yellowing leaves

[stayhigh]

my leaves r yellowing in the middle. and some even have dead spots on them. i watered them about 2 days ago.i'm using miracle gro 1/4 strenth they're under 2 cfl and 2 4ft floros, and a 5 gallon pot. the third pic is another plant, any ideas on that one is appreciated.

 

[shuggy4105]

go to the "nutrient trouble shooter" sticky, it`s by Hick at the top of the "general indoor growing" page. it`s very handy, and has helped me identify problems. it tells you the treatment to use that will rectify your problems.
very good sticky IMO...
do you have perlite or vermiculite in that soil mix? if you do then it`s not enough, just going by the pics.

 

[FloydBanks]

I had a yellowing leave problem like you, turned out to be an Mg deficiancy. Put a little epsom salt in your water, then mist the leaves. That's what helped me.

 

[Growdude]

It looks droopy like its overwatered.
I also think it needs more light, it has a pale look to the leaves.

 

[shuggy4105]

or under-watered, a spray of epsom salt mix will do them no harm.
what`s your ph?

 

[stayhigh]

i don't have a reliable ph tester. the one i have constantly reads 7.2. can i spray the leaves with mg this late in flowering

 

[shuggy4105]

how old are they?