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Forbidden Runtz Auto

The Oh-So Famous Runtz Now in Autoflowering Form!
Pack
1
fem
$15.00
Orders sent to United States are shipped from the warehouse in
In stock
Pack
1 Feminized seed
$15.00 / Seed
1 Feminized seed
$15.00 / Seed
2 Feminized seeds
$14.50 / Seed
3 Feminized seeds
$14.00 / Seed
5 Feminized seeds
$13.00 / Seed
10 Feminized seeds
$12.00 / Seed
25 Feminized seeds
$9.80 / Seed
50 Feminized seeds
$8.20 / Seed
100 Feminized seeds
$5.99 / Seed
500 Feminized seeds
$3.60 / Seed
1000 Feminized seeds
$2.40 / Seed
Add to Cart
Your order will be shipped 25 June by USPS, Shipping cost $6.50
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  • Genetics: Forbidden Runtz Auto
  • Seed Type: Feminized Auto
  • Beginners dream strain. Everything that makes good genetics good without needing much maintenance or extra effort.
  • Flavorful flowers. A terpene-rich strain that’s up to par with even the most demanding smokers.
  • Among the strongest of all times. With 26% THC, an unforgettable high even for avid smokers.

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Tech Radar

Forbidden Runtz Auto
Climate Intended
Very Hot
Hot
Moderate
Cold
Very Cold
Genes
Sativa
Mostly Sativa
Hybrid
Mostly Indica
Indica
Smell
Very Strong
Strong
Moderate
No filter needed
High
Medium
Low

Tech Specs

Parameter Value
Taste Earthy, Fruits, Sweet
CBD < 1%
Harvest US Indoor 1.5 – 1.8 oz/ft2
Harvest US Outdoor 2 – 5 oz/plant
Size XXL
Height US 35 – 51 inches
Flowering 9 weeks
Room Indoor/Outdoor/Greenhouse/Mixlight
Gender 100% Female
Genes Mostly indica
Genes Sativa 35%/Indica 65%
Genetics Forbidden Runtz Auto
Seed Type Autoflowering

Description

Forbidden Runtz Auto was bred for growers who judge a strain by the first thing they see after opening the jar. Large, chunky flowers, overwhelming aroma, and a level of density rarely seen in autoflowers make this cultivar stand out long before the first smoke.

She develops into a large, vigorous plant with a broad structure and thick side branches capable of carrying serious weight. As flowering progresses, rounded buds begin stacking along every branch before swelling into dense, elongated colas that dominate the canopy. By harvest, nearly every branch is loaded with heavyweight flowers that feel surprisingly solid in the hand.

Bag appeal is where Forbidden Runtz Auto truly shines. The buds are large and beautifully formed, with swollen calyxes, bright orange pistils, and a heavy coating of trichomes that gives them a frosted finish. Their distinctive spear-shaped structure and exceptional density create the kind of flowers that immediately grab attention in any stash jar.

The aroma is rich, sweet, and impossible to ignore. Notes of ripe fruit and sugary candy lead the way, followed by creamy undertones and subtle citrus accents that become more noticeable with every inhale. The flavor continues to evolve throughout the session, shifting between sweet, fruity, creamy, and slightly tangy notes that keep the palate engaged from start to finish.

The effects arrive quickly with an upbeat and cheerful head high that encourages conversation, laughter, and an overall sense of wellbeing. As the experience unfolds, the physical side becomes more noticeable, gradually relaxing muscles and easing tension without abruptly ending the mental stimulation. The result is a smooth transition from energetic enjoyment to comfortable relaxation.

Forbidden Runtz Auto is all about indulgence. Bigger buds, louder flavors, and stronger effects than most growers expect from an autoflower. For those chasing candy terpenes, impressive bag appeal, and flowers that look every bit as good as they smoke, this cultivar delivers on every front.

