need help with my seedlings

[A-Train]

Oh and a good soil probe like the accurate 8 is advised as run of could be 6.6 but soil ph could be at 5.8?

@GoAuto6

 

[Ross3k]

ah! my bad, I just saw you're using tap water with high ppm's,... what's the unadjusted pH and TDS reading? It looks like you have pretty hard water, meaning there's a lot of dissolves CaCO3 in there, which will drive pH up, and strongly resist pH adjusting down,.. it's the carbonate/CO3 that's involved with the pH buffering mainly,... Your nutes are coco specific right? No extra Ca-Mg going in,...?
I suggest using RO/Di water, or even those self-fill water machines.. these will give very low ppm water, no buffering minerals in there to fight against on pH'ing down,... As for flushing, it can't be done like true soil, or you risk screwing up your coco's CEC balance, or buffering (not pH related),... this has to do with coco;'s powerful affinity to Ca, and Mg to a lesser extent,... it binds it very strongly at first, keeping it from the plant; only after it;s sated does the free give and take start working properly,... if you haven't done some research on coco, then do so mate! here, and Canna 's website too... it's unlike anything else, including other soilless mediums,....
Flushing solutions (if needed) I've seen recommended are: RO/Di water (low ppm machine made water is fine) with 150 ppm total of Ca-Mg, then another 150ppm nutes added in, pH to 6.0.... pour through until run-off is at or near input specs,.... this will "reset" the CEC buffering, and purge extra crap out,...

thanks for that info. Just to clarify my tap water was reading 350 ppm's after i added very small amount of canna start and rhizo for the roots. Usually ppm's are 140-150 out of the tap. Nutes are coco specific, started a little cal-mag today.

Yea i have read up a fair bit about it most opinions are conflicting but Canna's website gave some good info. Feeding/watering, they recommend not reading the run off in the same way you would with soil either, the way the coco holds nutrients etc effects the run off readings to much to use it for any type of info.

I flushed 2 of them (unhealthiest looking ones) but coildnt get the readings all the way down and left the other 2, who looked and are growing great.

Lsd-25 has been the main problem plant, it was super yellow from the moment it broke from seed and has never greened up and now growth has slowed right down other three are storming along so i'm putting it down to the seed or being a little bit more sensitive to my mess ups..

 

[Ross3k]

Any ideas on the pale patches on oldest leaves ?

 

[Rev. Green Genes]

Hi Ross3k

I have seen that before, I think it is a genetic mutation. It won't harm anything, it should grow out normal, even if there are a few spots like that here and there. If I'm wrong, I'm sure we will here what it is from someone else soon.

 

[Ross3k]

Slurry test today showed coco at ph 6.1
5.8 going in so not too bad I think..

Latest pics, strange spots/patches appearing on older leaves 3rd pic

 

[Waira]

Ross, I merged these two threads,.......yeah, this common color break thing again,... not sure what's behind it, but usually it seems to resolve itself and grow fine,....

 

[Ross3k]

plants are still going through the wars, too much food, not enough

@Waira I would've just said too much, because of the burnt tips but the pale-ness/yellowing coming into the leaves before the tip was throwing me off, I thought with too much food the leaf would stay a darker green throughout ?

 

[DABaracuss]

plants are still going through the wars, too much food, not enough

@Waira I would've just said too much, because of the burnt tips but the pale-ness/yellowing coming into the leaves before the tip was throwing me off, I thought with too much food the leaf would stay a darker green throughout ?

Yea too much food.back off then raise it back up in a week or two.

 

[DABaracuss]

Yea too much food.back off then raise it back up in a week or two.

Make sure you feeding cal/mag too.

 

[Waira]

...no mate, overall color fade can be caused by a host of things,... including defc.'s, or toxicities! ..... darker than normal color (for that plant) is often an early co-symptom of defc.'s, or in N's case, toxicity,.... Diagnostics are a bitch! .... for those leaves above, symptoms are generic enough that I can't make a call as to cause, could be defc. could be nute burn/off pH,.... it's the other info details that help pin down likely causes,.... having a solid reading of in-pot pH is literally the fulcrum off which the next steps to correction are made,... what did you feed, how much/often?