Can Stress Cause Hermaphrodite Marijuana Plants

February 18, 2021

Marijuana plants come in two forms: male and female. But what about plants that exhibit traits from both sexes? These are known as hermaphrodites, and they can be very frustrating for marijuana growers. In this article you will learn: Can stress cause hermaphrodite, how to avoid and how to identify. Hermaphroditic marijuana plants have grown both male and female flowers. That being said, hermaphrodites aren’t usually born that way.


They originally grow as either a male or female plant, and then develop the opposite sex’s characteristics because of certain outside influences or genetic traits.

What si a hermaphrodite
Hermaphrodite marijuana flower – powered by

If they occur in the garden of a grower who is not planning for the future, they can even be considered a nuisance. Their pollen will be released on the other female plants that could have been sinsemillas, essentially ruining the crop.

Tip: make sure to download my free Grow Bible for more information about hermaphrodite

Sometimes hermaphrodites don’t become such until the final days of the flowering period, but these don’t pose any threat to your sinsemilla plants because they won’t have time to release their pollen and fertilize them before you harvest the crop.

How does it happen?

There are two origins that could be to blame for your marijuana plants being hermaphrodites. The first is genetics. Some strains of marijuana simply have a higher sensitivity to hermaphroditism, such as Thai sativas.

How does cannabis hermaphroditism happen?

The second cause is environmental influences, which usually materializes as stress. Essentially, as soon as the plant “knows” that the conditions for flowering are too difficult, it will gain the traits of the opposite sex to pollinate its own female flowers by growing male pollen clusters, therefore shortening the flowering period.

The main stressors that might cause a marijuana plant to become a hermaphrodite include:
Photoperiod changes or disruptions
Temperatures being too high, or other environmental issues that the plant doesn’t thrive in
Leaving the harvesting until it is too late
Broken or damaged parts of the plant
Too much or too little water
Over fertilizing
Diseases or pest infestations, or phytotoxic product use, such as fungicides or pesticides
mother plants that have been growing for too long might begin producing hermaphroditic clones as well

Every female marijuana plant could become a hermaphrodite

When under the correct circumstances, any marijuana plant has the potential to become a hermaphrodite. It’s important to remember this when selecting a strain.

While strains with a higher tendency to become hermaphrodites increase the chances of it happening again, strains that don’t have this tendency very well might become hermaphrodites nonetheless.

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This usually occurs via the use of hormones, or bad treatment. The resulting stress can cause the flowering phase to be left to its own devices for too long.

It is an evolutionary trait for females to become hermaphrodites when it’s been too long, and they haven’t been fertilized yet, as it allows for the continuation of the species, despite difficult conditions.

Male vs. female

The function of the male plant is to produce pollen that fertilizes the female plant’s flowers, spurring it to grow seeds. Female plants that are never pollinated, such as when no male marijuana plants are growing in the area, continue to use their resources to grow the buds and flowers instead of seeds.

This produces more THC than male marijuana plants or fertilized female marijuana plants.

Male vs female

These unfertilized females are referred to as “sinsemilla,” which literally means “without seeds.” Because females are the only ones of the marijuana plants that will grow the resinous buds that are coveted by smokers of marijuana, sinsemillas can grow for longer, forming, even more, THC.

They are the coveted type of marijuana plants that every grower would like to achieve. But, considering that as much as half of every crop will be made up of males, this is a task that is not exactly easy to accomplish. If you can do it, however, you will be rewarded with an especially sweet, gentle smoke from your sinsemilla plants. So it is certainly worth the effort.

Learn to harvest and and protect your marijuana plants from stress like a pro in my downloadable Harvest Guide!

When they are old enough for flower development, male plants will grow little balls of buds that don’t have any white hairs. In contrast, the female plants will develop small white hairs and no ball-shaped buds. The male plants’ sacs will eventually open, and then push back their sepals in order to release pollen.

Male marijuana

If you are growing the plants outside, you can expect males to reveal themselves toward the end of July in temperate climates in the Northern Hemisphere. And toward the end of January in the Southern Hemisphere, although this depends somewhat on the variety of marijuana you are growing.

