Help,leaf problems

[FLYERR]

Thanks for the help,they seem to be doing a little better.They have a lot of new growth,but it is very light green and the plant is darker green.I think the really good watering helped.They really never seem to be very dry and the room is never hot,I wonder if I am really underwatering them.I have tried to be very carefull about this but I could be a little rusty it has been 10 years since the last time I did this.

[stinkyattic]

Plant Abuse Chart - 420 Magazine
Marijuana Plants Problems - Yellow Leaves, brown spots, nutrient shortage etc.
Cannabis Headquarters - Cannabis Plant Nutrient Deficiencies (with pictures)

I can Google too- you can find and cut/paste it, but I don't think you actually recognize it- this is NOT enough information to say 'you have an Mg deficiency'.
"my leaves tips are rolling down and some are canoeing,....Now some lower leaves are showing some discoloration....all of a sudden they look like crap,"

Leaf tips rolling down, canoeing. Could be excessive N or water, or rootbound.
Low leaf discoloration (discolortion NOT described any further as to WHAT color or pattern it shows). Could be overwater, aging in flower, insufficient light, nute lockout, N deficiency.
Plants look like crap. Could be they were eaten by the cat, thrown in the rubbish by Mom, tipped over, stepped on,....

Just illustrating- don't make a firm diagnosis on such shaky description. Those charts are only so helpful, when it's the CAUSE of the problem that is more important than what is specifically being locked out.

[phatsesh101]

im sorry but i hardly think a statement with the words im think in it is a firm diagnosis. from what ive seen on here most people seem to have there minds made up or are already heavily leaning towards a diagnosis them selves. so ill often throw something out there to make them think again especially when thier symptoms exhibit a wide range of possibilities.