The Week 4 Of Flower, The Troubles

[TankHankerous]

700 ppfd at the canopy- LED lights, promix, maxigrow/maxibloom/calmag. Starting water is <100 ppm before adding calmag. Also recently been giving another 50-100 more ppm of epsom salt on top of the approx 200ppm of calmag.

Here are some pictures of what I assumed was a magnesium deficiency. Also Input PH is approx 5.8 and runoff is around 6.1.

These yellow leaf deficiencies are only toward the top of the plant, I'm all out of ideas.

 

[HydoDan]

I'm thinking too much mag has locked out calcium and potash..

 

[TankHankerous]

Here are a couple pics I just snapped before lights on. My plan as of now is to water tomorrow with 250 ppm of calmag and around 350 ppm worth of maxibloom until my runoff reads around 600-800 ppm and see how that goes. I'm hoping to resolve any lockout issues with this strategy.

 

[cannabiscrusader]

You already have about 100ppm cal/mag in the maxibloom. Combined with the Epsom salts, cal/mag, and probable cal in your starting water, I would cut the cal/mag. Give them plain water next feed

 

[TankHankerous]

You already have about 100ppm cal/mag in the maxibloom. Combined with the Epsom salts, cal/mag, and probable cal in your starting water, I would cut the cal/mag. Give them plain water next feed

Wow hey I didn't know the ppm value of cal/mag in the maxibloom, that's good to know. I've been trying to find a calculator for stuff like this but also I suck at math, HA!

My starting tap water is less than 100 ppm, its practically RO. Am I on the right path with supplementing cal/mag to make my starting water before nutes approx 200 ppm?

One idea I had was that maybe they want even more calcium and magnesium, like maybe 300 ppm and maybe 3-400 ppm of maxibloom. I just don't know. if Maxibloom is locking out Calcium or if Calcium is in deficiency. Or hell maybe it has something to do with Magnesium!

PH of the medium is on point as far as I know- 5.8 in 6.0 out.

I had a question regarding runoff ppm. Are old nutrient salts that aren't used up immediately able to be used by the plant later on if not watered out?

For example, do the cal/mag nute salts in the medium from 2 days ago still feed the plant on the following watering (once the salts get hydrated again) assuming they all don't get flushed out with "plain water" which for me is (<100 ppm)?

Thanks for taking the time to help me set my sails to a brighter pasture

 

[cannabiscrusader]

They are definitely getting too much. I'd say your starting water and the maxibloom is close to optimum. Adding epsom salts once a week should be fine, but read the plant first. I know it looks like it's needing mag, but it's because cal is blocking it out. It won't all flush out with plain water, but the goal is to let the plant use what you gave it to bring everything back to acceptable levels.

Look at the chart thing @HydoDan posted. That will tell you what nutrients effect each other in your mix.

 

[TankHankerous]

Thanks again cc. I'll be sure to update after tomorrow's watering

 

[Bud man 43]

I like PH at 6.2 in flower-

 

[TankHankerous]

Thanks, does that include in "soilless medium" peat moss, drain to waste type deal?

 

[Bud man 43]

Thanks, does that include in "soilless medium" peat moss, drain to waste type deal?

Definitely
5.8 early veg
6.0 transition
6.2 in flower

 

[TankHankerous]

Good shit Bud man 43, fuck it I'm swingin' her to 6.0 off the input

 

[TankHankerous]

Lemme ask you this: as a promix grower, whar's the solution?

 

[TankHankerous]

I figured jazzin my ppm to 200ppm calmag (and nutes) total ppm in 900... shoulda kepte her at 6 or 7

 

[TankHankerous]

final oh in was 5.8 because I'm running promix.... I hear 6.5 to 5.8, this nigger can't catch a break!