Once you establish which plants are males, you should harvest them immediately before they have a chance to pollinate any of the female plants. The main goal is to do it before the pollen carries over to your females. Make sure that you don’t jostle or shake them too much when you harvest them, so as to avoid accidentally fertilizing the females around them.

How to remove male marijuana plants

Males are not good for harvesting to smoke because, not only do they not have too much in terms of THC, but their pollen can actually be harmful to people. Male plants are, therefore, best discarded as soon as they are identified.

Remember, even one or two male plants can wreak havoc on your crop by fertilizing the entire garden’s worth of females, so be sure to keep an eye on each plant, to make sure it’s removed as soon as it begins exhibiting male characteristics.

Female marijuana plant

If you are looking at the female marijuana plants, you should be able to identify their flower without too much trouble. They look like small green seed pods that have two white, V-shaped hairs that poke out.

Occasionally the hairs (known as “stigmas”) will come in colors other than white. The clusters of flowers are considered the buds of the plant.

Generally speaking, female marijuana plants are also shorter, denser, and wider than their male counterparts. This is simply because, when the males are taller, they have a better chance of distributing their pollen further distances.

Female plants usually require between one and three weeks to go from their vegetation period to their flowering phase once the lighting has changed (either artificially or naturally).

Early identification?

Sometimes people think marijuana plants can be accurately identified as male or female before they have even reached sexual maturity. They jump at the chance because early identification can help immensely with your crop as it takes away much of the possibility that there could be the odd male that slips your notice when removing the males from your crop. However, this is sadly just a myth. How to tell: male or female Cannabis plant?

After just a couple of months of growth, marijuana plants sometimes develop some “pre flowers,” which often get beginner growers to thinking that they are lucky enough to identify their plants as male or female early.

Unfortunately, while it might be an indication of which sex that plant will turn out to be, it is not accurate or reliable. So to discard plants that appear male, for example, would risk throwing away an actual female plant that is precious to you. So do not make any rash decisions based on this odd pre-flowering.

This can only be done by force-flowering it. Unfortunately, this process can be very stressful for plants, which in turn produces poor cuttings. So how do you manage it?

Growing cannabis from cuttings

The best way to figure out if the plant is female is by first taking some cuttings from it and then force-flowering those cuttings straight away. It is less important if those cuttings are stressed out or damaged by this quick change than if the healthy mother plant is. Once you have established that the plant is female, you can take more cuttings and really cultivate them with dedication and care.

Other aspects you should consider to keep your plants stress-free are the environmental conditions of the space they are being grown in. Keep the area clean and make sure the timers well monitored.

Regularly inspect each plant for any signs of pests or insects. Make sure the plants are watered correctly and with the right frequency. Feed them a balanced nutrient mixture. Keep an eye on the trichomes before you harvest to make sure you don’t wait too long.

You can also help prevent the development of hermaphroditism before you have even purchased the seeds. The main thing you need to do is research the seeds you are interested in buying, before actually purchasing them. Don’t only rely on the information given by the distributor or company itself.

Looking for high quality seeds? Check out our seed bank to buy high quality seeds for higher yields

High Quality Seeds

Also check out the comments that growers who have actually used this strain have written. Read up on the seedbank’s official recommendations, and check in or even contact them about whether or not there is hermaphroditism in this strain. Generally speaking, strains that receive too many complaints of the hermaphroditism are taken off the market.

If you purchase feminized seeds, you can expect a higher tendency toward hermaphroditism than with feminized seeds. No matter what kind or strain of seed you are growing, however, it is important to often check your female plants for any male flowers that may develop over time as this could lead to major problems within your crop, and, therefore, needs to be dealt with accordingly.

Hermaphrodites are found

As soon as you confirm that one of your plants has both female and male flowers and it was discovered during the early stages of the flowering phase of growth, you should remove it from the area right away.

