Rust spots approx 5 wks

[idiopathic neuropathy]

Yesterday all looked healthy.
Woke up this morning looked at plants all appear healthy EXCEPT Dinafem Industrial. The other 3 plants show no signs! All 4 plants habe been treated the same.
A few Rust spots on top of lower fan leaves and some on top near flowers. No signs on the bottom side of leaves.
Last feeding was : tap water tds prior to nutes 125
1.5/galcal mag+
2.0/gh micro
2.5/gh gro
2.5/gh bloom
Ph/5.9
10-15% runoff
LED 900W 33" above canapy 20/4.
100% coco temp 76-81 rh 50-60
Approx 5 wks old
Any ideas? Phos.def ? Calmag def ? Ph ?
P.S. trouble upload pics later...power outage. .on generator cell towers slow...had blizzard

 

[Unique]

Yesterday all looked healthy.
Woke up this morning looked at plants all appear healthy EXCEPT Dinafem Industrial. The other 3 plants show no signs! All 4 plants habe been treated the same.
A few Rust spots on top of lower fan leaves and some on top near flowers. No signs on the bottom side of leaves.
Last feeding was : tap water tds prior to nutes 125
1.5/galcal mag+
2.0/gh micro
2.5/gh gro
2.5/gh bloom
Ph/5.9
10-15% runoff
LED 900W 33" above canapy 20/4.
100% coco temp 76-81 rh 50-60
Approx 5 wks old
Any ideas? Phos.def ? Calmag def ? Ph ?
P.S. trouble upload pics later...power outage. .on generator cell towers slow...had blizzardView attachment 877379

I think you need bump calmag up, I see reddish stems and with them brown spots, seems like clear sign of calmag def.. bump up to 2ml if not clear up stems then bump up to 2.5ml and see how that goes. Being under led & running auto's will require more calmag then your currently given.

 

[namvet25]

Are these nutes organic or floro series? and what are the recommended dosages?I would raise your cal/mag to 5ml per gal during flowering.

 

[idiopathic neuropathy]

Floro series at approx 1/2 of their recommendations....tds last 2 feedings tds 525
I thought it might be calmag def. From pics on web
Is it ok to ph 5.9 and calmag up without nutes even though they are not due for a feeding for another 12 hours?
Sorry cant upload pics cell towers are loaded

 

[idiopathic neuropathy]

Here lower leaf

 

[namvet25]

Floro series at approx 1/2 of their recommendations....tds last 2 feedings tds 525
I thought it might be calmag def. From pics on web
Is it ok to ph 5.9 and calmag up without nutes even though they are not due for a feeding for another 12 hours?
Sorry cant upload pics cell towers are loaded

Just wait until you feed than add cal/mag 1tsp gal and ph it after you add everything.

 

[Waira]

Ca defc. mate, likely just lack of,.. it's a poorly-immobile nute element, so typically shows up higher on the plant, especially under LED,... looks like you know coco well enough, with the more or less proper run-off amounts (more for you maybe, my guru says 15-20% depending on water source),...I suggest taking a TDS/EC reading of your usual feeds, and then check the run-off ppm/EC; that shouldn't be more than200-250ppm higher than input, ph should be close too,... let us know,... I want to make sure this isn't a salt build-up issue, making it difficult for the plant to uptake the Ca,... as you likely know, coco is a major Ca hog, needs to have it's CEC sated with it before it's starts to give and take more readily,... Mg too, but to a lesser extent,...
.... lets see what your run-off tells us before you elevate Ca-mg inputs,....

 

[idiopathic neuropathy]

Ca defc. mate, likely just lack of,.. it's a poorly-immobile nute element, so typically shows up higher on the plant, especially under LED,... looks like you know coco well enough, with the more or less proper run-off amounts (more for you maybe, my guru says 15-20% depending on water source),...I suggest taking a TDS/EC reading of your usual feeds, and then check the run-off ppm/EC; that shouldn't be more than200-250ppm higher than input, ph should be close too,... let us know,... I want to make sure this isn't a salt build-up issue, making it difficult for the plant to uptake the Ca,... as you likely know, coco is a major Ca hog, needs to have it's CEC sated with it before it's starts to give and take more readily,... Mg too, but to a lesser extent,...
.... lets see what your run-off tells us before you elevate Ca-mg inputs,....

Thank you Waira for your time and taking interest.
My knowledge of growing comes from reading and being here on AFN.
As you know, there are conflicting opinions on growing and have discovered they are more frequent growing in coco.
Approxiamately twice a week, i have been checking tdc values as well as ph of my runoff. All plants have shown lower tdc values approxiametly half of the values than prior values. Also, ph runoff shows in the 5.8-6.0 range. So, it doesnt appear that it is "lockout" related. However, I have read to take runoff from coco as a "guide" and not a "true" indicator based on what I have read from more experienced growers. More importantly, I am always interested in learning and always open to others points of views and their experiences.
Your further comments/experiences are appreciated. Peace.

 

[Waira]

:smoking: quite welcome mate!
... check out CANNA's website, it's loaded with good stuff,.. takes some poking around to find it, but they can offer lots of good info,...
.... I'm learning too man, by proxy- I'm a soil guy mainly, but when I can I'll dive in coco with Autopots.... meantime I have to learn enough to help here, as coco is a popular medium these days,.. [HASHTAG]#1[/HASHTAG] problem is folks trying to treat it like true soil or even soilless peat-based mediums...
... if your run-off is OK for ppm's, pH too, then I'd up the Ca-Mg a bit, maybe do a foliar spray with your Ca-Mg product! Do you have some wetting agent (also a must for growing IMO, especially in coco).... foliar is hands down the fastest way into the plant, and it bypasses any troubles in the root zone,... have you done foliars before? the wetting agent takes the surface tension out of the solution you spray, allowing it to coat and stick better instead of just beading up,.. spray undersides of leaves in particular, more stomata there,... basically, the more surface area exposed, the more absorbed! If you want the max. kick-butt way to work foliar, use Optic Foliars Transport along with whatever you add for treatments... no wetting agent needed, this stuff allows temporary penetration through the leaf cuticle so stuff goes right into the machinery!