3 weeks into flowering. Leaves getting yellow. Any suggestions

so here is an overview.
First grow
I have 8 ladies in A 240x120x200cm room. 2x600 Watts hps In soil.
I don’t know if what’s happening is normal
During flower but my leaves are yellowing. My ppm is around 1100 so it’s a bit high. Don’t think they are hungry. Or are they.
Ph of soil is 6.3
Can I also have a prediction on yield.
I use bio Bizz nutes
Any suggestions.

Taktookato said:

Can I also have a prediction on yield.

Click to expand...

I've got one. I'm sure others do as well.

Johnny Lawrence said:

I've got one. I'm sure others do as well.

Click to expand...

Would be interested to hear yours

Taktookato said:

Would be interested to hear yours

Click to expand...

Give me a minute. I'm still crunching the numbers.

C’mon man. Need help over here would appreciate some advise

You’re at the right stage for CalMg def. Are you sure your meter is reading correctly? What’s the EC? My first thought was k deficiency.

Yield? Between 0.65 grams per watt of actual output and bout a pound.

As I’m sure Johnny can agree, looks to be bout a pound

Nute burn. Some strains can tak

Taktookato said:

so here is an overview.
First grow
I have 8 ladies in A 240x120x200cm room. 2x600 Watts hps In soil.
I don’t know if what’s happening is normal
During flower but my leaves are yellowing. My ppm is around 1100 so it’s a bit high. Don’t think they are hungry. Or are they.
Ph of soil is 6.3
Can I also have a prediction on yield.
I use bio Bizz nutes
Any suggestions.

Click to expand...

e anything you throw at them. Others you need to take care with. It's all fun and games

Try one tablespoon of Epsom salt per gallon of water on your next feeding. Maybe cut the nutes by a quarter. Your yeild will be 1 pound btw.

Interveinal chlorosis in the middle of the plant = magnesium deficiency. Especially that you 3rd week of flower.

Start at the bottom and working up?

P tox - too much P too early... very common in new growers.. No booster use and less N drop for the first 2 weeks of bloom.
Simply feed veg nutes for the first 2 weeks of bloom and up the bloom nutes over the next 10-14 days to directed use.

Bio Bizz seems to have this problem, as I've seen it for years here....Odd too. Their #'s aren't exactly bad..

Start in the middle and spread out? Mag def. - like Nutty say's... This could also lead to other issues from it also. Including the P thing..

So then. Did it start at the bottom or in the middle?

Started at the bottom for sure

I can’t comment on the yellow leaves but I can tell you the yield will be somewhere around a pound.

Make sure she has a little Nitrogen in those bloom nutes (if not add some) and as others have said make sure shes getting Cal Mag. Prob one of those two issues.

Yield can't be predicated as it depends on genetics and many other environmental factors.

Taktookato said:

Started at the bottom for sure

Click to expand...

Reduce P use and increase N use.
N Value goal is at least 3 for you.
P should be NO MORE then 5... for the rest of this run.