Sick plants

[darkhaven8]

Problem: leaves curling and lower fan leaves are browning

Medium/grow method: promix bx 18L pots

Feed: and supplements used:advanced nutrients pH perfect micro, grow, bloom, B52, voodoo juice, overdrive, bud candy, flawless finish and nirvana as per feeding schedule

water source: tap water dechlorinated

Strain/age:think different most affected 23 days, Colorado cookies 23 days, haze xxl 23 days all autos

light used: 2 x mars hydro 300 classic model

Climate: 78F day, 70F night, humidity 49%

Additional info: first time using LED so not experienced with them yet. Only cfl grows prior

 

[Renaissance Redneck]

Problem: leaves curling and lower fan leaves are browning

Medium/grow method: promix bx 18L pots

Feed: and supplements used:advanced nutrients pH perfect micro, grow, bloom, B52, voodoo juice, overdrive, bud candy, flawless finish and nirvana as per feeding schedule

water source: tap water dechlorinated

Strain/age:think different most affected 23 days, Colorado cookies 23 days, haze xxl 23 days all autos

light used: 2 x mars hydro 300 classic model

Climate: 78F day, 70F night, humidity unknown

Additional info: first time using LED so not experienced with them yet. Only cfl grows prior

My eyes are really wrecked today, but this looks like multiple issues to me.
K def for sure, but the interveinal fading so early leads me to wonder if your pH is way off, or if your lights are too close.
What's your feeding schedule right now, and your pH numbers?

 

[darkhaven8]

haven't run checked ph. nutrients suppose to balance themselves i thought. feeding nute every 7-8 days water in between. lights 17" from top of plants. k def I was thinking mg?

 

[Rev. Green Genes]

It does present like potassium issue. It looks more advanced on one plant than others. You always have to check pH, there are so many factors that can throw it off. Anything you add will alter the pH. Most grow nutes raise it, and bloom nutes lower it. (or is that backward... lol) I wouldn't usually expect K def on such young plants. It must be a pH related lock out.

 

[namvet25]

Are you following the recommended dosage with your nutes? You might want to raise your lights up a little at this stage.

 

[namvet25]

Sorry, I just read you are following the manufacturers dosage but I would just stick with grow micro and bloom and hold off on the rest until there in full flower mode.I use the same nutes and havn't had any problems but using all those are a bit of overkill in my opinion.

 

[darkhaven8]

Sorry, I just read you are following the manufacturers dosage but I would just stick with grow micro and bloom and hold off on the rest until there in full flower mode.I use the same nutes and havn't had any problems but using all those are a bit of overkill in my opinion.

Only used micro, grow, bloom at half strength during week 1 feeding. Added in b52 and voodoo for second feeding.Today is 3rd scheduled nute and it calls for b52 every veg feeding so should i hold off and just use the 3 base nutes?

 

[darkhaven8]

i'll check pH asap needs new meter may take couple days

 

[darkhaven8]

Are you following the recommended dosage with your nutes? You might want to raise your lights up a little at this stage.

Raised lights to approx 21.5"

 

[Heavily Medicated]

Raised lights to approx 21.5"

Don't be afraid to raise them up even alittle more, I run the same lights and start out at 30" and let the girl grow up to within 24" then keep her at that distance until the stretch is over, then lower to 18" and leave there until harvest. LED is pretty intense up close and actually needs a little distance to blend the colors all together as designed. I am pretty sure that these distances is what MarsHydro recommeds. @MarshydroTina can you comment?