yellow leaves - need advice [pics]

-indoor

sunshine mix #4 w/worm castings & perlite

mid flower

nuts= combination of foxfarm & h&g

water every 3-4 days

1000w hortilux - glass/vented 30" from glass

day temp=74-77 nite temp 66-70-%

humidity 60-75%

12/12 schedule

vented like a champ




after thinking it was nitrogen deficiency i hit all plants hard with nutrients

some have begun to darken up from lime color and are looking good.

others ...not so good- have turned brighter lime and started to burn.


leaf pictures are from the very few leaves that are burned that bad ....mostly they are bright lime w/ a little burning.

one thing i am dealing with is the possibility of plants being too big for the pots. they vegd to long and are possibly root bound.

seems to be confined to a couple strains and not others. only i cant tell you which ones are which at this point sorry !

all my homies are out of town -so i turn to you fine folk of the weednerd sect.


any thoughts suggestions advice


wil be greatly appreciated - thanx




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If they arent responding to ferts or worse burning


complete a soil runoff PH test.......
with PH corrected water (6.5-6.8PH ) pour enough water in the pots so the water runs out the bottom of the pot ...collect & test the PH of this runoff water....post both the watering going in the pots and the runoff ph

ok ..will do tomorrow night.

plants are doing well -not getting worse.

post results late tomorrow nite.
thanks

Looks like Mg but how far into flr are you? Have you ever tried epson salts 1/8 tsp per gal, grind up first so easily mixed. Don't forget to ph water first! What do for water? How do you prep your water/nutes? Remember if root feed does'nt fix in 3-4 days maybe lok-up,then try folier.

believe it or not it was a heat problem. my lights were not vented enough and were cookin some plants. sorted that out by going to a larger fan size.

other than that plants are healthy, with normal yellowing and leaf loss. soil ph is perfect . ladies are swelling...


thanks for your responces.

bestys!!!