Robert Bergman

January 28, 2021

Mr. Nice guy is a medical cannabis strain created by Sensi Seeds that is named after one of the most legendary figures in the history of marijuana. This indica hybrid is a potent healer and a fun and relaxing smoke, making you feel all the good vibrations, and inducing happiness all around.

This strain was appropriately named after Howard Marks – the Oxford alumni who became one of the biggest cannabis smugglers of all time. Marks released his autobiography narrating his colorful and interesting life after serving 7 years of hard time in federal prison and aptly named it “Mr. Nice”.

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Mr. Nice guy is a beautifully diverse strain that was created by crossing the uber-strain G13 with the Hash Plant. This strain is a potent indica-dominant hybrid that kicks in slowly and gently, with a solid and enjoyable high. This plant is especially and distinctively sweet smelling and aromatic.

Information about Mr. Nice guy Strain:

ORIGING13 mixed with Hash Plant
EFFECTSrelaxed – 10
happy – 7
sleepy – 7
euphoric – 7
uplifted – 5
dry eyes – 10
dizzy – 3
headache – 3
paranoid – 1
FRAGRANCEearthy, pungent, skunky, spicy, sweet
FLAVORSearthy, sweet, pungent, pine, spicy, woody
MEDICALstress – 10
pain – 7
insomnia – 6
depression – 5
headaches – 4
THC CONTENT %13%-19%
CBD %1.00%
INDICA / SATIVA %80% / 20%
OUTDOOR YIELD16oz/ plant
CLIMATEsunny, warm mediterranean outdoor climate

* 10 is the highest
* 1 is the lowest


A strong indica dominant strain, Mr. Nice guy is sure to make you feel relaxed and slightly drowsy, draining you of all your stress of the day and allowing you to truly unwind. This strain’s effects are quite physical, making your body feel heavy and slowing you down, potentially serving up a slight couch-lock for some.

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Mr. Nice guy has a powerful and potent way of making you feel happy, relieving you of tension and stress, and fully indulging only positive thoughts. You may feel sleepy on this strong indica, and it is highly recommended that you try this strain when you are close to being ready for bedtime.

Mr. Nice Effects
Is A Smooth Talking And Gentle TranquilizerImage powered by Medicaljane.com

While producing a heavy body-stone, this strain can make your mind feel lifted and light, indulging many creative thoughts with sudden bursts of euphoria. Mr. Nice guy can make you feel uplifted and optimistic, and might make you succumb to the munchies, so keep the snacks ready and the fridge filled to the brim.


Mr. Nice guy smells like a pleasant pungent plant that carries a scent that will fill up a room with its aroma, instantly. This strain will remind you of a skunky sweet fragrance that is sure to entice you, preparing you for the sweet smoking experience that is to come.


This indica-dominant strain carries a very strong earthy flavor that is invigorating to the senses. Mr. Nice is both spicy and sweet and provides a gentle fruitiness in its smoke. This strain is very enjoyable to smoke, with its hues of pine and woody aftertaste.

Read our full review on XJ-13 that is made by crossing fan-favorite Jack Herer and uber-strain G-13

Adverse reactions

Mr. Nice has some side effects, that generally only occur when you have smoked too much, as this strain is potent, however relatively gentle in its effects. This strain can give you a case of the dry mouth, making you feel parched – a feeling that often is accompanied with a dry and itchy eye sensation.

Adverse Reaction Of Mr. Nice
Adverse Reaction Of Mr. NiceImage powered by 420magazine.com

At times, you may feel a slight dizziness when smoking this strain. Mr. Nice guy may also produce a mild headache in some, which doesn’t usually last long. In rare cases you may feel a little anxious and paranoid when smoking this strain, so go easy if it is in fact your first time smoking this particular indica hybrid.


Mr. Nice guy was appropriately named for many reasons. It is a useful medical strain, that has a number of healing talents. This indica dominant strain is very good at managing signs and symptoms of chronic stress, calming both the mind and the body, and instilling a feeling of content.

TIP: Looking to buy Mr Nice seeds? Check out this marijuana seed shop

This strain is also very good at soothing many aches and pains, which is why many medical cannabis patients favor it. Mr. Nice is especially gentle on the body, even with its heavy indica features, and can take care of illnesses such as muscle spasms and back pains, and allowing patients to lead a normal and pain-free day to day life.

Mr. Nice guy Medical
Mr. Nice guy Medical

Mr. Nice has proven to be effective in easing mood disorder such as depression and anxiety, and also helping patients who suffer from restlessness and insomnia. This strain can allow your thoughts to move slower, therefore reducing feelings of inadequacy and also eliminating headaches.


This particular strain takes a more experienced grower to cultivate it, as it needs some special attention in being trimmed and maintained in an optimized setting. Mr. Nice guy prefers a sunny and warm mediterranean climate where it can get a lot of sunlight and truly flourish.

Flowering Time


Mr. Nice guy can produce a generous yield, and you can expect an average of 14 ounces per square meter of good and sweet smelling bud. This strain takes an estimated 9 to 11 weeks to flower and be ready for a superfluous harvest.


This indica-dominant strain can produce around 16 ounces of good weed per plant. Mr. Nice can be expected to be ready for a full and hearty harvest around the middle to late October.

Have you ever smoked or grown your own Mr. Nice guy? Please let me know what you think about this marijuana strain in the comments below.


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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 Matthew ,17 Sep 2019
    I aI am currently in the middle of my sixth week growing I missed a nice seed I was lucky enough to find. Any helpfulAny helpful advice would be awesome I am simply growing a good compost soil with some […]Read More

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