Getting Freaky With Mars Hydro And The FC3000

[Zephyrs]

Is this a toxicity? We did have a few cold nights this week (~7C) but is it odd to only see purpling of the tips?
I mixed a bucket of MC at max strength and didn't end up using it for 2 days... could be that too lol.
I think the orange speckle looking issue is from a while back. But any tips on the purple tips?

Humm!? That doesn't look like normal Anthocyanin hormone flow from colder temps. Reason being is the whole leaf/leaves would purple evenly upon the onset of colder temps. Not just The Tip of one blade of a few leaves. That is an interesting problem that I'm not accustomed to. BUT, then again I don't use MC. I Betcha Our Hydro buddies would know more than me, who is an LOS guy only.

Either way @Regrowth... Your Ladies Look Fantastic

 

[DV8]

Hey fella.

Cheers for the NameGate update LOL!

Loving this grow.

That Purpling looks dubious, but I think its a temp issue personally.

I say that based on two things.

Leaf temps usually 2C below air temp, so sub 10C can really be counted lower. Thats not just canna, its a pretty good general rule.

Secondly, I notice like the ring effect. Like there is a circle of cold air around it, just affecting the outer tips. The further those fans entered that low zone without foliage buffer the worse the damage. Like lower and outer is most affected.

If its on the lower outer fans only, which it looks like, then temps is cause, drawing in air too cold from the outer and having no insulating protection.

If its tops and inners as well you may need to chase further options like nutes.

But from pics its temps. Those cells got too low in temp and denigrated, corrupted the colour.

Just my 2cents.

Have a look and see if that reasonably explains what you are seeing.

 

[Zephyrs]

Hey fella.

Cheers for the NameGate update LOL!

Loving this grow.

That Purpling looks dubious, but I think its a temp issue personally.

I say that based on two things.

Leaf temps usually 2C below air temp, so sub 10C can really be counted lower. Thats not just canna, its a pretty good general rule.

Secondly, I notice like the ring effect. Like there is a circle of cold air around it, just affecting the outer tips. The further those fans entered that low zone without foliage buffer the worse the damage. Like lower and outer is most affected.

If its on the lower outer fans only, which it looks like, then temps is cause, drawing in air too cold from the outer and having no insulating protection.

If its tops and inners as well you may need to chase further options like nutes.

But from pics its temps. Those cells got too low in temp and denigrated, corrupted the colour.

Just my 2cents.

Have a look and see if that reasonably explains what you are seeing.

That's an interesting point that you make!.. Please Elaborate for Us that aren't as knowledgeable. Sorry not trying to hijack, just curious, that's all??

 

[Regrowth]

Thanks guys. I just did a bit of searching but I'm not confident making a diagnosis.
It could indeed just be the cold nights, DV.
The second picture is a bit hard to read but I can spot the word purple a few times.
Phosphorus and Sulfur. Occasionally Molybdenum issues.

 

[InTheShed]

We did have a few cold nights this week (~7C)

Inside the tent?

 

[Regrowth]

Not entirely sure.
Would've been a few degrees above that inside the shed. It's unheated and not well insulated.
But maybe 10c at the lowest?

 

[Regrowth]

Meanwhile was 30c in the tent today. Raised the light a bit because I noticed a bit of heat stress.

 

[InTheShed]

10C is pretty cold for a cannabis plant used to indoor living! -7C is absolutely crazy!

And those are some wild temp swings.

 

[Regrowth]

no that was a ~ not a - shed lol.
funny that it got changed to - in the quotes. seems like a bug.

 

[InTheShed]

Oh okay, but even so, 10C is 50F and a lot of nutrient uptake stops down there.

"low temperatures will detrimentally affect the root system and the uptake of nutrients, particularly in the case of magnesium. This micro-nutrient is vital for the proper development of the cannabis plant and if the substrate is colder than 18ºC then this element is most likely not being absorbed by the plant."
The effect of cold on cannabis plants

 

[Regrowth]

There's a stove in there. Guess I'll be building some fires if it gets cold again.

