K deficiency?

[Stephen.zonk]

Hello fellow rollers !

Just to be sure if I diagnose it correctly.
Is it K deficiency ? (and maybe some Mg?)


Lights - 150 cob led
Temps - Day 80 F, Night 70 F Humidity 50%/70%
Medium - 2 gal pot, Organic Soil Light mix biobizz
Nutes - Biotabs + Biobizz
Water - tap water 200ppm
Ph - watering ph 6.5 - 7, didn't check how much it have after geting out from soil
Light cycle 18/6
Strain Northern Lights + AutoBoom

 

[hotrodharley]

200 PPM of what?

 

[Roger A. Shrubber]

i don't think it's K, you get browning on the leaf edge and yellowing along the margin with K deficiency.
it looks like ph damage, but its not in the right places....

 

[NaturalFarmer]

Any magnesium in what you are feeding them?

 

[Stephen.zonk]

200 PPM of what?

200 PPM of minerals in tap water.

Any magnesium in what you are feeding them?

dolomite lime in soil, cal-mag in spray

i don't think it's K, you get browning on the leaf edge and yellowing along the margin with K deficiency.
it looks like ph damage, but its not in the right places....

just checked outflow water - Ph 6.8

 

[hotrodharley]

Uh . . . on that 200. What makes up that 200? I know minerals eh? Like exactly which ones?

 

[hotrodharley]

i don't think it's K, you get browning on the leaf edge and yellowing along the margin with K deficiency.
it looks like ph damage, but its not in the right places....

pH and excess calcium causing lockout. 200 PPM is probably mostly calcium then he's adding it twice

 

[Stephen.zonk]

Well I don't know which minerals..... I put tds meter into tap water and that's the result

 

[Roger A. Shrubber]

most of the time about 75% of whats in tap water will be calcium, in the form of carbonate with other minerals. at 200 ppm, you should not need to use anything like cal mag

 

[JohnDee]

Well I don't know which minerals..... I put tds meter into tap water and that's the result

You can get a water report from whoever supplies your water (city/county). Often it's posted online. Though Shrubber's comment is right on.

So HotRodHarley strikes again...you're double dosing Ca++ causing lockout. Do a flush, restart nutes after a few days at half strength without the calmag. And FYI...the Biobizz you are using is not an organic soil. It's a substrate that needs to be fed regularly. No nutritional value...similar to coco.
JD

 

[AnimalMother1974]

most of the time about 75% of whats in tap water will be calcium, in the form of carbonate with other minerals. at 200 ppm, you should not need to use anything like cal mag

If you do have an excessive build up of calcium carbonate in the soil, how do you get rid of it?

 

[JohnDee]

If you do have an excessive build up of calcium carbonate in the soil, how do you get rid of it?

If you added too much and it's making ph too high...I'd suggest a flush. What else? Prevention would be better obviously...
JD

 

[Roger A. Shrubber]

If you do have an excessive build up of calcium carbonate in the soil, how do you get rid of it?

on a farm you would treat the field with sodium acetate, not sure about in containers, might be a little rough on the roots unless you washed it out quickly. i'd say a good flush ought to take it down to levels where it isn't causing lockouts, anyway

 

[AnimalMother1974]

on a farm you would treat the field with sodium acetate, not sure about in containers, might be a little rough on the roots unless you washed it out quickly. i'd say a good flush ought to take it down to levels where it isn't causing lockouts, anyway

Nah to sodium product. I probably need to transplant into new soil with less perlite so it wont dry out so fast and less calcium loaded tap water will be required. My plants in the California heat so far this year needed to be watered 3-5 times a week and this high calcium build up is causing other deficiencies, mainly mag and potassium. Too much perlite , my soils dry out waaaay to quick.

 

[Roger A. Shrubber]

Nah to sodium product. I probably need to transplant into new soil with less perlite so it wont dry out so fast and less calcium loaded tap water will be required. My plants in the California heat so far this year needed to be watered 3-5 times a week and this high calcium build up is causing other deficiencies, mainly mag and potassium. Too much perlite , my soils dry out waaaay to quick.

try mulching, maybe with some alfalfa straw, will slow down evaporation losses. if you're going to transplant, maybe add in a little coco or peat to your medium to hold water a little longer?