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Grapefruit Auto

A Fruity Phatty That’s Already a Legend!
Pack
1
fem
9,00 €
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  • Genetics: Crocket´s Tangie x Fast Buds Auto #1.
  • Seed Type: F5 Feminized Autoflower.
  • Foolproof. A low maintenance genetic, super easy to grow.
  • Grow in cold! A highly reliable plant that grows well even in cold and wet climates.
  • Expect the best. In just 70 days you’ll be rewarded with 600gr/m2 of top-shelf buds, hard to beat it.
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Tech Radar

Grapefruit 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 Bittersweet, Floral, Fruits, Grapefruit
THC Up to 20%
CBD < 1%
Harvest EU Indoor 400 – 550 gr/m2
Harvest US Indoor 1.3 – 1.8 oz/ft2
Harvest EU Outdoor 50 – 250 gr/plant
Harvest US Outdoor 2 – 9 oz/plant
Size XL
Height 80 – 120 cm
Height US 31 – 47 inches
Flowering 9 – 10 weeks
Room Indoor/Outdoor/Greenhouse/Mixlight
Gender 100% Female
Genes Hybrid
Genes Sativa 50%/Indica 50%
Genetics Crocket´s Tangie x Fast Buds Auto #1
Seed Type F5 Feminized Autoflower

Genetic tree

Grapefruit Auto
Tangie
Skunk 1
Acapulco Gold
Afghani
Colombian Gold
California Orange
Fast Buds Auto #1
Lowryder #1
Northern Lights
Willy's Wonder
Ruderalis
Fast Bud Auto
NYC Diesel
Ruderalis
Genetic tree — Grapefruit Auto. Source: GrowDiaries.com

Description

A large producing, autoflowering hybrid with a very special and unique grapefruit aftertaste. Flavor chasers will love this strain, as she is easy to grow and ideal for beginner growers. Potent with THC levels testing at 20% and a very generous producer, meaning commercial growers will enjoy working with this strain. Thanks to her high resistance and rapid growth, she can be planted outdoors multiple times a year, without suffering from mold or mildew during the wetter season. Hash makers and extract artists will find Grapefruit Auto to be a very worthy strain and can produce some sensational extracts.

Original Grapefruit Auto is a balanced autoflower developed to highlight classic grapefruit flavor while delivering reliable resin production and compact growth. This hybrid was selected for its consistency, fast cycle, and ability to translate bright citrus notes into extract-grade resin in an easy-to-manage format.

Plants stay compact at 80-120 cm, forming a short, stocky structure with elongated, dense buds stacked tightly along the branches. Flowers finish heavily coated in trichomes with vibrant orange pistils, offering strong bag appeal and efficient processing. Indoor yields reach 400-550 g/m², with outdoor plants producing up to 250 g per plant when grown under good conditions.

Flavor is fresh and bittersweet, combining grapefruit citrus, light florals, and earthy undertones. With THC levels up to 20% and consistent resin coverage across buds and sugar leaf, Original Grapefruit Auto performs especially well for extractions, producing clean, aromatic concentrates that retain its distinctive citrus profile.

Grapefruit Auto is a great option for growers and processors looking for daytime-friendly effects, bright citrus flavors, and dependable resin output in a compact autoflower suited for both flower and concentrate production.

Packaging

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

Effects

Relaxed Relaxed
50% of people reported feeling Relaxed
Happy Happy
38% of people reported feeling Happy
Energetic Energetic
30% of people reported feeling Energetic
Uplifted Uplifted
30% of people reported feeling Uplifted
Giggly Giggly
26% of people reported feeling Giggly
Hungry Hungry
25% of people reported feeling Hungry
Creative Creative
23% of people reported feeling Creative
Sleepy Sleepy
17% of people reported feeling Sleepy
Talkative Talkative
12% of people reported feeling Talkative

Customer reviews

4.8 of 5
42 customer ratings
5 stars
86%
4 stars
12%
3 stars
2%
2 stars
0%
1 star
0%

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V
Valero. Verified customer
Created 27 January 2020
Different phenos
I grew 2 at the same time and they look quite different.
4 people found this helpful
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S
Steve_Austin
Created 16 November 2016
Monster!
I´m going to chop it now
3 people found this helpful
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N
neorik
Created 18 September 2016
73 days finish.
Rhyno Ryder, Californian Snow, Grapefruit, West Coast OG, 73 days finish Grapefruit .35,39,50,55,61 days photonoted weak resistance to pests street, caterpillars and mites. (Not helping drug treatment), otherwise the quality 4+
3 people found this helpful
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P
Pisa420
Created 16 January 2021
Autoflower version is way better
I've already grown the regular Grapefruit and the Fast Buds autoflower version outperformed it in every way. 1. The autoflower version was ready 22 days earlier 2. The taste is much better 3. 33g more yield per plant
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M
Moreynis
Created 29 November 2018
nice genetics
nicely done genetics with very few drawbacksrecommended
2 people found this helpful
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A
angiekathe
Created 9 September 2015
Fruity and spicy smell.
All five seeds germinated after 24 hours. Rapid growth at the beginning. Outdoor for 60 days at a good location with over 6 hours/day of direct sun, good potting soil and some feeding. Grown 3x60cm and 2x90cm.
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T
Tom
Created 17 August 2015
this is the most fruity sour smoke
this has realy got my attention as I realy dig a fruity sour smoke. u got any other strains like this?
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B
BigSam
Created 20 September 2022
Grapefruit
Definitely in my top 5 of all time strains. This example from FastBuds is a must try even if you don't particularly like grapefruit the fruit. Very easy to grow, very forgiving & durable & the taste & smell? Try it & you'll see why I rate it so highly, literally.
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M
MarlonSP
Created 16 January 2021
Outdoor Monster
I grew Grapefruit Auto outdoors in Spain. 147g from one plant in 76 days!
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R
Riki
Created 5 November 2020
Grapefruit
I wasn’t sure what to expect from this strain, but it exceeded my expectations. An amazing variety to grow, I’m thrilled I tried it. Very strong resistance to the elements and diseases. Beautiful strong aroma of tangy-sweet Grapefruit! Delicious..
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Grapefruit Auto
Grapefruit Auto' pack backside
Grapefruit Auto
Grapefruit Auto' pack frontside

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Customer questions & answers

Hey fastbuds! I wanna grow 2 strains side by side (OG and Grapefruit) in a 33" x 25" x 74" (6sqft) tent under 250w HPS. How much plants do you recommend? Cant wait to try your seeds! cheers
Hi, Errday! thanks for asking!Well, it depends on your light power and on the size and the shape you wanna get. More than 8 would be too much maybe.Hope it helps a bit! Keep us updated :)Thanks!