 

[Costanza]

I agree its most likely the temp but, could it be possible nutrient splash? usually it causes lighter colored blotches but its weird how its only on certain spots and not on all leaves

 

[Regrowth]

I agree its most likely the temp but, could it be possible nutrient splash? usually it causes lighter colored blotches but its weird how its only on certain spots and not on all leaves

I think it's too high up on the one plant for it to be a nutrient splash tbh.

 

[Bill284]

I think it's too high up on the one plant for it to be a nutrient splash tbh.

Good morning @Regrowth apologies for being late.
I had 11c the same night probably as you.
Didn't effect any leaves.
So 10 shouldn't be a problem.
More than likely something they ate.
You mentioned old nutrients.
I know when the salts fall out of mine the pH goes out of wack.
You in soil?




Stay safe
Bill284

 

[Regrowth]

Good morning @Regrowth apologies for being late.
I had 11c the same night probably as you.
Didn't effect any leaves.
So 10 shouldn't be a problem.
More than likely something they ate.
You mentioned old nutrients.
I know when the salts fall out of mine the pH goes out of wack.
You in soil?




Stay safe
Bill284

That's the one thing I hate with the MC, you mix a batch and by the next morning all the salts are just sitting there at the bottom of the bucket. I give things a good stir before feeding but there's always a chance that they get fed a little stronger than desired. I don't pH my nutrients, I don't have my meter with me and it's definitely uncalibrated by now so I don't really know how bad it's getting. I think I'll bump the MC down a bit just incase and water with a good run off. ATM I'm basically giving them the maximum for flower of 1.59/L, which I don't usually do tbh. and it's probably a bit unnecessary. I'm growing in Promix HP, the peat version. Thanks, Bill.

 

[Chuckeye]

That's the one thing I hate with the MC, you mix a batch and by the next morning all the salts are just sitting there at the bottom of the bucket. I give things a good stir before feeding but there's always a chance that they get fed a little stronger than desired. I don't pH my nutrients, I don't have my meter with me and it's definitely uncalibrated by now so I don't really know how bad it's getting. I think I'll bump the MC down a bit just incase and water with a good run off. ATM I'm basically giving them the maximum for flower of 1.59/L, which I don't usually do tbh. and it's probably a bit unnecessary. I'm growing in Promix HP, the peat version. Thanks, Bill.

FWIW > I'm in ProMix HP, first week of flower (total of 57 days) and I'm @ 4g/4L and just thinking about a small bump up...

Cheers

 

[Regrowth]

That's a little low I think. Lots of room to go up from there. I veg at 1.2g/L.
I'm always afraid when I get to the max bloom strength though. I've always backed down a bit around now.
But either way, I usually have a plant or two that's unhappy near the end of the bloom cycle.

 

[Chuckeye]

Does this look like she needs more ?

Cheers

 

[Regrowth]

Does this look like she needs more ?

Cheers

Looks happy and healthy to me. I guess sometimes less is more.

 

[Bill284]

That's the one thing I hate with the MC, you mix a batch and by the next morning all the salts are just sitting there at the bottom of the bucket. I give things a good stir before feeding but there's always a chance that they get fed a little stronger than desired. I don't pH my nutrients, I don't have my meter with me and it's definitely uncalibrated by now so I don't really know how bad it's getting. I think I'll bump the MC down a bit just incase and water with a good run off. ATM I'm basically giving them the maximum for flower of 1.59/L, which I don't usually do tbh. and it's probably a bit unnecessary. I'm growing in Promix HP, the peat version. Thanks, Bill.

There is your answer.
Promix has is hydroponic.
Same as coco it should be fed at 5.8 ph.
Feed, water, feed water, every day in promix.
Do you use calmag?
I'm running coco in the greenhouse without a ph pen
It's not perfect but can be done, nutrient line helps.
Remo have been fantastic.
If your water fluctuates from the tap you can get issues as it swings.
Unfortunately the best thing to do if your running promix is to set the ph before feeding.
But I'm getting away with it so far so what do I know?
Hope your enjoying your weekend my friend.




Stay safe
Bill284