Is neem oil treated marijuana safe to smoke?

by Bob
(Three Rivers MI, USA)

As you may know, Michigan has a new medical marijuana law. I am trying to grow my own, and we've had problems with spider mites on other plants in the past. Are the Neem oil products safe to use on plants that are to be smoked? Thank you.

Comments for Is neem oil treated marijuana safe to smoke?

Click here to add your own comments

Smoking neem
by: Birgit

To start with, neem oil is not a toxic chemical. As a general rule, it's good for you. Traces sure don't hurt, or the EPA would not have exempted their typical requirement for maximum pesticide residues on agricultural products.

Neem safety, side effects and toxicity.

As for smoking it, how are we supposed to know that? Nobody has done studies (or would dream of funding studies) on smoking neem oil. Or on what kind of carcinogenic or otherwise harmful substances are created when it is burned.

Anything you burn will create substances that are harmful.

But even if traces of neem oil had a detrimental effect, it would be nowhere near as damaging to your lungs and overall health as smoking marijuana is in the first place. Even if lung cancer is not as much of an issue as it is with tobacco, smoking marijuana can still give you plenty of other respiratory and other health problems.

Adding traces of neem oil will not kill you any faster.

Neem + Marijuana
by: Anonymous

I would like to point out that A; Marijuana is not less likely then tobacco to give you lung cancer. It simply won't and may in fact lower your chances for contracting lung cancer(source: ""). And B; Recent marijuana research is continually finding that cannabinoids (the active ingredients in marijuana/cannabis)can stunt and/or fight many cancers. If you would like to do your own research instead of falling into prohibitionist propaganda, I suggest you start with NORML ( ). It has proven to be a great provider of legitimate information.

I apologize if this is off topic for this board but as I was interested in the neem plant after watching the movie (How High) I felt it necessary to point out the prejudice in the above answer to this question.

As for how, neem may affect marijuana when smoked. I have no idea, but if it is not something practiced by the people of India who have been around and understand this very versatile and useful plant then I would not bother with trying it myself as they probably know what they are doing.

Growing myths
by: Mythbuster

Those posts have to be some of the most ridiculous statements I have ever read.

Yes, smoking Neem is probably bad for you. Whether or not the other stuff in marijuana is bad for you also is irrelevant.

Yes, smoking enough of anything will probably give you cancer. Especially marijuana grown in Mexico or by someone who is trying to make money from doing it like medical marijuana growers.

Do yourself a favor. Grow you own and learn good cultivation techniques in order avoid pests in the first place. Then you won't need to use Neem.

If you do have to use it. NEVER use it during the flowering cycle and trim all the fan leaves away after harvest.

Vape it; don't smoke it!
by: Anonymous

Instead of smoking it, people should consider vaping it. I myself am curious about whether neem can be vaped and have decided to ask the mod.

Neem oil
by: Anonymous

Vaporizing bud with neem oil in it is fucking sickly gross.

by: Anonymous

I've been growing marijuana for over 40 years now and use neem oil all the time, even on BUDDING PLANTS. No, it wont hurt you if its on the buds.

If you're growing outdoor ad you're REALLY worried about it, remember that if you apply it properly it is water soluble. Rinse your plants a couple of days before harvest and you wont even know it ever HAD neem on it.

by: Anonymous

Why the hell would you have neem oil on your buds? If you can't control mites and powder mold before you flower your plant quit growing weed armature!!!

Pests on Cannibus
by: venice beach grower

I have been growing outdoors for quite a while now, and the only pests I have had issues with are the tiny worms that come from the eggs that the white moth like butterfly lays.

I suspect all butterflies ..they are extremely hard to see and require a lot of time to examine every bud daily. So, can I spray neem oil during the budding period?

by: Anonymous

I have a problem with the worms and it's only during flowering. I do agree it's the white butterfly doing the damage. It starts at the tops. You have to check them every day.

Neem Oil is Harmless
by: Anonymous

Many products made with the neem tree are used by humans in India like foods, cosmetics, medicines, etc. It would take large amounts to have a negative effect. It is probably medicinal in small doses.

Neemy Buds
by: capt neemo

My first grow was a winter grow with no bugs at all my second I got spider mites real bad and didn’t really figure it out until it was way too late; takes a week to get Ladybugs so I had to neem my budding plants. NEVER NEVER NEVER NEVER NEEM YOUR PLANTS IN FLOWERING STAGE YOU WILL RUIN YOUR BUDS. I am so mad at myself for being this stupid.

I keep trying a new one thinking maybe it’s not that bad. But all I taste is neem and I get a weird high and a splitting headache with bad sore throat. I have started rinsing my buds before I dry them and that seems to make it a little better.

Don't Smoke Neem
by: Oregon Green

Neem is used in small quantities to kill insects, parasites, germs etc. Don't eat it or smoke it unless you are trying to do the same. With all meds/pesticides there is a benefit to harm ratio.

A lower temperature (<74 degrees) will control mites by slowing reproduction. This slows mite reproduction enough that the plants will outgrow them and you won't need chemicals.

Use Neem in the vegan while things correct and during hotter times of the year to keep things safely in balance. Use it exactly as recommended on the label.

Nobody wants to consume poisons on/in their food or medicine. Don't produce it unless you are committed to doing it right. Medical Cannibis has made it safer to produce it properly. Please do so. Residue is allowed on foods because the consumer is expected to wash their food for numerous reasons.

Black bug on marjuana plants a week before harvest

I want to put neem oil with dish soap and water to get rid of black bugs.

Wow! 4-15-2014
by: MMMP Grower, Twining, MI

Wish these posts were dated. I don't know how old this is.

