Chinesesmoker are you stoned? haha your plants get leggy if there stretching for light and 9/10 of the time the tallest plants are male as they grow quicker for pollenating the females and i use a 400watt hps and there Fine i get 4-5 ounce a plant -_-
SYMPTOMS
N
P
K
Ca
S
Mg
Fe
Mn
B
Mb
Zn
Cu
Over Fert.
Yellow Upper Leaves
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
Yellow Middle Leaves
No
No
No
No
No
No
No
No
No
Yes
No
No
No
Yellow Lower Leaves
Yes
Yes
Yes
No
No
Yes
No
No
No
No
No
No
No...
2 of the smaller plants look stretched a lot move the light closer and they double in size and have a look at this chart just in case u get any n p k promblems during flowerin.
SYMPTOMS
N
P
K
Ca
S
Mg
Fe
Mn
B
Mb
Zn
Cu
Over Fert.
Yellow Upper Leaves
No
No
No
No
Yes
No
Yes...
Hi The Yellowing is down to N deficency as some 1 has said most plants will loose lower leaves as the nutes go to the top of plant And the leaves die of due to no nutes at the bottom people have different opinions on ph but between 6.4 and 7.0 i would say that would be fine. Look at this table...