Losing leaves at quick rate due to multiple things, please help

**PICS ADDED BELOW**

My leaves are turning yellow then falling off constantly. The top of the canopy is mostly fine and green but the bottom is mostly dying slowly.

This is most likely due to a combination of factors:

I overdosed them with nitrogen early and have been flushing ever since.
The light is to close to some of the leaves and its burning them [ I can only control this so much due to space restrictions and overgrowing this plant ].
I may have a K or Phosphorus deficiency due to only feeding water while its flowering?
It may also be rootbound, its in an 8.5l pot and its a tall plant, about 5-6 ft.

What do you think it could be that is killing the leaves? Im pretty worried by yield is gonna suffer badly.

Please help >_<

Pictures and more info please.

- Soil or hydro?
- Veg or Flower?
- Strain?
- pH levels?

Also, you say that you have been "flushing ever since", how often are you watering and how much? A single flush should be enough to take care of a nutrient abundance, and additional flushes could actually deplete nutrient levels in the soil.

Feeding till I get run-off, about 1 litre, then waiting till its dry. The soil I used had a slow release fertilizer in it.
Flowering.
Strain is unknown but the only one doing badly is the sativa, my smaller indicas are thriving. They are in the same tent and getting the same treatment watering wise, I feed the indica less water because it is much smaller.
pH levels are unknown. Im watering daily.

One thing that I forgot to ask for, is the age of the affected plants.

You say that you water until you get run off, and then you do not water again until the soil is dry. Then you say that you water daily. This is contradictory, and does not make sense. If you mean that the top is dry, then I highly suggest you start sticking your finger into the soil to test the moisture content at the root level.

Daily watering is far too much. You need to let the soil dry out some so that the roots expand throughout the entire growing container. Watering too often will cause you many problems, leeching is one of them. You are basically flushing your soil constantly, and not giving the plant any chance to grab nutrients. Also, watering too often slows down root development, as roots need both water and oxygen to develop.

More abundant/healthy roots = more effective nutrient uptake.

My advice is to water the same amount you have been, just less often. Water each plant once every three days and you should see some improvement. If chlorosis still persists, find a way to check pH levels to ensure that you are not having a nutrient lockout.

I honestly dont think feeding the 6ft plant once every 3 days is going to help at all, its flowering and has healthy buds. The age is approx 2 months and a few days old.

I water twice daily once in the morning, then once at night. It seems to need that much water ?

I will try what you said but I dont think it will help =\ the roots have expanded throughout the whole pot [they are on the surface of the soil almost].

My guess p k deficiency ...plant needs food...I notice when I starve em for a week the lower leaves go yellow ..shrink up n fall off.

My leaves definitely developed yellowing and deathly symptoms after I started feeding them nutes, then I over-did it.

Could my plants still be recovering from that?

Without pictures no one can tell you.

PIctures incoming , hold up!

First two pictures show the yellow, third is the canopy of the yellowing. Fourth is my smaller indica thats doing pretty damn well I think?

Does the yelloing only occur to fan leaves ? The dead leaves indicate that they fell off naturally. In flowering stage the plant sucks out all energy from fanleaves to to provide for bud growth. So as the flowering stage goes on more leaves will turn yellow. During the last weeks of flowering there is no need to provide the plants with nitrogen. But if the entire plant start turning yellow before the final stage i would fertilize. But your plant looks healthy. The dark green colour indicates there is enough nitrogen. So right now there is no need.

It occurs as pictured I guess? It just seems like some of the buds are going to have little to no thc on them near the bottom cause they cant grow big enough cause they lose their leaves faster than they grow them :< The top buds are quite nice tho