ProMix BX - C99 clones - Purple stems

[Jonnysact]

Good morning family!

I'm back again in need of your expert advise. I'm growing 3 C99 clones from Female Seeds in Promix BX with 25% added perlite and am running into problems, yet again. The clones were taken mid Feb from a very healthy mama that was grown in Coco:

Coco C99 Mama:

The clones rooted in Promix BX within 7-10 days and began vegging early March and although growth is happening (perhaps a touch slower than expected) any new green stem turns purple within a few days. I just dream of having a healthy promix plant. It takes 3-4 days for the plant to completely dry in their 1 Gal containers and my gut tells me that the reason they were so healthy in coco and now suffer in the promix is that the roots are lacking in oxygen, but am not 100% sure. I feel as though maybe I should not be watering to runoff as to keep the medium wet but not soaked. And I have been VERY carefuly as to NEVER water until the pots are quite light and the top inch or two are dry. I've run into far too many problems in the past with overwatering PM and getting all kinds of deficiencies as I watch the PH crash. Alright, so, a few details:


Strain: C99 from Female Seeds - Clone cuttings
Medium: Promix BX with 25% added perlite
Container: 1 Gal
Water: Tap water is 160ppm
Feed: 450ppm (total) pH 6.5 Every watering (3-4 days) with GH Flora Nova Bloom
Runoff: 5-10% - pH 6.2 - roughly same PPM out as PPM in. Mild nute burn but also lockout/deficiency.
Canopy temps: 75*
Humidity: 40%
Light: 2 x 150w Kessil purple - 10" distance

Pictures:

Thank you all for your help. I miss Coco but do not want to continue daily watering and am dedicated to figuring out promix, once and for all.

 

[HqFarms]

Back off feeding every time you water. They are over fed, you can tell by the burnt tips. Once you stop thinking by schedules and feeding what they need, your plants will be much happier

 

[eyes]

I always had problems with salts in pro-mix. I like synthetics in water or hydro. Ive recently run coco and worm castings with some ammendments. Seems to be the ticket since the coco is not acidic and is neutral. I wash my coco for any residual salt before i add ammendments.

You may want to try organic ammendments like I have. Alls i do is add r.o water with a tds of 70 and thats it. No deficiencies or lock up problems.

 

[Budley Doright]

Ive used promix for years..... I feed with every watering...and dont do the runoff thing....

I dont see a particular issue with burnt tips...

In the old days the fert strength was gauged based on upping the ferts until you see some burnt tips then back off a bit....

I use peters and calcium nitrate.... at 600 ppm.....I really dont care what the ppm of the water is..... since most of that is not usable by the plant...

I water when the surface of the container is about half dry.... I water enough so that the plant surface dries in a couple days at most......

Bx retains water becuase of the vermiculite.... if you want a medium that dries faster try promix hp.....

I have used both right out of the bag.....

Peters is much cheaper and many growers use the stuff with great results.....

Im a firm believer in fertigation with every watering....you must adjust based on the plants reaction.....

 

[Jonnysact]

Hey guys. Appreciate your help but let's try to work with the ingredients I've already got in this soup yes?

I would love to use Promix HP, but my local grow shop doesn't have it. I need to find success with this setup but need to identify the culprit.

With my setup, what could be going wrong? Thanks I'm using tools and feed that have been proven successful to many for a long time. Let's see if we can see what the issue at hand is.

 

[Budley Doright]

Wellif thats the case you should refer to a thread using the ferts you are using....

I suggested peters because its a path well traveled....easy to find mentors....

If the feed you are using has been successful to many for a long time..../

YOu my friend are barking up the wrong tree.....

 

[HqFarms]

Hey guys. Appreciate your help but let's try to work with the ingredients I've already got in this soup yes?

I would love to use Promix HP, but my local grow shop doesn't have it. I need to find success with this setup but need to identify the culprit.

With my setup, what could be going wrong? Thanks I'm using tools and feed that have been proven successful to many for a long time. Let's see if we can see what the issue at hand is.

What works for some might not work for others. There are lots of variables that can change your outcome. Either cut your nutes down or don't feed every water. Since you went to work with what you got, those are about the only options you have

 

[Jonnysact]

Sounds good. I'll cut back on the nutes and see how she fares. Might be a good opportunity to treat a few of them differently and note the effects.

Gracias.

 

[Budley Doright]

I'm using tools and feed that have been proven successful to many for a long time.

Might be a good opportunity to treat a few of them differently and note the effects.

=======================


I suggested using jacks because you feed your plants at 600 ppm from beginning to end....

So instead of finding a mentor you are going to reinvent the wheel....

As my grandpa used to say..... you can lead a horse to water....but a mule is harder....

 

[Speed of green]

led's can cause purple stems. the plant looks healthy otherwise.

 

[panckage]

I'm currently growing c99 from female seeds as well. 2 or 3 of the 5 plants have red stems as well, including my most vigorous plant. I don't think its any issue. I think it is just a quirk of one of the phenos

 

[crazy_eagle]

Im pretty sure its the genetics cause im running female seeds c-99 and on both plants the stem is purplish. One is a runt and just not uptaking the water.

 

[Jonnysact]

I'm currently growing c99 from female seeds as well. 2 or 3 of the 5 plants have red stems as well, including my most vigorous plant. I don't think its any issue. I think it is just a quirk of one of the phenos

Unfortunately this is not the case. The mother was green, green green in coco. Not a string of purple anywhere. The purple is due to stress/ph/deficiency/lockout.

Stopped nuting them and checking runoff. Going in at 6.6, coming out at 6.1. New growth is pale, purple stems and petiole. This leads me to believe I'm getting P and Cal Mag lockout. Need to get the PH up.

 

[redlaser]

I ph to 5.8 with pro-mix but the run off will be around 6.5. I think if you look at nutrient availability charts phosphorous becomes unavailable above mid 6's in ph.
Have you checked the ec of your runoff yet? That may yield some clues.

Since I had to start using R.o water I have to check everything, never had to before with promix