Five weeks till harvest and the shit hit the fan

[Snowbear]

hi guys I have these photo plants going along side my autos . I watered all the plants about 3 days ago with the same amount of nutes , fox farm tiger bloom one of the plants has some markings on the leaves and they are starting to curl .

Does any one have any suggestions I have checked them for pests and I can't see any .i have thought about flushing out the soil but I'm not sure if that would be right any help would be gratefully received
Many thanks
Snow

Any help

 

[SOOTDAWG]

check your ph.....possibly locked up....when locked the plants will start bricking in the middle of leaves and start marbling...along with showing signs of toxicity.....i flush with cal/mag water...and then go 1/4 nutes for first water

 

[Snowbear]

Cheers mate I always use a ph meter but it might be broken so yes I will get another a see if they match . I think that's sound advice to flush the soil and start again thanks dude .

 

[Rev. Green Genes]

I just had same issue, pH meter broke, a week later I got my new meter, it was down to 4.5. Luckily she didn't show symptoms, but yours did. I am going to order another meter for backup soon.

 

[Snowbear]

I'm going to do the same have a back up to just check it should be here tomorrow so a flush and start again and hope that , that cures it .

 

[Mike20132]

I'm going to do the same have a back up to just check it should be here tomorrow so a flush and start again and hope that , that cures it .

pH is such a HUGE factor, it's worth having a reliable meter. I picked up an Apera pH20 on advice I got in an older thread. Works amazingly well. Definitely get two calibration solutions (4.0 and 7.0) and test it every few weeks. Also, for how cheap they are, keeping an old-fashioned reagent test kit is a great sanity check when you are CONVINCED that the meter has to be wrong. The standard General Hydro test kit is around 5 quid, so it's hard to find a reason NOT to have it. I'm not sure keeping a second pen around is really necessary with the reagent kit. There's no harm in it, but to me it seems an unnecessary expense unless it takes a long time to get a replacement. Good pH pens aren't cheap.

 

[GoAuto6]

And if you grow in a soil or soiless medium a good probe is suggested also. The accurate 8 has been real good to me.

 

[Waira]

-- Snow, this looks Mg defc. related, question is exactly how,... lack-of, pH lockout, or the more esoteric competitive cation uptake caused by excess of K, Ca,... So, I ned you to fill out the patinet form in the highlighted section above here,.. copy and paste into this thread, fill in; nute info very important in this case!... all this info is critical to figuring out WTF is happening,.... that leaf curl is pretty rare in Mg defc., might hint at other co-problems.... most important is your mediums in-pot pH! Run-off is unreliable for accuracy,... and those cheapo skinny soil pH probes are lousy too,... As mentioned, the Accurate 8 is the best for the $,.... don't mix up a pH meter (liquids only) with a probe--> hsoil:- the long probe unit here is the A8 actually! Do you have a probe?
here's the deal: how this gets fixed depends entirely on the cause, and done wrong, matters will go FUBAR,.. best case, it's a simple lack-of, easy fix with soil and foliar Ca-Mg; otherwise it's likely a pH lockout, meaning the Mg is there, but off pH renders it unabsorbable,... I don't see other signs of burning, too much fert's, which could indicate the cation uptake thing, but that's not out for sure either yet,....
Flushing, with 2-3x the pot volume of water, is a last resort fix... it's a trauma all in itself, super-saturating the soil like that,.. if it's coco, it's done totally differently,... So, get me info and we'll see what the next step is,..

 

[Snowbear]

I sorted the problem out I flushed the plant and started again with a weak solution of nutes . I also found out the cause I moved my grow room so I used a bigger container to get the water to the plants I mixed the nutes and tested the solution but what I had not done was mix it very well the last plant I watered was that one so I think a lot of the nutes were left in the bottom of the container that seaweed extract sinks if you don't mix it well . I was lucky this time lesson learnt thanks every one .

 

[Waira]

good to hear mate, Cheers on the fix!