While it is indeed unfortunate to take away one of your plants from the future harvest, it is a necessary sacrifice that pays off hugely when the rest of your plants remain unpollinated females. If you hesitate and leave the hermaphrodite within the growing area for too long, it could be too late, and your entire crop could become pollinated.

If your plants are in the middle of the flowering phase, things need to be done a little differently. If the hermaphroditic plant just has a couple male flowers, they can simply be removed without removing the entire plant. Do this by using a sterilized pair of tweezers. How to Identify a Hermaphrodite

Another option is to simply spray water on those few male flowers, as water actually sterilizes pollen. Keep your eyes peeled for more banana-shaped flowers that might develop in the future.

If, however, the plant has developed quite a few male flowers, it is probably best to just remove the entire plant altogether. Otherwise you may not be able to stay on top of all of the male flowers, missing something and, therefore, ruining the rest of your crop. That is simply not a risk worth taking.

There is one other time in which you might discover a hermaphrodite among your female plants: at the end of the flowering phase. If this happens, you can simply harvest the plant straight away, before the male flowers even have time to drop their pollen on the surrounding females.

This is ideal because you will still have the harvest from that plant, but it might be just a bit earlier than you would prefer (which is not always a bad thing).

Do you want to read more about Harvesting time? Our free little Harvest Guide will help you determine the best moment to cut your plants. Download it here.

Seeds discovered in your harvest

If you have found seeds hidden amongst the buds that you have taken after the harvest of an all-female garden, then that shows that there were, in fact, hermaphrodites (or even just one hermaphrodite) living amongst your crop. Next time around, be more careful when checking your plants, or perhaps just inspect them more frequently.

Unless you want to grow them for very specific reasons, it is best not to grow the seeds that you have discovered because the chances are high that the resulting plants will be hermaphroditic as well.

It is generally safe to assume that plants whose parents you know exhibit certain traits, will also exhibit those same traits. Sometimes people attempt to feminize their seeds so that they have an entirely female crop before they have even begun the germination process.

Cannabis seeds discovered in your harvest

This feminization can be done in numerous ways, but in this case it can be done through a female plant becoming a hermaphrodite and self-pollinating, meaning that genetically the seeds have come from “two” females rather than one male and one female. This leads to increased chances that the seeds will be female.

However, many growers have complained that this simply leads to a huge crop of future hermaphrodites, or at least that the chances are far higher that these seeds will develop with both female and male flowers. It is therefore not advised to proceed in this manner, as it could end up being a total waste of time and energy. A crop full of hermaphrodites is no good for anyone.

Remember that plants with strong genetics have less change of getting sick and are less vulnerable for diseases, deficiency’s, pest and environmental stresses. So make sure to buy marijuana seeds from a trusted seed bank.

Faq about stress and marijuana plants

What is a hermaphrodite?

A plant having both male and female reproductive organs, structures, or tissue is know an hermaphrodite.

What causes hermaphrodite in marijuana plants?

There are two things that could be the cause of hermaphrodite in marijuana plants: Genetics and environmental influences, which usually materializes as stress.

how to prevent your marijuana plants from becoming hermaphroditic?

The most important thing to consider when attempting to prevent your marijuana plants from becoming hermaphroditic is to ensure that they are not stressed especially during the flowering period of their growth cycle. 

Thanks for reading. Please leave comments or questions below and don’t forget to download my free grow bible.


The founder of I Love Growing Marijuana, Robert Bergman, is a marijuana growing expert that enjoys sharing his knowledge with the world. He combines years of experience, ranging from small-scale grows to massive operations, with a passion for growing. His articles include tutorials on growing... [read more]