Certificate of analysis

Packaging

Sealed to ensure authenticity
Waterproof Coating
Aluminium interior lining
Pack front
Pack seed
Pack back
Protective sticker
QR code
Scratchable serial number

Compare with similar strains

Rating
Indoor
Harvest US Outdoor
Size
Height US
Flowering
Genes
450 – 550 gr/m2
2 – 5 oz/plant
XXL
35 – 51 inches
9 weeks
Mostly indica
Sativa 35%/Indica 65%
550 – 650 gr/m2
2 – 12 oz/plant
XXL
39 – 60 inches
10 weeks
Hybrid
Sativa 45%/Indica 55%
450 – 600 gr/m2
3 – 11 oz/plant
XXL
35 – 59 inches
10 weeks
Hybrid
Sativa 55%/Indica 45%
550 – 650 gr/m2
2 – 12 oz/plant
XXL
39 – 60 inches
9 weeks
Mostly indica
Sativa 30%/Indica 70%
400 – 500 gr/m2
2 – 5 oz/plant
XL
24 – 43 inches
8 – 9 weeks
Mostly indica
Sativa 40%/Indica 60%
450 – 600 gr/m2
2 – 9 oz/plant
XXL
27 – 47 inches
9 – 10 weeks
Sativa 60%/Indica 40%
450 – 550 gr/m2
2 – 6 oz/plant
XL
31 – 47 inches
9 – 10 weeks
Sativa 20%/Indica 80%
450 – 550 gr/m2
2 – 5 oz/plant
XL
28 – 47 inches
8 – 9 weeks
Hybrid
Sativa 60%/Indica 40%
450 – 550 gr/m2
2 – 7 oz/plant
XL
31 – 47 inches
8 weeks
Hybrid
Sativa 30%/Indica 70%
400 – 550 gr/m2
2 – 9 oz/plant
XL
31 – 47 inches
9 – 10 weeks
Hybrid
Sativa 55%/Indica 45%
450 – 550 gr/m2
2 – 7 oz/plant
XL
28 – 47 inches
8 – 9 weeks
Hybrid
Sativa 50%/Indica 50%
400 – 550 gr/m2
2 – 5 oz/plant
L
24 – 39 inches
8 weeks
Sativa 55%/Indica 45%
450 – 550 gr/m2
2 – 7 oz/plant
XL
28 – 47 inches
9 weeks
Sativa 40%/Indica 60%
500 – 600 gr/m2
3 – 11 oz/plant
XXL
31 – 59 inches
8 – 9 weeks
Sativa 25%/Indica 75%
500 – 600 gr/m2
2.4 – 9.5 oz/plant
XL
31 – 47 inches
9 – 10 weeks
Sativa 45%/Indica 55%

Customer reviews

4.8 of 5
181 customer ratings
5 stars
85%
4 stars
10%
3 stars
2%
2 stars
2%
1 star
1%

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F
Faulds
Created 23 July 2022
A truly unique flavor
I can compare it to a lot of strains I have grown but it’s not quite the same. It has something that makes it unlike any other. The main aroma is fruity but when you keep inhaling you start to notice smells of cream and and some sweet candy that I seem to know from somewhere but can’t quite place. In short it’s unbelievable and makes Forbidden Runtz the best smelling strain I’ve had.
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B
Brent
Created 12 April 2021
gonna be dank
I'm 6 weeks in, and I believe they will be finished in about 3 weeks. They already smell fantastic, like sweet and tart candy. looking forward to the smoke .
5 people found this helpful
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O
Oniel
Created 12 April 2021
get a carbon filter
Smell is stroooooong, dank and very sweet. invest in something to hide the smell if you need to be discreet.
4 people found this helpful
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K
King83Kong
Created 19 March 2024
Amazing genetics
never had problems with fastbuds Thanks guys
3 people found this helpful
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R
Roger
Created 14 February 2023
a must grow
100% germination on the seed .Five stars.!! An absolute pleasure to grow! Grows big huge dense sticky buds that are just gorgeous to look at ! Overall a very easy grow.. about 88 days from seed to harvest a must grow!! thank you fast buds!
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T
Tonic
Created 12 April 2021
drooling by the smell
Just about to chop 2 of these babies. my whole grow space smells like a candy shop.
3 people found this helpful
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J
Jake
Created 3 July 2024
The auto that never autoed
Planted 4/7 popped 4/8. It's still going. Outdoors now though.
2 people found this helpful
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H
Hawkbo
Created 14 April 2021
tested these
Grown in 2 gallon pot, smells incredible. Heavy citrus scents. Strong stalk and uniform bud structure.
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T
tderby
Created 11 November 2024
Compact
The two plants I grew were smaller than most autos I’ve grown. The buds were dense and had a unique smell that makes them worth growing. One of the seeds I got was visibly smaller than the other two and had a strange shape. As predicted, that seed would not sink in a glass of water after 24 hours and did not sprout in a paper towel. I understand that not every seed sprouts but at $15 a seed, they should at least be fully formed.
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M
Moony Grows
Created 8 November 2023
Insane yields and smells
These girls were average weight about 8 ounce of dry weight between 2 plants. The smells were off the charts though! Like a bucket of sweets/candy almost sickly sweet it was that strong hehe. Smoke was decent too, not overpowering, can easily be an all day smoke and get stuff done. Full grow series is available on YouTube.
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Forbidden Runtz Auto
Forbidden Runtz Auto' pack backside
Forbidden Runtz Auto
Forbidden Runtz Auto' pack frontside

