Be careful with "horticultural oil"

[senorx12562]

Just a heads up. I like it when I learn from someone else's mistake, so here's my latest one. I have a grow of 18 White Rhino clones about 2 weeks from going to 12/12. Here in Colorado, the dry climate makes the battle against spider mites pretty much constant. I'm trying to grow completely organically, so I found this stuff called Organicide, which is a horticultural oil made up of 93% edible fish oil, and the rest is sesame oil and lecithin. Anyway, I've used it before, and it worked ok, (although I've had to apply again), and it didn't seem to harm the plants. This time, I found a few of my little friends and immediately doused the shit out of all the plants with organicide, so much so that they looked like they had been dipped. A day or two later, my plants were showing signs of over-feeding. I'm growing in soil and always err on the side of too little feeding, so this is the first time I've seen that. (This is my first grow, so not a lot of experience regardless.) Some of the smaller leaves on some of the plants, although not discolored, were a little crispy on the ends. They had a pretty good growth spurt at the same time, but I had just fed them the day before I sprayed, so I didn't think much of it. In the course of my research on nitrogen overdoses, I read that fish emulsion is used to treat nitrogen deficiencies and the light bulb went on. I'll bet the fish oil, in combo with the feeding the day before, gave the plants a slight overdose of nitrogen! I don't think it is serious, and I plan to not feed for a while now, but its a damn good thing I tend to underfeed anyway, or this post might be tearstained. Any feedback is greatly appreciated.

senorx12562 Reviewed by senorx12562 on 10-27-2009. Be careful with "horticultural oil" Just a heads up. I like it when I learn from someone else's mistake, so here's my latest one. I have a grow of 18 White Rhino clones about 2 weeks from going to 12/12. Here in Colorado, the dry climate makes the battle against spider mites pretty much constant. I'm trying to grow completely organically, so I found this stuff called Organicide, which is a horticultural oil made up of 93% edible fish oil, and the rest is sesame oil and lecithin. Anyway, I've used it before, and it worked ok, Rating: 5

[senorx12562]

HELP!!! Just a follow up to the above. I checked the level of nutrients and the ph in the runoff water from one of my plants, and the ph was 5.9 (tap water here is 7.2ish) and the ppm was off the scale! (> 2000ppm). I'm in the process of flushing all of my plants which gets the ppm down to abt 1100-1200. Is this sufficient, or should I try to get it lower. Sorry, this should probably be in the plant problem section, but I'm too busy flushing to care right now.