Getting to THE ORIGINAL QUESTION "Are the Neem oil products safe to use on plants that are to be smoked?" I would say yes during growing, providing they are rinsed like "40 year grower" said. Neem Oil breaks down into it's natural elements within 7-10 days leaving no residual impact on the environment. But that doesn't mean those elements should remain on your plant. Rinse it well. Buds have a more intricate & impenetrable structure & even after the 7-10 days, you may not be able to totally wash away all residue.

FOR Derrrrr..... by: Anonymous
Why would you leave such unhelpful information? AMATEUR!

FOR Growing myths by: Mythbuster
I assume you are trying to grow a myth.
"smoking enough of ANYTHING will PROBABLY give you cancer." Unhelpful. "Especially marijuana grown... by someone... like medical marijuana growers." Where would you even get this idea?

by: Anonymous

use the neem oil all the way but do a 2 week flush before harvest--as with any pot plant--nothing but water

by: Anonymous

I dont even care who is right or wrong. This post was an interesting and kind of funny read.

First Hand Experience
by: JD

I can tell you from first hand experience that spraying cannabis with Neem oil during the bloom will render the crop completely worthless. Before I knew proper propagation, I grew a crop from homegrown seeds, and also made the mistake of spraying it with neem oil several times during bloom. The weed turned out really weak, so I hashed it out, and after I took a couple hits off the hash, I got good and stoned, but also felt really sick. I continued feeling sick for three days!-- weak all over, no appetite, a funny smell in my mouth, and a constant need for pain killers for a splitting head ache.

As a former hippy from 1968
by: Anonymous

We used to just smoke the bugs.

this is funny
by: Anonymous

I was just cruising the web seeing if anybody's done any research around further on neem or if it has grown in popularity for the new generation of growers because I am constantly asked what is that funky, hippy shit you use to keep your plants happy and healthy around such bug attracting other plants in your garden. In my oppinion if you smoke a little neem that's the least of your worries, there's folks out there bug bombing during bud, chemical spraying during bud and not flushing the last bit of the cycle before harvest. Neem has been every gardeners natural bug repellant from the beginning of crop style growing. As a rule of thumb I always only neem during veg, it gives the plant that little extra protection to get it big and strong. Honestly y'all need to try just planting some marigolds around the base of your plants and if you're really concerned about the worms and the moths that lay the larvae, throw some netting type material over the main part of the plant so the pesky moths arent able to land and lay.

What people should be concerned about, too, is folks that don't know how to neem properly or those that overly spray near bee hives, turns out there's studies showing high quantities near to bee hives may be having adverse effects on the hives health and the honey.

by: Anonymous

I, too, have to say this whole blog has been an enjoyable read. I also am leaning toward it NOT being harmful, the Neem Oil that is. :)

To all professionals
by: Anonymous

Neighbor put plants outside with aphids, now I got them on my out door flowering plants. What the hell do I do now?

Hurting unit
by: Anonymous

Anybody ever use fertilome triple action with neem during flower?

more lost than ever
by: discouraged

I'm pretty sure I put the neem on too late. Now I think this crop is lost. I too seem to get a headache after smoking my outdoor.

Love living in a legal state!!!
by: Anonymous

Loved reading this thread was educational for sure :-) Neem oil is a very commonly used and accepted "pesticide" here in Washington 85% of growers use it.
They are required to state it on their packaging because, like anything else it may cause adverse effects in some people .
Have faith... growers know what they're doing and wouldn't use it if they weren't comfortable smoking whatever residual amounts remain after rinse.

watered with neem?
by: Anonymous

Has anyone ever watered the plants with water mixed with neem?

The truth has been said.
by: Green giant

Consumption of need is a effect unwanted. Through inhalation oral of compound and by burning. Each having a different effect. Exposure would be similar in effect as to what insects would be having.
Plants will absorb the chemical as application rate continues. As for why specific side effect occurs such as headaches it has not been determined. This is actually and is advised not to use been when in flowering phase of growing.

Prevention is key
by: CoHippyChick

I'm blown away by many of the comments on this site, especially the ignorant unhelpful, uneducated comments from people who haven't bothered to update their information on marijuana since reefer madness. Research has debunked so much and proven so many health benefits so you should consider reeducating yourself before posting on marijuana sites. I use temperature in both veg and bloom and a neem oil in veg and then root drench as I go into bloom to fight the bug issue before it happens. This has been very helpful for my style of growing. It's better to prevent them BEFORE they happen than to fight those tiny pests in bloom.

neem oil on cannabis
by: Lisab

After reading all of the comments, I think I'll stick to only using neem, if necessary, during veg. I wouldn't want to add anything to my buds. The purer the better. After all, that's why we grow right? Thanks for the fun read. :-)

by: Happy grower

Some say the neem has taste issues, some say health problems, some say no problems. I feel when used properly it is a good product and if really necessary at flower time just go easy.
Personally I have had my BEST bug control from using lady bugs. Read up on them. Cheap, can add some only when you see a shortage of them on your plants.
I grow outdoors but if you don't mind them in your house they will do good inside too.

Neem Oil
by: Jeremy

Hey Folks:
If you could really see who was commenting on any of the issues here it would make you think twice before taking anything to heart.
Just look at the syntax and grammar and you will realize that those poster(s) barely made it out of the eight grade, probably have hair growing out of their noses and wouldn't know the difference between secondary and primary research.
Don't believe anything you read here. Put on your reading glasses, engage your clear, uncluttered and NOT stoned mind and do your own research.
Its fun not to be a loser.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Questions About Neem Oil.

Return to top

Return to Discover Neem Home Page

The NeemZine
Get free news and updates, new research results, answers to reader questions and more.



Don't worry -- your e-mail address is totally secure.
I promise to use it only to send you The Neemzine.