6 weeks old turning leaves turning yellow and dropping at a fast rate.

That's nitrogen deficiency. Starting on older leaves going up. Are you using any nutrients or just water? If it is pH problem all you got to do is stream pHd water 3x the volume of the pot. Make sure you got good ventilation in your grow so that the plants dries well. That pot seems nice I assume it has good drainage? Hope this helps good luck.

When I flush it’s not over days I Reum 3x5 times the volume of water it takes to hit starutation and 20% run off over a hour or two then let soil dry up 3-4 days untill it’s dry before feeding

https://www.growweedeasy.com/cannabis-symptoms-pictures

thanks everyone. the reason for the wet soil is that I started flushing in this past two days. I increased the cal nutritions in the past week so I would go with the opinion of PH or nutrition lock. washed water PH is at the 5.5 - 6 which is not very off. do you recommend that I stop the flush and just let it dry then water with PH6 water and no nutritions?

Looks like a root problem. Blue is copper deficiency, which Is rare or too cold. Yellowing bottom up is nitrogen deficiency. So I am gonna go with over watering or lack of nutrition. If overwatering, you may be experiencing root rot. Extra cause perlite in future mixes will help with giving more air to roots and resistance to overwatering

Yeah the soil looks super wet, let it dry for a couple days, then I would feed them some cal mag🤟🏽🌱

By how plant consumes himself from oldest to new - think it's huge hunger. But you mentioned so many things, which could easy relate to state of girls ... Good pH and watering regime - is essential in growing. Lifting pots is easy to determine is she ready for watering or not. Your soil looks very compact, but maybe those coconut pots will give enough air for roots. Give them little food and let them dry before watering, never rush. If pH and the rest was good - that's how lack of nitrogen would look ... All the Best !

Is it me or does your soil look really wet? if so, you might have been giving them to much water with or without nutrients. When you give to much nutrients, your plants will go into shutdown and will no longer drink up your feeding. I notice some yellow tips on your leaves, this indicates overfeeding. Next time when you start seeing some, reduce your nutrients with like 10% and you will be ok. For now, you should flush your plants even thought they look overwaterd. Make sure you check your PH and EC levels <- really important. If you have high/low PH/EC levels make sure you flush it until it have the right level. At growing state it should be arround 6.0PH with like 0.7-1.6 EC ( it depends on how big your plant is plus more reasons) When you get the right level, it will take some days before they start drinking again. Thoose yellow leaves will never get green again, you can take them of or let them stay so your plant can absorb nutrients from it. When it gets brown you should take it off. Goodluck.