Normal late-stage yellowing or ..!

This is my 8th indoor grow, first indoor photoperiod, and I’m in week 7 of flowering.

I’ve had this dynamic with each of my seven prior autoflower grows where the plants are pretty much dead by the time the trichomes start turning amber and I don’t want that to happen.

I know you typically see leaves turning yellow toward the end but does this look like normal behavior or some sort of deficiency?

Specifics:

Four amnesia haze sativa-dominant photoperiods from seed.
Week of flowering.
2x4 tent is 75 degrees 65% rh
12/12 light schedule
Spyder sf 2000 led 200 watt
Lumens - 50,000
Fox farms ocean forest soil, five gallon fabric pot
Alkaline spring water with high ph and low tds.
Watering/feeding at ph 6.3 and using one tsp liquid calmag with feedings along with Fox Farm’s recommended nutes by week
Flush every 3-4 weeks with ph-adjusted water

What week of flowering are you in? And the ppm your feeding her. She looks hungry in my opinion. I may be wrong.

Bose said:

What week of flowering are you in? And the ppm your feeding her. She looks hungry in my opinion. I may be wrong.

Click to expand...

Thanks. Week 7 and ppm is around 1200 at feeding

You didn't say what week flowering. It looks like a nutrient imbalance. Actually now looking at your post again, you're using foxfarm. So are you using all 12 bottles of foxfarm? I would advise against that. From here on out from the fox farm line just give it 1 tsp of grow big and 1 tsp of tiger bloom mixed per feeding plus a tsp of cal mag is fine. 1 gallon of water per 5 gallon pot should be suffice. And stop flushing, don't ever flush soil its pointless unless you forgot to dilute your nutrients or something and you absolutely have to flush or it will die.

Yellowing leaves are never a normal thing. Plants should stay green (or purp and red etc with cooler temps) up until harvest. Yellowing means issues.

That's totally normal when using Fox Farms nutrients. I quit FF, now use GH Flora Nova with great results and no issues.

Thanks all. Def tricky, this sport is.

Driver733 said:

That's totally normal when using Fox Farms nutrients. I quit FF, now use GH Flora Nova with great results and no issues.

Click to expand...

Thanks. Is that only suitable for hydro?

Stop flushing - it imbalances the medium and LEACHES the nutrients that it will use. Yellowing / pigmentation loss is pretty evident.

Not sure why you have to use “ natural spring water “ that is kind of bougie and unnecessary. Fox farm ocean forest is prebuffered and will run on TAP.
No smart water or other nonsense.

As a natter of fact - you can literally STOP using FF nutes and just re-amend your grow containers with a cup or two of fresh Fox Farm soil …. That is by far the easiest / no drama way to continue feed. A simple topdressing as I describe will continue to recharge what the plant already used and feed without measuring anything. Add and water thats it.

And if a heavy feeding strain , do again 2 weeks later.
Nutes will become available to plant easily for 2 weeks between topdress.

Tedmarx38 said:

Thanks. Is that only suitable for hydro?

Click to expand...

No, I still use FF Ocean Forest for soil, and 3 gallon fabric pots to finish. The Flora Nova has everything needed, including cal-mag, simple and easy.

Budzbuddha said:

Stop flushing - it imbalances the medium and LEACHES the nutrients that it will use. Yellowing / pigmentation loss is pretty evident.

Not sure why you have to use “ natural spring water “ that is kind of bougie and unnecessary. Fox farm ocean forest is prebuffered and will run on TAP.
No smart water or other nonsense.

As a natter of fact - you can literally STOP using FF nutes and just re-amend your grow containers with a cup or two of fresh Fox Farm soil …. That is by far the easiest / no drama way to continue feed. A simple topdressing as I describe will continue to recharge what the plant already used and feed without measuring anything. Add and water thats it.

And if a heavy feeding strain , do again 2 weeks later.
Nutes will become available to plant easily for 2 weeks between topdress.

Click to expand...

Thanks - yeah I wish the water was by choice but it’s the spring that supplies the entire household. Appreciate your view though

Tedmarx38 said:

Thanks. Week 7 and ppm is around 1200 at feeding

Click to expand...

I would get it down to 900 at the most speaking from experience

Are you sure you are feeding at 6.3 pH ? It definitely looks like you have more than 1 issue going on. Overfeeding is part of it but I have a feeling that it's a pH problem too. Is it a decent pH metre and you keeping the probe wet and calibrating once a month?

If your last 7 grows have all looked like this it's time to rethink the strategy. These plants need the bare minimum to do amazing things. Drop the ppm to about 750 and learn to water by weight of the pot. + get the pH on point, for soil 6.0 from seed to flower is perfect.

Kola_Kreator said:

Are you sure you are feeding at 6.3 pH ? It definitely looks like you have more than 1 issue going on. Overfeeding is part of it but I have a feeling that it's a pH problem too. Is it a decent pH metre and you keeping the probe wet and calibrating once a month?

If your last 7 grows have all looked like this it's time to rethink the strategy. These plants need the bare minimum to do amazing things. Drop the ppm to about 750 and learn to water by weight of the pot. + get the pH on point, for soil 6.0 from seed to flower is perfect.

Click to expand...

Thanks, yeah I had trouble with ph early on and bought an Apera meter. I think overfeeding explains it all but I’ll know more when my other grow flowers, as I’ve changed my routine for that one.

They look pretty fried... not sure if you got all the issues from lockouts rather than having not enough nutes, tbh.

edit: sorry read about the lumens 50k seems a bit mucho for the end of your run. 40-45k would be enough in my book.

It's frying with all this fertilizer, what's your ec?

800 to 1200 depending on the mix I use for a particular feeding. Based on the feedback here I’ve cut the doses dramatically and they’re all holding steady now. Appreciate it