Help me diagnose?

[threepete23]

I've been veggin' for 18 days now under fluorescents. I just moved up to 100% nutes tonight.

There is a streak of yellow that is growing on one of my bigger leaves. I noticed it a week ago. I have looked in the stickies and such already, I am thinking it is a pH fluctuation problem, but I am far from an expert on my first grow, so I am hoping someone here can help me with this.

 

[lampshade]

I've been veggin' for 18 days now under fluorescents. I just moved up to 100% nutes tonight.

There is a streak of yellow that is growing on one of my bigger leaves. I noticed it a week ago. I have looked in the stickies and such already, I am thinking it is a pH fluctuation problem, but I am far from an expert on my first grow, so I am hoping someone here can help me with this.

Man thats so minor i wouldn't worry about it. It looks like maybe a K or Ca def but its prolly from a pH fluctuation so dont worry about it, keep growing the best you can and best of luck, Lamp.

 

[lampshade]

Also it looks like you need to transplant soon that will help them stretch out.

 

[wilsoncr17]

pH problems are easy to recognize as they either affect the whole plant, usually a sign of low pH, or just a specific level, i.e. whatever came out when the pH was to high will have brown spots or burnt tips, etc, but after the correction new growth looks fine, which is the sign of high pH. What youre looking at is probably from it bumping the light to hard when you moved it, and you just never thought of something like that causing damage when it looked fine at the time. Only thing I would recommend is wind to make sure they can hold the weight you want them to produce.

 

[threepete23]

Thanks everyone for posting, I transplanted pots today, my 400w HPS came in earlier and now they are all about a foot or so away from the light.. As for wind, I have an oscilating (sp?) fan in the corner, and a PC fan blowing across the canopy. Temps are staying at 72-75 and I am stoked. RH is 45%. My pH levels have been a little high. (pun intended) at 6.8-6.9. I'll add some pH down to my nutrient solution.

 

[lampshade]

Thanks everyone for posting, I transplanted pots today, my 400w HPS came in earlier and now they are all about a foot or so away from the light.. As for wind, I have an oscilating (sp?) fan in the corner, and a PC fan blowing across the canopy. Temps are staying at 72-75 and I am stoked. RH is 45%. My pH levels have been a little high. (pun intended) at 6.8-6.9. I'll add some pH down to my nutrient solution.

Sound good bro! Good luck. Keep us posted, also with soil its easy to balance with lemon juice for ph down and baking soda for ph up. Lamp