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Customer questions & answers

I'm about to finish my first grow. Do you have any tips on harvesting? I don't want to mess it up
Hello, during the last week of flowering you should keep an eye on the color of the trichomes, you should harvest when the majority are cloudy or milky.
genetics?
Hello, this is a cross between our Forbidden Fruit, Runtz phenotypes, and our own autoflowering genetics.
What are the ideal temperatures to grow sativa's in?
Hello, as long as you keep the temperatures between 15-25°C your plant will grow weel but Sativas prefer a slightly hotter environment so it would be better to keep the temperatures around 23°C.
How about topping? Will she be good?
Yes, you can get great results by topping your plant but it's more recommended if you have a bit of experience growing autos because your plant can get stressed so make sure you do it carefully to avoid stunting growth.
Should I go heavy on the nutes as the nugs are gonna be huge and dence ?
Hello. No, feeding a strong nutrient solution will probably burn your plant so you should start with a low nutrient dose and gradually increase it.
How may forbidden runtz can I grow in a 2.4x1.2x2m tent?
Hello, it will depend on the pot size. If you're growing in 12L pots which is what we recommend you should be able to grow around 4-6 plants depending on the type of training you'll be performing. If you prefer growing in smaller pots (around 5-8L) it's possible to fit 8-10 plants.
Is it better to use LEDs or HPS?
Hello, it depends on the growing conditions, as long as you keep them in between the acceptable range you will get very good results with any light fixture.
How do you flush the plant
Hello. Flushing consists of watering with plain water until you get 20-30% runoff anywhere from 2-6 times before harvest. Thanks for asking.
I’m growing forbidden runtz in a 3x3x5 tent with a SF-1000 light(with the knobs) what wattage should i have the light at to grow in the flowering stage?
Hello, thanks for asking. You should follow the manufacturers recommendations but with autoflowers it's recommended to leave the light a bit higher than usual to encourage stretching, having the lights too close will cause your plants to remain short.
What is the minimum ground temperature to plant runtz auto outdoors? (How cold tolerant)
Hello, it depends on the overall conditions but we recommend a temperature range between 15-25 celsius. Thanks for asking.
What light cycle I should use for Forbidden Runtz Auto?
Hello, we recommend growing our autos under 18/6 or 20/4 light cycle. Thanks for asking!
Hi never growing auto flower. So when do you switch the light hours from veg to flower?
Hello, thanks for asking. Autoflowers grow under the same light cycle from seed to harvest so there's no need to change the light cycle, you can grow them under 18/6 or 20/4 from seed to harvest.
Can you high stress train (for example: fimming) this auto along side scrogging? Or is it too much stress to recover in time?
Thanks for asking. As long as your plant is healthy and the growing conditions are on point you can perform any plant training techniques, just make sure you do it gently.
I am a 100% disabled vet and am desperate for some pain relief and sleep. Recommendations (autoflower) would be really appreciated. Thank you.
Hello, thanks for asking. The effects can vary from person to person but in your case make sure to take a look at our Afghan Kush, Chemdawg, Og Kush, Northern Lights and Rhino Ryder.
I'm looking a strain for a beginner smoker and sensitive people. Other than CBD , Greencrack.
Hello, please send an email with more information to [email protected] and we'll be happy to help you out.
Does a 40 w light of any type(led,cfl,etc.) affects positively when growing outdoors and just use the light to make a bigger light cycle?
Hello, thanks for asking. With a 40w LED you will be able to provide a longer light cycle but 40w may not be enough for your plant to grow as it should so its recommended you provide at least 75w so it doesn't affect plant growth.
How much are they.and how many you get in a pouch
Hello, thanks for asking. At the top of each strain page you'll find the prices and different sized packs.
Are there any US vendors that carry these new strains?
Hello, thanks for asking. Our US distributors should have them in the following 2-3 weeks, you can see a list of our US distributors here: 2fast4buds.com/distributors/us.
How many forbidden runtz can I fit in a 40x40x160 cm tent?
Hello, our Forbidden Runtz Auto grows quite tall so in a 40x40x160 tent you should only grow 1 plant at a time.

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