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  1. By Symptom Checker – Identify Marijuana Plant Problems ,20 Jul 2015
    […] Hermaphrodites […]
    1. By Nicole ,05 Oct 2019
      Hi there. I now have seeds was very careful to yank all males babysat them faithfully. I Went on vacation (at end of September) returned for harvest. Seeds are now in my buds😫 so is it worthless? I'm not a […]Read More
  2. By khaled ,12 Nov 2015
    White hairs have turned into orange and red x in the week of flowering What does it mean that I've turned around 50%
  3. By latewood.ILGM ,16 Nov 2015
    khaled. What do you mean? I can understand that you say your Pistils have turned orange-red, and the plant is finishing. After that...You lost me. Perhaps you would benefit from joining our support forum. Download and read our free grow […]Read More
  4. By Problems That Cause Marijuana Plants To Stress ,18 Nov 2015
    […] For example, it’s possible for your plants to grow just fine outdoors, but if you move them indoors, the stress can cause them to produce male flowers and exhibit traits of both plant genders. If this happens, your only […]Read More
  5. By carl austin ,27 Feb 2016
    I bought WW seeds from you. Planted one for a mother. During the fist two weeks after sprouting, the electricity went out several times ranging from 5 min to 6 hrs. Also the overhead light was left on in the […]Read More
  6. By latewood.ILGM ,02 Mar 2016
    I would advise you to grow her out. You only used 1 seed. It is a shame that you had bad luck with electricity. An alternative idea would be to take a couple cuttings and root them. If your 1 […]Read More
  7. By What Are Feminized Marijuana Seeds? ,18 Apr 2016
    […] marijuana plants. But there are some misconceptions about marijuana, feminized marijuana seeds and hermaphrodites (plants that display intersexuality) which should be addressed. Unlike more complex organisms, […]
  8. By Oatizel ,20 Jun 2016
    I have what looks like thorns growing on stem of plant. Was moving location and thorns seemed to decrease once move was over. Could plant be overstressed or sign of hermaphrodite?
  9. By Nuggy Nic ,15 Aug 2016
    Not very accurate. A hermsphrodire has both chromosomes. A female has 2x's. That comes from seed. It doesn't just happen. A female plant however makes it own pollen sacks due to stress which will make females as there is no […]Read More
  10. By Parker Wildeboer ,09 Feb 2017
    Hello Robert, or whomever helps answer my question, I'm having some hermaphrodite issues. I have multiple rooms, most inside a building, with one built in a greenhouse outside totally separate from the system inside. I had one plant go hermaphrodite […]Read More
  11. By latewood_ILGM ,14 Feb 2017
    Parker, It could be both. You could have carried pollen on your clothes, from room to room. Yes Stress does cause "hermies" but, in this day of hybrid genetics being bred with other hybrid genetics; It might just be an […]Read More
  12. By latewood_ILGM ,14 Feb 2017
    sorry for typo..I have no edit permissions ??? I meant Happy growing
  13. By Money85 ,05 Jun 2017
    Hello. I have a couple questions, hoping someone can help me out. Im sorta new to this. This is my 4th grow. Some of my plants leaves dont look rite an the leaves on top almost look like taco shaped. […]Read More
    1. By Roy ILGM ,06 Jun 2017
      Hi there, best hop onto the support forum where you can post pics and our experts can help you out – I❤️GM
  14. By Money85 ,05 Jun 2017
    Im growing in soil, temps around 77- 79, 600w mh for veg but just switched to hps for my last week of veg. Iv been vegging for/ goin on 8 weeks. I have 2 plants goin hoping theyll be monsters. […]Read More
  15. By newbo ,29 Oct 2017
    I'm in the end of week 7 of flower!!! Day 53 . and I found a Nana I cut it out !!! Should I go ahead and cut her down or what??? Please help
    1. By latewood_ILGM ,30 Oct 2017
      newbo, You can gently remove the pollen sack/s, and finish grow. Monitor plant each day thoroughly, and expect a seed or 2. No worries. This happens occasionally. Happy growing :)
  16. By envie1 ,22 Apr 2018
    Males & hermaphrodites should be removed as soon as they are found! Don't waste your time trying to save it by doing this or/& that because its still going to end up tasting like grass or worse.whatever you do, don't […]Read More
  17. By Johnny ,27 May 2018
