mjlifestyle
Member
Hi all,
I asked about this issue I'm having in my grow journal as well, but I'd like to address is here too, in the dedicated Infirmary section. To be fair, I did get a helpful suggestion from corky, which I am following right now (back off on feeding a bit, basically), but I would really like to hear some other opinions in order to identify/understand the issue better in the future.
I'm growing one Malawi and two Zamaldelicas from ACE in coco+perlite, which have been flipped 10 days ago, after vegging for 9 weeks. Just to be clear, the 2 Zamaldelicas don't seem to be affected at all, it's just the lone Malawi that has the symptoms (so far, at least).
I'm hand feeding them all once a day with HESI Coco nutes, which has NPK of 3-4-5 and I don't use full dosage (about 3/4 when the issue appeared, after starting at 1/2 ten days ago). Nothing else besides that, except the occasional molasses and silicon shot (1-2 times a week). Temps are between 24 and 28 C (75-82 F) and humidity is between 55% and 65% most of the time.
So here's a couple of shots of one of the top young leafs:
The bad clawing suggests N toxicity, but only the top new leafs are affected. There's no excessive darkening on bottom leafs (although they are a bit on the darker side), but no clawing at all. After checking various sources, I think the other possible option would be Zinc deficiency, which is a bit odd, but the symptoms are there - top young leaves display chlorosis and curl quite badly (check and check), growth tips are kinda bundled together (check), slow upward growth (check, as she's now the smallest of my 3 plants, after being ahead in the first month of veg). On top of that, since N is mobile while Z is not, the newer leaves should display the symptoms first, which is the case here.
I'm not sure what could have caused it, especially if it's a Z def. I've fed them @ pH of about 5.7-6 and apparently Z is best absorbed at slightly lower pH in hydro (<5.5), but then again all 3 plants get the same feeding regimen (same pH, same time & frequency, same concentration). Maybe the Zamaldelicas are a bit more resilient in this regard?
I flushed her with about 2x pot size, with pH water and 1/4 nutes dosage and I'll check how the new growth develops. I've also backed off on the feeding, but since I just started that there's no real feedback on it so far.
Any opinions are more than welcome, especially since N tox and Z def don't have the same fix (past the initial flush).
Cheers!
I asked about this issue I'm having in my grow journal as well, but I'd like to address is here too, in the dedicated Infirmary section. To be fair, I did get a helpful suggestion from corky, which I am following right now (back off on feeding a bit, basically), but I would really like to hear some other opinions in order to identify/understand the issue better in the future.
I'm growing one Malawi and two Zamaldelicas from ACE in coco+perlite, which have been flipped 10 days ago, after vegging for 9 weeks. Just to be clear, the 2 Zamaldelicas don't seem to be affected at all, it's just the lone Malawi that has the symptoms (so far, at least).
I'm hand feeding them all once a day with HESI Coco nutes, which has NPK of 3-4-5 and I don't use full dosage (about 3/4 when the issue appeared, after starting at 1/2 ten days ago). Nothing else besides that, except the occasional molasses and silicon shot (1-2 times a week). Temps are between 24 and 28 C (75-82 F) and humidity is between 55% and 65% most of the time.
So here's a couple of shots of one of the top young leafs:
The bad clawing suggests N toxicity, but only the top new leafs are affected. There's no excessive darkening on bottom leafs (although they are a bit on the darker side), but no clawing at all. After checking various sources, I think the other possible option would be Zinc deficiency, which is a bit odd, but the symptoms are there - top young leaves display chlorosis and curl quite badly (check and check), growth tips are kinda bundled together (check), slow upward growth (check, as she's now the smallest of my 3 plants, after being ahead in the first month of veg). On top of that, since N is mobile while Z is not, the newer leaves should display the symptoms first, which is the case here.
I'm not sure what could have caused it, especially if it's a Z def. I've fed them @ pH of about 5.7-6 and apparently Z is best absorbed at slightly lower pH in hydro (<5.5), but then again all 3 plants get the same feeding regimen (same pH, same time & frequency, same concentration). Maybe the Zamaldelicas are a bit more resilient in this regard?
I flushed her with about 2x pot size, with pH water and 1/4 nutes dosage and I'll check how the new growth develops. I've also backed off on the feeding, but since I just started that there's no real feedback on it so far.
Any opinions are more than welcome, especially since N tox and Z def don't have the same fix (past the initial flush).
Cheers!
