off for now until u figure out how close is safe.

 

[falcao_mufc]

What about the root discolouration on the blue cheese?

 

[falcao_mufc]

What about the root discolouration on the blue cheese?

Anyone? Pics a few posts up

 

[Kush Knight]

misting is the root of a lot of the problems here. Its causing over watering and heat stress.
I would start them on a light feed regiment, maybe 1/4 strength every other watering, or 1/2 strength every third.
good job on getting them out of the terracotta btw.
Oh and are you really pHing? Because it looks like you aren't. Guessing is just so stupid.
I mean, "This water looks about 8, better fix it."

 

[falcao_mufc]

misting is the root of a lot of the problems here. Its causing over watering and heat stress.
I would start them on a light feed regiment, maybe 1/4 strength every other watering, or 1/2 strength every third.
good job on getting them out of the terracotta btw.
Oh and are you really pHing? Because it looks like you aren't. Guessing is just so stupid.
I mean, "This water looks about 8, better fix it."

I have a ph test kit but its the colour one and its difficult to compare to the chart. Ive stopped misting since a few days and ive lifted the light to 22 inches from 18. I have put a 7 inch fan blowing on the light from a few inches away as of tonight. Thanks for everyones help