Fastbuds LSD25 boron maybe?

[McDee]

--McDee, something is FUBAR in that pot, .. I'm with pop22, it's very suspect for badly off pH,.. I see multiple defc.s', top to bottom,... an actual in-pot pH is called for, or at the very least a run-off test of pH and ppm's from water only; it's a crude estimate, but it will give a ballpark indication if the pH is badly off, and if it's being caused by nutrient build-up or not,... if other plants are fine from the same nutes, etc., then something went tits-up with this one,... your feeds, at 25% are pretty mild,.. any idea what ppm/EC that measures out to? Do you water/feed to significant run-off? this is a must in soilless, especially with coco,... coco is a huge Ca hog until sated, are you using only 25% str. Ca-Mg as well?

I just put some plain water 6.2 ph run off is bouncing from 5.6 -5.7 holding at 5.7. TDS of runoff is 271. Going to flush rest of gallon and check ph. What should my soil runoff be?

 

[McDee]

I just put some plain water 6.2 ph run off is bouncing from 5.6 -5.7 holding at 5.7. TDS of runoff is 271. Going to flush rest of gallon and check ph. What should my soil runoff be?

Ph if runoff is now 6.2, TDS now is 695. Should I leave her go, or flush more water?

 

[Waira]

I think you're good on both Mcdee,... peat and coco like lower pH than true soil, which this isn't... what the r-o should be in that blend, I dunno,.. with pure coco, it's should be no more than about 250ppm from inputs according to my coco-nut guru's,... that's because they are fed nearly/literally constantly, mildly, with 20+% run-off depending on water source and ppm's,.... how did the run-off ppm go from 271 to 695? Did you just fertilize recently? that's a bit high but not bad for plants this stage,... no more flushing mate, with all that coco in there you risk messing up the coco's CEC and make cause Ca defc., Mg maybe, as well,.. could be her roots are just not happy, and will cause host of issues,...

 

[McDee]

I think you're good on both Mcdee,... peat and coco like lower pH than true soil, which this isn't... what the r-o should be in that blend, I dunno,.. with pure coco, it's should be no more than about 250ppm from inputs according to my coco-nut guru's,... that's because they are fed nearly/literally constantly, mildly, with 20+% run-off depending on water source and ppm's,.... how did the run-off ppm go from 271 to 695? Did you just fertilize recently? that's a bit high but not bad for plants this stage,... no more flushing mate, with all that coco in there you risk messing up the coco's CEC and make cause Ca defc., Mg maybe, as well,.. could be her roots are just not happy, and will cause host of issues,...

Only about 20-30% coco added in. What should i ph my water to? This is second grow with this medium blend 5 total plants 1st issue no idea she is growing tho. Not sure about tds, I fed the day before so maybe there was a pocket with less nutrients????? Only my 4th grow so still learning lol. Any recommendations as far as fed should give nutrients next time or plain water? Thanks for all your help

 

[Waira]

... well, you're using RO, so firstly and always, add the Ca-Mg first,.. it'll give the water some pH buffering capacity, otherwise, trying to pH adjust RO water is a fools errand! The meters don't work well in purest water (chemical/mechanical reasons), and with no buffering Ca/MgCO3 in there it's prone to wild swings from even the smallest inputs,.. dissolved CO2 will acidify it before long (make carbonic acid in solution),.... So add Ca-mg first, then nutes, then adjust if needed,.. feeds are usually acidic anyway,....I'd stay in mid-6's or a bit lower if you can,... BUT the [HASHTAG]#1[/HASHTAG] thing you need to know is the in-pot pH, that will determine what/if you adjust your water and feeds inputs to! You need an Accurate 8 soil pH probe, not expensive at all, and worth every penny,... run-off testing is crude at best, a last resort method in soils,... how's she looking, progression still happening, or halted?