OK so I’ve got a real puzzler going on. plants are looking poor! Soil used is an hp pro mix with microcorrizae or however u spell it. Now at week 3 of flower some of the plants are looking very yellowish, larger than normal amount of dead/very yellow leaves etc. Lower leaves. This has been going on for a month, And that’s why I flushed the hell out them feb14th thru 19th at start of flowering. Ec’s were anywhere from 1.6 up to 3. I flushed down to ecs of between .8 thru 1.2. Yes, it took a while to do them as I was picking thru and as they were dry enough I was doing them then. (52 plants, Every plant is tagged with letter F and date flushed) Anyway, since the flush there are several plants looking like they just gonna burn up and die. I watered them once since flush as they were very dry and thirsty with a 50% nute solution (canna brand, not cheap stuff) with an ec of about 1.2-1.3. Lots of runoff, I used 5-7L or more per plant. I know how to water. So tonight I flushed the first two that were looking so bad with plain ph’d water and got ec readings of 2.4 out of one and 1.8 out of second. For example, One I’m flush feeding now refuses to go below 1.6 ec, that’s after 12 litres of a weak nute solution (ec 1.25) has run thru. So, I guess the question is....where is the excess nutrients coming from? Could there be something wrong with that soil mix? It must have slow release nutes oozing outta somewhere! it’s not supposed to have a slow release anything in it. What can I do at this point- I am gonna continue on and setup properly for a flushathon over next couple days unless you folks can come up with an alternative.
By flush I mean flood into pots plain Ph’d to 6.1-6.4 water till ec runoff is in range followed by a 3L feed of 50% strength nutes, ec of 1.2 to 1.3, Drain for 15-20 minutes then put back in tray. If it still drains, I shop vac it out, never standing water left. but WHY and WHERE is this excess ec reading coming from? the plants are burning up...And yes, I had my ec meter calibrated against a very expensive one, it was within 4% accuracy of a blue lab truncheon. My hard well water ec’s around .6 on its own, we have iron and calcium here, but it’s very good to drink. that .6 ec for the water is not removed from the 1.2-1.3 final ec of the nutes, the nutes themselves must be only .7 or .8 ec. My last grow suffered similarly which is why I reduced the nutes by about half for this grow thinking that this would help. If you’ve made it thru this far and have ANY advice on this, my gosh your input will be appreciated!
Stumped Canuck
By flush I mean flood into pots plain Ph’d to 6.1-6.4 water till ec runoff is in range followed by a 3L feed of 50% strength nutes, ec of 1.2 to 1.3, Drain for 15-20 minutes then put back in tray. If it still drains, I shop vac it out, never standing water left. but WHY and WHERE is this excess ec reading coming from? the plants are burning up...And yes, I had my ec meter calibrated against a very expensive one, it was within 4% accuracy of a blue lab truncheon. My hard well water ec’s around .6 on its own, we have iron and calcium here, but it’s very good to drink. that .6 ec for the water is not removed from the 1.2-1.3 final ec of the nutes, the nutes themselves must be only .7 or .8 ec. My last grow suffered similarly which is why I reduced the nutes by about half for this grow thinking that this would help. If you’ve made it thru this far and have ANY advice on this, my gosh your input will be appreciated!
Stumped Canuck