    One of my plants turned hermafrodite when i super cropped it. I had a problem with its height as it stretched a lot during the first phase of flowering. The internet told me that I could super crop it by […]Read More
    1. By latewood_ILGM ,01 Jun 2018
      Johnny, That is about all you could hope for. Either cull the plant or do as you choose. It is your choice and a learning event. Not sure what happened to you becuase bvending a few branches generally does not […]Read More
  18. By crs ,06 Jun 2018
    Had a nice gorilla glue 2 months veg with nice female calyx pistols 2 wk flower top to bottom all balls even tiny flower on tops look fuzzy no pistols anywhere did this plant turn into a male doesn't display […]Read More
    1. By Jordannn ,15 May 2020
      Even with preflowers it's not a guarantee its female. Sounds like you had a male plant. Yes females usually preflower but males preflower sometimes looking like females. A male doesn't show pre balls, most males with have some preflower with […]Read More
  19. By WALDOZWACKYWEED ,19 Aug 2018
    I'm having a hermie issue not sure if it's the wildfire smoke or a autoflr trait happen in inside the greenhouse and outside too but not all turning going to try a mistr. I'm thinking its the smoke and the […]Read More
  20. By csaaphill ,06 Sep 2018
    I want to turn this male into a female or at least have it hermaphrodite on me is this possible or too late? What I mean is I believe this plant of mine is male it has the balls as […]Read More
  21. By csaaphill ,07 Sep 2018
    Ok the name was wrong silver colloidal or whatever it's called is what I meant but can you anyone? Or am I asking secrets no one wants to admit to. Newby first time ever except for a couple of times […]Read More
  22. By latewood_ILGM ,12 Sep 2018
    csaaphill, Your plant outdoors could have been pollinated by any number of sources in the neighborhood. With that said; If you have a hermaphroditic plant, there is nothing to do but grow it for what you can get. Colloidal Silver […]Read More
  23. By greg clarkson ,12 Oct 2018
    I just read your facts on hermaphrodites …...why are you listening to opinions ??? because they are not correct wonder the world looks at this phenomenon the way they do
    1. By latewood_ILGM ,16 Oct 2018
      greg clarkson, Who are you addressing and what exactly do you take issue with? Your statement is vague and we have no idea what you are critiquing. We look forward to your clarified reply. Peace :)
  24. By dixie ,16 Oct 2018
    I have plants in flower week 4 I believe just noticed a nanner on same plant top colas it's very close to light can that cause nanners I have had multiple runs no problem should not be a light leak
  25. By Karl ,14 May 2019
    Thanks Robert very informative
  26. By Frankie gange ,07 Apr 2020
    Like your information sound right but like to read more.
  27. By Bob ,13 Apr 2020
    I am curious to know if an Amnesia Haze Autoflower can go 40 days without showing signs of white pistils?Is this unusual as the genetics are from a reputable seed bank....Thanks
  28. By Dan ,13 Aug 2020
    Thanks for the info,was a good and educating read,cheers
  29. By Elizabeth ,20 Aug 2020
    I have only recently discovered this great place. (ILGM). I’d like to say thanks for being so very generous with so much great information. You folks are fantastic!! And I’ve learned so much. ❤️
  30. By Tone ,09 Oct 2020
    I am harvesting and I had taken 2 males out as soon as I saw the balls. Now the first plant that I started I found seeds in the buds,10 seeds. Is this still smokable? Or should I just toss […]Read More
  31. By Jim ,07 Nov 2020
    Friend planted some of your seed all from same strain og kush One looks different long skinny leaves while the other 2 plants are wide thick leaves they are now 3 weeks into flowering what should he do
  32. By Bill ,10 Dec 2020
    One of my Blue Dream plants became hermaphroditic this year. Totally my fault as it was a very dry year and some of the plant was damaged by wind. I had to remove that plant. A second plant also showed […]Read More
  33. By Chad ,27 Jan 2021
    Great advice, please send me a free light! Could really use a new flowering light
  34. By What are Feminized Seeds? – Your Weed Coupons ,03 Feb 2021
    […] like humans, cannabis plants have two dominant genders (though a third, hermaphrodite, is also possible). Like humans as well, the breeding process happens between a male and female […]

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