M
max_well
- 85
- 8
Thanks for the input again, and SC thanks for the photo.
Yes, my issue doesn't look like textbook Mg deficiency .. put it's not the solution pH .. meter calibrated at 4.0, 7.0 every use. Also , 3 other strains in the room looking pretty perfect, and all are getting the same diet.
So I think it's a deficiency.
My issue actually looks pretty close to those in this thread:
Which was diagnosed as an Fe problem.. Seems like a more obscure kind of issue, especially in coco using a complete hydro nutrient. But could be a strain thing. Any thoughts on Fe? Calmag contains 0.1% iron from iron EDTA.
thanks
Max
Old thread but SC is very spot on with this post. Damn. I know plants and hydroponic mineral nutrition like the back of my hand and this post is very well worded.I'll go out on a limb and actually propose this is a cation issue. I have Cal-Mag Plus, Canna Coco A+B, clean water, and a perfectly calibrated (to 1394ppm) Hanna Gro'Chek pH/EC/PPM meter and I know exactly what a 10ml A, 10ml B, and 5ml Cal-Mag Plus comes out to.
You're looking at more like 1.95EC at that strength even in RO water.
If you haven't calibrated that meter (do you even need to calibrate the Blue Labs?) then if I were you that'd be a good starting point. Ensuring your meter is calibrated will help diagnose the problem going forward.
The nutrient ratio you are running right now is close to a 4-1-2 with an equal amount of Calcium to Nitrogen. If you've been doing this for a while, and the plant has been in this planter for a few weeks, then you've likely filled the Calcium buffer. Pushing continuously high levels of Calcium (in addition to what is already in the A+B) will cause an issue with the uptake of other elements.
I find the first few threads of flowering to be the most difficult in coco. My approach during the stretch period is to run a much more balanced 1-1-1 (or a 2-2-3) and to watch my runoff EC very closely.
In addition, with regards to the Canna nutrient schedule, you should be running the 0-2-1 Cannazym at full strength right now to help balance out the PK ratios. This ratio fixer is a critical component of the Canna system.
My suggestion to you is this:
The next time you water feed mix up a solution of just the A+B at exactly 1.0ec. When you feed I want you to collect maybe 1-2L of runoff and test the EC. If it is over 1.3ec that means you're washing out a lot of excess. That means you need to continue rinsing your media with the 1.0ec solution until the deviance between what is going in and what is coming out is within 30% (or 1.0 in and <1.3 out)
Going forward into weeks 3 and 4 this will help ensure you have a clean media that still has its high CEC and complete Calcium buffer. After the 1.0EC "rinsing" then you can incorporate your Cannazym or other high phosphorus supplement to balance out the ratios.
But if you take anything away from this post I want it to be the diligence required of new Coco growers to runoff and testing of that runoff. It doesn't matter what strength solution you are using if the runoff is over 3.0EC. Gotta rinse, never flush, and hit week 3 of flowering ready to be pushed.
I'll go out on a limb and actually propose this is a cation issue. I have Cal-Mag Plus, Canna Coco A+B, clean water, and a perfectly calibrated (to 1394ppm) Hanna Gro'Chek pH/EC/PPM meter and I know exactly what a 10ml A, 10ml B, and 5ml Cal-Mag Plus comes out to.
You're looking at more like 1.95EC at that strength even in RO water.
If you haven't calibrated that meter (do you even need to calibrate the Blue Labs?) then if I were you that'd be a good starting point. Ensuring your meter is calibrated will help diagnose the problem going forward.
The nutrient ratio you are running right now is close to a 4-1-2 with an equal amount of Calcium to Nitrogen. If you've been doing this for a while, and the plant has been in this planter for a few weeks, then you've likely filled the Calcium buffer. Pushing continuously high levels of Calcium (in addition to what is already in the A+B) will cause an issue with the uptake of other elements.
I find the first few weeks of flowering to be the most difficult in coco. My approach during the stretch period is to run a much more balanced 1-1-1 (or a 2-2-3) and to watch my runoff EC very closely.
In addition, with regards to the Canna nutrient schedule, you should be running the 0-2-1 Cannazym at full strength right now to help balance out the PK ratios. This ratio fixer is a critical component of the Canna system.
My suggestion to you is this:
The next time you water feed mix up a solution of just the A+B at exactly 1.0ec. When you feed I want you to collect maybe 1-2L of runoff and test the EC. If it is over 1.3ec that means you're washing out a lot of excess. That means you need to continue rinsing your media with the 1.0ec solution until the deviance between what is going in and what is coming out is within 30% (or 1.0 in and <1.3 out)
Going forward into weeks 3 and 4 this will help ensure you have a clean media that still has its high CEC and complete Calcium buffer. After the 1.0EC "rinsing" then you can incorporate your Cannazym or other high phosphorus supplement to balance out the ratios.
But if you take anything away from this post I want it to be the diligence required of new Coco growers to runoff and testing of that runoff. It doesn't matter what strength solution you are using if the runoff is over 3.0EC. Gotta rinse, never flush, and hit week 3 of flowering ready to be pushed.
thats not a happy looking plant 0.O.premature orange hairs blistery stunted, pretty much no bud growth
yellowing new growth early in flower, mag defciency?
Hello farmers. A little help here would be appreciated..
Got some serious yellowing of new growth a week into flower. Strains Albert Walker and Chemdog #4. Things looked pretty good in veg, started yellowing soon after switch to 12-12. Albert Walker exhibiting strong interveinal chlorosis / yellowing, primarliy in new growth. Chemdog #4 showing signs of mag deficiency below, with some strange yellow splotchiness up top as well. Not sure if mag deficiency could explain the yellowing new growth issues, as all I've read suggests that this deficiency effects older growth.
Growing in coco , DTW, Canna coco and nutes at recommended levels, and 5mL/gal Calmag with every watering (EC ~1.6 now, pH always 5.8-5.9, meters calibrated). I'm in a sealed room, environment is great. Using 1000w hortilux hps.
Any insights are welcomed, thanks y'all
Max
Al Walker
Chemdog #4
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