How Little PPM can they handle?

[ClemSP]

Hi everyone!

So here I have three apparently healthy looking plants: 1 Critical Orange Punch, a little older than the other two Silver Haze.

I just noticed some burnt leaves tips on the bigger one but I’m guessing it’s more due to a light burn rather than over feeding her (lower/less exposed leaves are fine).

And this leads to my question: how little nutrients is too little when a plant seems fine like these?

I haven’t feed them more than 600ppm so far. Normally around 580. A couple of times a week.

Since I’ve read people using twice that amount, I am wondering if there is something I am not optimising here, or if people feeding over 1000 ppm actually do it only once a week, which would essentially be the same a twice 500ppm?

They are completing their third week of 12-12 today. The Silver Haze are just beginning to
Show pistils now, but I’ve read that they are a slow blooming strain, so not overly worried yet.


These are the plants I posted on another thread here, I intended to switch from organomineral to 100% organic for the flowering phase. But I Chickened out and ended up continuing with the organomineral…. So no update regarding this.

Thanks for your help and a good Sunday to all!

 

[ClemSP]

Didn’t find how to edit… but i meant to add that they are growing in a peat/perlite mix 50/50.

 

[WinJr63]

Try adding a little more potassium, keeping eye on leaf tips staying green and runoff ph.

 

[Ninjadogma]

Hi everyone!

So here I have three apparently healthy looking plants: 1 Critical Orange Punch, a little older than the other two Silver Haze.

I just noticed some burnt leaves tips on the bigger one but I’m guessing it’s more due to a light burn rather than over feeding her (lower/less exposed leaves are fine).

And this leads to my question: how little nutrients is too little when a plant seems fine like these?

I haven’t feed them more than 600ppm so far. Normally around 580. A couple of times a week.

Since I’ve read people using twice that amount, I am wondering if there is something I am not optimising here, or if people feeding over 1000 ppm actually do it only once a week, which would essentially be the same a twice 500ppm?

They are completing their third week of 12-12 today. The Silver Haze are just beginning to
Show pistils now, but I’ve read that they are a slow blooming strain, so not overly worried yet.


These are the plants I posted on another thread here, I intended to switch from organomineral to 100% organic for the flowering phase. But I Chickened out and ended up continuing with the organomineral…. So no update regarding this.

Thanks for your help and a good Sunday to all!View attachment 2684238View attachment 2684239View attachment 2684240

The numbers aren't "perfect" but are close enough to it that this simple memorization can help you with future reference: 2-4-6-8.

2-4-6-8 with nutrients:
Seedlings and youngest plants 200
Young plants before maturity 400
Plants at maturity 600
Plants going into flower 800
The highest value the plant should ever see in normal conditions is 1250ppm and that's a very brief period when the plant hits peak flowering around week 6-7.

2-4-6-8 with LED Lighting
Seedlings 200 umols
Immature plants 400 umols
Mature plats 600 umols
Flowering plants 800 umols

So any time you wonder where your numbers should be, you can look at the plant stage and ask yourself if it's a 2,4,6 or 8.