Enter the Wu

[2-Scoops]

Turn the auto valve off for that one plant, then sling a litre or two of water through it and dip what comes out bottom in tray/rezz and if the run off is summink like way over 3.0ec it could well be lockout caused from medium being over saturated with fert salts, then maybe just water in through top of a really low ec for a week or so and it should drop you could then turn valve back on, either that or you could just really lower ec of your ferts in tank for a week till plants use what in pots, cus if ones high rest are gonna be high so you can bet others are. But if not over 3.0ec i doubt very much its lockout caused by that so just turn valve back on.

Your ec of 1.4 is that just fert ec or water and fert together ? Basically what's your water ec is it hard or soft water cus if its hard lets say 0.6 ec and your only giving 1.4ec total then yes your prolly under-ferting plants cus in reality that would only be 0.8 fert ec if you take away a hard water ec of 0.6. I hope that bit makes some sort of sense cus im shit getting point across at times.

No need to do the dipping of run off thing if its summink like the hard water scenario above, just up ferts as you planned originally.

On another note it may well be a fussy coont and it could possibly be summink like soggy rootage and if that's case maybe let it dry out 3 to 4 days.

TBH Wu im just giving you possible things it might be here cus it dont look that bad from here . Anyhow just a few things you could try out to get to bottom of the problem their mate is all.

[wutang]

Thanks my brother @2-Scoops always valued mate. I've had too many gaps in between grows but hopefully now I'm on the coco journey I can begin to dial in better.

It's 1.4ec total. My water ec is 0.4 I think - ill double check later. I've only topped up a bucket full..20l..so I will top up if the others start looking hungry.

I need to get some more inline valves to isolate individual pots for sure

Hope you're good tho mate.

[wutang]

@2-Scoops got the ec wrong. Straight out of tap is 0.6..and my total ec after adding a and b and pk13/14 is 1.4. Should I top it up or should I see how it goes for a few days?

My ec has been 1.8 to 2.0 after adding nutes? So should I increase then? I'm a bit baffled now lol

Here's photos of the weird one..you can see it progressing although buds are fattening up

[2-Scoops]

My ec has been 1.8 to 2.0 after adding nutes? So should I increase then? I'm a bit baffled now lol

Stick at 1.8 to 2.0ec in total then if your water is so hard. Maybe go straight with just A&B for a week or two to green it up a wee bit, cus adding pk boost to that total ec will reduce base ferts a bit and i think its that whats needed personally speaking to green the little fucker up. You should be good at that and tbh their should be no need to ever go over 1.8-2.0 ec total for a fully grown plant in bloom like these.

Its not gonna be lockout caused by saturation of your medium with ferts salts at doses your using with your hard water or i should say i doubt very much its lockout

Were you feeding less for a bit by any chance ? Cus first 3 to 4 weeks of bloom, they are at hungriest and you could always up it a wee bit so long as you drop it back after stretch has slowed. End of shift 2.5ml a litre of A&B works great first 4 weeks of bloom before dropping back to 2ml of A&B right to chop and pk boost 0.5ml a litre i use it last 3 weeks before i put plants on water for 2 weeks then chop. Thats if ya dont wanna fuck about with EC pens obviously.

[wutang]

My ec has been 1.8 to 2.0 after adding nutes? So should I increase then? I'm a bit baffled now lol

Stick at 1.8 to 2.0ec in total then if your water is so hard. Maybe go straight with just A&B for a week or two to green it up a wee bit, cus adding pk boost to that total ec will reduce base ferts a bit and i think its that whats needed personally speaking to green the little fucker up. You should be good at that and tbh their should be no need to ever go over 1.8-2.0 ec total for a fully grown plant in bloom like these.

Its not gonna be lockout caused by saturation of your medium with ferts salts at doses your using with your hard water or i should say i doubt very much its lockout

Were you feeding less for a bit by any chance ? Cus first 3 to 4 weeks of bloom, they are at hungriest and you could always up it a wee bit so long as you drop it back after stretch has slowed. End of shift 2.5ml a litre of A&B works great first 4 weeks of bloom before dropping back to 2ml of A&B right to chop and pk boost 0.5ml a litre i use it last 3 weeks before i put plants on water for 2 weeks then chop. Thats if ya dont wanna fuck about with EC pens obviously.

Thanks buddy. I'll top the tank up in a couple of days. It will be good to see how they react to lower dosage. This is the best I've progressed since I've started growing so it's all learning for me bro. Hope you're bless and thanks for your help. Peace bro

[wutang]

Yesterday's update. They haven't drank much yet, so my understanding is that even though the feed is currently at 1.4ec they will try and make use of what's currently in the plant anyway.

[wutang]

So I've topped up the res

I made the nutrient solution higher to compensate for about the 7 or so litres still left in the tank at 1.4ec

20l bucket:
80ml a
80ml b
30ml pk13/14
EC total: 2.1
Ph 5.7

After mixing in with solution in res:
Ec: 1.9
Ph: 5.8

Definitely a lock out of deficiency. I noticed another plant going slightly yellow after the weak nutrient top up the other day. It's soo quick how things change in coco..vs soil. Hopefully quick to correct. Fingers crossed for me canna gods please

Is this a calmag deficiency?

[Herbalist]

Looks similar to mine
Im assuming mine is a calcium deficiency based on this.......https://www.growweedeasy.com/cannabis-symptoms-pictures
Hope it helps in pinpointing your issue. I cant give any suggestions for fixing as i know pretty much zero about coco.

[wutang]

Cheers brother. Very similar to mine!

[Invisible Sun]

I'd say you've got an advanced iron deficiency. IV experienced it twice , starts with yellowing of new growth creeping down the plant.

Sequester seaweed with Iron works a treat