New grow Small problem. what do the pros think?

[dub151]

Hello everybody this is my first grow, everything has been going great except the pigment in a few of the plants is a littlle messed up! the first two pics are of the bad plants and one of one of the good ones!! what you guys think? 3 of the plants have this pigment problem the rest are mint feeding every second watering and superthrive once a week PH has been right around 6.8.
running a 400watt MH bulb till I turn it over to 12/12 with the 1000hps. its on a 18/6 now

 

[Boneman]

Welcome to RIU

I'm no pro, but you can probably ditch the superthrive at this point and try adding Cal-Mag at 1/2 strength to your feedings. Transplant soon and start flowering maybe a week later.

 

[TRICKKY]

Are the two with problems directly under the bulb?

I think that light may be a little too close.

What temp is it at the plants?

 

[dub151]

Are the two with problems directly under the bulb?

I think that light may be a little too close.

What temp is it at the plants?

temps are 82 under the light and 70 in the dark
I just moved the light to that position and I rotate them around every day

 

[SmokeMedprop215]

your plants look hot and I would drop your ph down to like a 6.3 looks like you could be coming into a nutrient problem if your ph is at 6.8 there are some essential nutrients that will not be allowed for uptake such as iron manganese zinc.... try bringing it down and see what happens.

 

[TRICKKY]

temps are 82 under the light and 70 in the dark
I just moved the light to that position and I rotate them around every day

82 is a little high IMO. 75f is groovy.

I hear you tho, if your rotating everyday they should all have that problem right?

 

[SmokeMedprop215]

lower your PH.......

 

[dub151]

lower your PH.......

sounds good Im going to lower the PH a tad! and hope it works! when you say the plants look hot how can you tell by the looks?

 

[SmokeMedprop215]

the leaves where they zig zag will turn up as they are trying to dissapate heat

 

[SmokeMedprop215]

the leaf edges will turn up when they are trying to dissapate heat and or start to have nute buildup try keeping your temps a tad lower like 75-78 when on and see what happens you could raise your light in the pic it looks too close

 

[dub151]

the leaf edges will turn up when they are trying to dissapate heat and or start to have nute buildup try keeping your temps a tad lower like 75-78 when on and see what happens you could raise your light in the pic it looks too close

cool light is raised up now!
its about 12 inches above the top of the leaves