White widow pale leaves - Sulfur Def?

Its my first grow. Here i'm growing two plants - white widow and lemon skunk. White widow grows much faster, but started to show some light green - pale leaves. I started to use biobizz biogrow in second veg week, thought the soil has worm castings in it. Can it be sulfur deficiency?

Right now i have only cheap mechanic PH and moisture tester (2 in 1) so i cant test PH acurately. It alwasy shows 7 no matter where i put it . Is there any way without ph tester?

Thanks for your replies.

overall id say they are ok. 7.0 pH in soil is acceptable, even tho 6.5 is ideal.

what i would do is use a N heavy fertilizer, at 1/2 strength. i got one thats 9-3-4 i think, works great. also fertilizers that are N heavy usually bring pH down a lil. so you kill 2 birds with one stone. id add nitrogen just cuz they are a light green, i like a darker green. and you are faaaaaaaar from nitrogen abundance (dark dark green -> black) leaves.

Just an extra tip, I was looking at your pics and if you watered a couple of hours before you took this pic t'sal goood and a bit of N dif. However, if you didn't water within a couple of hours before this pics you could have N lockout due to overwatering.

cant say whats causing that at a early stage but i grow white widow on my 3rd grow of it now and every time the leaves will yellow on me n badly as well later on in flower but they seem to get the job done if u can keep her in check to a degree, check out my album white widow and u will see all the yellow probs u can av but u will also see just how much bud u can get from a plant that aint 100% coz i got 4 dry ounces off me best girl last grow n the bud was killer potent so hang in there coz she will reward u well if like a sed u can keep her in check to a degree! good look and learn all u can coz i was told were gonna be the best judge of our plants so learn ya shit and before u no it u will b high as mofo thinkin : man i grew that shit :lol, peace out

MoonRaver said:

Just an extra tip, I was looking at your pics and if you watered a couple of hours before you took this pic t'sal goood and a bit of N dif. However, if you didn't water within a couple of hours before this pics you could have N lockout due to overwatering.

Click to expand...

Hi,
I have watered it yesterday. If N is locked due overwatering maybe i should transplant it to another pot with new soil, what do you think? I was watering it once in two days. But i were afraid of that too.
Thanks for reply.

probably just need some more food, with sulfur def, the stems will purple and your plant wont look so happy, you get sulfur def. with to high a ph. you can get a GH up and down PH kit from your hydro store, or the internet

Hello everyone,
Here's update on my growing, the problem still remains. Bigger plant (white widow) leaves are more yellow than before and bent down. Before watering they were bent down too.
As you can see smaller plant - lemon skunk looks good but allready has some sign of the same problem. I have transplanted both plants to bigger pots since last post - i could allready see roots going through the soil when took out the plants.

Maybe it could be due to lights being too close to the leaves? I use cfl 25 and 45 watt bulbs.