High EC feeding…

[lusidghost]

This really has nothing to do with EC, but I thought it was interesting. This was from painters tape covering a branch. I’ve seen the debate that LEDs “bleach” branches purple vs LEDs cause a deficiency that turns the branches purple.

 

[Samwell Seed Well]

i think we just need to get rid of the ppm measurement and run off ec.

Indeed

This really has nothing to do with EC, but I thought it was interesting. This was from painters tape covering a branch. I’ve seen the debate that LEDs “bleach” branches purple vs LEDs cause a deficiency that turns the branches purple.
View attachment 5097115

Wow looks off bet the bud tasted bad and burnt black. /s

 

[twentyeight.threefive]

This really has nothing to do with EC, but I thought it was interesting. This was from painters tape covering a branch. I’ve seen the debate that LEDs “bleach” branches purple vs LEDs cause a deficiency that turns the branches purple.
View attachment 5097115

Definitely a localized deficiency.

 

[lusidghost]

I clicked on the wrong picture. The one I meant to post was focused on the branch. But whatever, I just wanted to note that my picture taking skills aren't that bad.

 

[PJ Diaz]

Yes but within levels roots regulate all uptake in many ways, it was just to answer why one can run lower or higher and get the same results not to say overfeeding will work well.

It seemed that was the case here, some run lower some higher.

In your previous example, the plant was basically shutting itself down due to semi-toxic levels of salts. That doesn't get you the "same results" at the end of the day. It gets you a less healthy plant, albeit perhaps productive nonetheless.

 

[PJ Diaz]

This simply isn't true.

To play devil's advocate, it could be true due to higher photon output with LED vs HPS of the same wattage, therefore the plant could potentially use a higher EC, if all other factors were also already at optimum.

 

[PJ Diaz]

But the real question is, can someone taste the difference between 2ec and 3ec?

Be a cool thing to set up some friends and do a blind taste test.

Most people can't taste subtle differences in general at all. A small % of the population can smell/taste much better than everyone else. People with big noses.

 

[Milky Weed]

Most people can't taste subtle differences in general at all. A small % of the population can smell/taste much better than everyone else. People with big noses.

Hahahaha. Ive always wondered if im a super taster, i can usually taste things others dont notice.

I cannot stand the taste of alcohol, no matter how hard i tried. So bitter.

 

[lusidghost]

In your previous example, the plant was basically shutting itself down due to semi-toxic levels of salts. That doesn't get you the "same results" at the end of the day. It gets you a less healthy plant, albeit perhaps productive nonetheless.

This reminded me. I ordered a syringe to pull solution out of my rockwool to check the EC. The mailman just dropped it off about an hour ago, so I'll try it this evening. Thanks for the recommendation. (I'm pretty sure it was you, although I may be mistaken.)

 

[xtsho]

I don't understand the logic behind "Pushing your plants". Keeping them healthy and stress free seems better. Over fertilization induced stress caused by pushing them to "the limit" is not going to yield higher quality or significantly higher yields. It can lead to decreased yields and substrate issues.

Over-Fertilization of Potted Plants

Over-fertilization of commercial pot or container-grown crops results in high concentrations of soluble salts in the potting medium.

extension.psu.edu

 

[twentyeight.threefive]

To play devil's advocate, it could be true due to higher photon output with LED vs HPS of the same wattage, therefore the plant could potentially use a higher EC, if all other factors were also already at optimum.

He's indicated that he needs to run more than DOUBLE the EC under LED. EC is exponential so 1.0 EC - 1.4 EC to 3.0 EC under LED wouldn't make up for any increase in photon output. He didn't say it was runs from the same clone, so if it wasn't the whole argument is invalid anyways.

 

[Gregshed]

In your previous example, the plant was basically shutting itself down due to semi-toxic levels of salts. That doesn't get you the "same results" at the end of the day. It gets you a less healthy plant, albeit perhaps productive nonetheless.

Not really, below semi toxic it altered roots to accept more so the opposite of what your saying.

I'm not talking about toxicity but we'll below that. Certain nutrients will also regulate the rest.

 

[Gregshed]

I felt the main question was

- How high ec can we go and how is one at 1.2ec achieving the same as another at 2.4ec.

 

[twentyeight.threefive]

I felt the main question was

- How high ec can we go and how is one at 1.2ec achieving the same as another at 2.4ec.

Maximum EC is dependent on multiple factors. In a high transpiration system 2.4 EC could burn the plants up and 1.2 EC could lead to deficiencies. It's also dependant on PPFD and CO2 supplementation.

You can't just say a plants max EC is "x" without quantifying the additional required parameters.

 

[Billy the Mountain]

He's indicated that he needs to run more than DOUBLE the EC under LED. EC is exponential so 1.0 EC - 1.4 EC to 3.0 EC under LED wouldn't make up for any increase in photon output. He didn't say it was runs from the same clone, so if it wasn't the whole argument is invalid anyways.

No, EC is linear. E.g. add double the salt, the EC doubles

 

[Kassiopeija]

yeah it's pH that is log

 

[Kassiopeija]

To play devil's advocate, it could be true due to higher photon output with LED vs HPS of the same wattage, therefore the plant could potentially use a higher EC, if all other factors were also already at optimum.

it's also that HPS increases leaf temps so they transpire more

 

[twentyeight.threefive]

No, EC is linear. E.g. add double the salt, the EC doubles

Thanks for the correction, as @Kassiopeija pointed out it was pH that I was thinking of.

 

[Gregshed]

Maximum EC is dependent on multiple factors. In a high transpiration system 2.4 EC could burn the plants up and 1.2 EC could lead to deficiencies. It's also dependant on PPFD and CO2 supplementation.

You can't just say a plants max EC is "x" without quantifying the additional required parameters.

Think your deliberately missing my point whilst I'm agreeing with yours.

 

[PJ Diaz]

He's indicated that he needs to run more than DOUBLE the EC under LED. EC is exponential so 1.0 EC - 1.4 EC to 3.0 EC under LED wouldn't make up for any increase in photon output. He didn't say it was runs from the same clone, so if it wasn't the whole argument is invalid anyways.

You're right, that is too extreme. I didn't look at the details. I could see going from 1.4 EC to 2.0 EC though.