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space101
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I completely disagree based off of my own experiences, spraying w/ hid lights on burning your plants is a myth. Especially if you use a surfactant/emulsifier of some type, that lens effect you speak of is not supposed to happen w/ a surfactant. Water beads normally and that could burn your plants like it would burn your cars paint, but w/ the surfactant it is supposed to be flat on your leaves so that the neem oil would coat your plants rather than bead up on them. I've almost always sprayed during lights on except when I first started growing due to these myths being perpetuated, I've also never rinsed neem off the next day regardless of concentration, it's pointless to put a protective layer on your plants keeping pests from biting only to wash it off the very next day? I've always felt spraying neem increased the health on my plants and not just visually. I've even sprayed w/o surfactants and still no burn from HID. I think it has to be something else messing w/ your plants, some pics would help us diagnose the probs.If you're spraying Neem on plants under HID lights, then you are going to burn the hell out of them. Under flourescents you should be ok as long as the light isn't too close to the plants. Neem oil and whatever emulsifier you used (Dawn, Dr. Brommers, etc) plus the water acts as a lens that lasts for a while. Many foliar sprays indicate whether they are safe for use under HID lighting; Neem doesn't really say one way or the other (based on packaging I've seen recently) but in my experience, it's not OK to use with HID's running.
I have been using Neem for over 10 years on everything from garden vegetables to roses (works great to keep aphids at bay if used early in the season and weekly throughout) to cannabis and not once has it ever harmed my plants.
What concentrations are you using? Anything in excess is going to have undesirable results...
greener
I completely disagree based off of my own experiences, spraying w/ hid lights on burning your plants is a myth. Especially if you use a surfactant/emulsifier of some type, that lens effect you speak of is not supposed to happen w/ a surfactant. Water beads normally and that could burn your plants like it would burn your cars paint, but w/ the surfactant it is supposed to be flat on your leaves so that the neem oil would coat your plants rather than bead up on them. I've almost always sprayed during lights on except when I first started growing due to these myths being perpetuated, I've also never rinsed neem off the next day regardless of concentration, it's pointless to put a protective layer on your plants keeping pests from biting only to wash it off the very next day? I've always felt spraying neem increased the health on my plants and not just visually. I've even sprayed w/o surfactants and still no burn from HID. I think it has to be something else messing w/ your plants, some pics would help us diagnose the probs.
Depends on why your plants are burning from the foliar spray in the first place, a surfactant simply spreads the water to give it surface, so that it won't be beads of water that magnify water like a water spot on your car. It can cause your plants to nutrient burn situation to worsen if you mixed the EC of your foliar spray too strong, as the surfactant also increases the absorbtion efficiency of your foliar spray.i was under the impression that a surfactant worsened the problem of burning. is that not the case??
hey oregong, I meant no disrespect to you or anyone either, hope I didn't come off that way. I just felt strongly about my experience as I used to do it that way also, but after having sprayed right when lights came on many times and having no burn or other ill effects, I came to the conclusion that foliar spraying burning when lights are on is a myth.No disrespect, but what I had to say came from my own direct experience under HID lights. Results may vary I suppose. The OP didn't respond to our queries for more information, so really, any further discussion about what may or may not have happened in his case, is moot.
I encourage people to pursue their own results when using foliar sprays of any sort. Again, the results may vary...
I take no offense to your input, as open discussion here is a good thing for us all. I too have never "rinsed" neem off and I agree with you Areojoe; to do so would completely defeat the purpose of applying a foliar spray in the first place. I also agree that neem appears to have a symbiotic effect on the plants and increase their strength and ability to resist infestations.
Thanks!!!
greener
Thanks for the tip man, must've been a helluva lot of neem. I've never burned my plants w/ neem oil and I don't even measure out how much I mix, but you'll know when neem is mixed right cause it leafs a glossy sheen on your plants.mixing your neem to strong will fry your plants, lights on or off.
First hand learning.
Wash them to save them.
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