diagnose me

I am experiencing some issues with my leaves and cannot find the solution. They are White Russian, 25 days now in flower, under a SunMaster MH1000 full spectrum bulb. Lots of air movement (possibly to much) in the tent. The older fan leaves are turning yellow and falling off. Also some are green but have dark purple to black spots on them. Bigger spots not little dots. Looks like phosphorus deficiency from what I gather, but I am feeding them with Fox Farms Tiger bloom, and Big Bloom. Both have adequate levels of phosphorus, so not sure what to make of it. Will post pics if I can.

Take full plant picture if you can.
How much are you feeding and how often? What is your watering schedule like?
What kind of soil? What size pots?

not P def

that's for sure

I use 6.6ph water refill from the grocery store and when i add even 1tsp of of tiger bloom it drops my ph down To like 4.5. I always have to use ph up with tiger bloom. Could be a ph problem. Also read u r using a 1000 mh full spectum bulb. Would you happen to have a hps bulb for your hood? That could be an issue as well as mh is more for veg my friend

Rolla J said:

I use 6.6ph water refill from the grocery store and when i add even 1tsp of of tiger bloom it drops my ph down To like 4.5. I always have to use ph up with tiger bloom. Could be a ph problem. Also read u r using a 1000 mh full spectum bulb. Would you happen to have a hps bulb for your hood? That could be an issue as well as mh is more for veg my friend

Click to expand...

the ph thing should be checked I agree

but the bulb being hps or mh or a conversion or broad spectrum isn't related to that issue

you can flower under any of those bulbs... most use the hps in bloom but theres nothing wrong with using a mh in bloom either

Almost looks like overwatering to me but it's pretty bad pics

UOTE="Rolla J, post: 13674205, member: 963492"]I use 6.6ph water refill from the grocery store and when i add even 1tsp of of tiger bloom it drops my ph down To like 4.5. I always have to use ph up with tiger bloom. Could be a ph problem. Also read u r using a 1000 mh full spectum bulb. Would you happen to have a hps bulb for your hood? That could be an issue as well as mh is more for veg my friend[/QUOTE]
Ch

Runoff is 6.4 ph. In 3 gal. Buckets of coir/peat blend. Only happening to the older fan leaves. Tops look fine. I think my temps get a bit high in the day. 90 at most, but thats not constant. Tiger bloom doesn't cause dramatic changes in ph for me. Maybe check my digital meter to be sure. Ill post pics tomorrow.