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Gorilla Glue Auto Cannabis Strain Week-by-Week Guide

We’ve found a Gorilla Glue Auto grow report that shows how to cultivate this autoflower week by week the easy way.
15 June 2022
12 min read
Gorilla Glue Auto Cannabis Strain Week-by-Week Guide

  • 1. Grow specifications
  • 2. Grow set up
  • 3. Germination and seedling stage | week 1
  • 4. Early veg | week 2
  • 5. Mid veg | weeks 3-4
  • 6. Transition (pre-flower) | week 5
  • 7. Early flower | weeks 6-7
  • 8. Mid flower (bulk phase) | weeks 8-9
  • 9. Ripening and harvest | weeks 10-12
  • 10. Yield and smoke report
  • 11. In conclusion

Gorilla Glue Auto is the ultimate resin-producing machine and the standard against which every new arrival is measured. The name reflects both the strain’s stickiness and its enormous power when it comes to effect. While any first-timer can grow her, not everyone can handle this weed’s potency – thanks to the high THC content, the smoke melts your face and feels like roaring fire behind your eyes.

At the same time, the effect is very cerebral and lets you move, uplifted and happy, through the longest to-do list. Of course, if you don’t overindulge because even an extra toke can make you motionless – filled with bliss but unable to unglue yourself from the couch.

In our week-by-week growing guide, we’ll show you how to grow this fantastic plant in your home garden the easy way. Based on an indoor coco grow journal, our report follows Gorilla Glue Auto progress through all grow stages and highlights important points throughout her life cycle. Hope you glean enough tips and tricks from it to grow your own GG to perfection.

1. Grow Specifications

Gorilla Glue Auto has a slight Sativa dominance – 65% Sativa vs 35% Indica – however, this doesn’t necessarily translate into above-average height. Plants rather tend to stay short, ranging from 60 to 130 cm (24–51 inches), especially indoors. Outdoor plants – when they have all the space they need and receive lots of sunshine – have the potential to get big and insanely productive at 70-350 gr (3–12 oz) per plant. Indoor cultivation ensures equally XXL yields of 450–600 gr/m2 (1.5–2 oz/ft2).

The production of resin is legendary so that in 9–10 weeks from seeds you’ll harvest buds that are incredibly sticky and pack a hefty 24% THC. Besides her frosty appearance and hard-hitting potency, Gorilla Glue Auto is famous for her complex terpene profile which is quite different from most sweet and fruity varieties. It’s dominated by a strong smell of pine forest, with gassy and lemony notes and some peppery bitterness on the palate. This is the kind of flavor that keeps you guessing and makes inhaling the smoke so much fun.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Datasheet

Gorilla Glue Auto datasheet.

2. Grow Set Up

Gorilla Glue Auto is an insanely popular strain with literary hundreds of grow reports available online. We’ve chosen for you one that shows how to cultivate this weed using the simplest methods.

The gardener with the nickname Chimken cultivates his autoflowers indoors, in a 4x2 Secret Jardin grow tent. Its oblong shape makes it perfect to keep 2-3 medium-size plants side by side. There were there in this garden – two Gorillas plus one Gelato Auto. As we shall see later, the Gelato which was the slower of the three in veg, grew enormous and started bullying the adjacent Gorilla. So, looking back, two and not three plants in the same area would have been just right.

The grower used a custom-made 400W LED quantum board with white and red diodes, a powerful extraction fan coupled with a carbon filter, an oscillating fan in one corner, and an air humidifier. The humidifier was necessary because the air tended to be too dry which is not good early in the grow cycle. The rest of the equipment was pretty standard.

What was NOT standard about the whole setup is that the guy chose not to water his plants manually but installed an automatic watering system. This GoGro irrigation system is of a passive kind – the water fills trays below the containers, and when the level is high enough, a valve closes and stays closed till the roots of the plant drink up some of the water. Then the valve opens again and lets some more water (or nutrient solution, to be more exact) from a reservoir go to the trays.


Grow Space:0.72 m2 (8 ft2)Pot Size:15 l (3.96 gal)
Seed to Harvest:12 weeksMedium:100% coco coir
Flowering:8 weeksNutrients:Synthetic
Light Cycle:18/6Day Temperature:26°C (79°F)
Light Type:LEDNight Temperature:23°C (73°F)
Watts Used:400Humidity:60% ↘ 48%

Gorilla Glue Auto setup and grow specifications.

3. Germination And Seedling Stage | Week 1

There are many efficient methods of germinating cannabis seeds, and the grower chose one of the simplest. He let the seeds float on the surface of the water in a glass until they cracked and grew taproots long enough to plant them in the medium.

It’s a good method, provided that you don’t let the seeds sink to the bottom or they could ‘drown’. The thing is that embryos inside the seed hull need some oxygen for their growth. If you deprive them of oxygen (in water) for many hours, they first lose their vigor and then die.


Plant Height:2.5“ (6 cm)Day Temp:79°F (26°C)
Distance to Light:23.5“ (60 cm)Night Temp:66°F (19°C)

Week 1 grow conditions.

The grower used a rather pricey option of germinating several seeds and choosing only half of them – those that are the strongest. It probably makes sense considering how much time, effort, and electricity you could spend on a runt.

After the seeds developed inch-long taproots, he placed them into jiffy plugs.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Seeds with long taproots floating on water surface in a glass and seedlings with long stalks and unshed hulls growing out of jiffy plugs

Seeds germinated on the surface of the water and sprouted in jiffy plugs.

If you like the glass-of-water method, please bear in mind the following things that will increase your chances of success: keep the glass in a dark place, keep the temperature around 25-26°C (77-79°F) for the best germination rates, and use plain dechlorinated water without any nutrients.

You can use rooting stimulants if you want, but they’re not necessary and increase the risk of a costly mistake. Some gardeners also add hydrogen peroxide (H2O2) to kill any chance infection on the surface of seeds (and give embryos some extra oxygen). You could use it too – by taking one part of 3% H2O2 from a pharmacy to five parts of water. Again, it’s not really necessary and may result in mistakes.

When seedlings grew the first pair of true leaves, the grower transplanted the jiffy plugs into the final 15-liter (3.96-gallon) containers filled with coco. Don’t mind the LEGOs in the photo below – they are just the guy’s personal idiosyncrasy and nothing more.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Three black plastic containers with coco in grow tent with very small marijuana seedlings in each of them and a air humidifier releasing a jet of vapor

Two Gorillas and one Gelato planted in coco with an automatic drip system.

4. Early Veg | Week 2

The first two weeks of cannabis grow cycles are usually rather slow, at least above ground. As for the roots, they develop like crazy, building a strong foundation for the rest of the life cycle. In hydroponic setups and coco (which is really a form of hydroponics), the growth is very noticeable and fast above ground too.

At this stage, your objective should be to find the optimal distance from the light and keep the conditions warm and humid. Look at the day and night temperatures in the table below – they are just about perfect. The relative humidity (RH) can be at 60-70% in the seedling stage because young plants love it. In later stages, you can lower a bit both the temps and the RH.


Plant Height:2“ (5 cm)Day Temp:79°F (26°C)
Distance to Light:31.5“ (80 cm)Night Temp:73°F (23°C)

Week 2 grow conditions.

In the second week, the growth was outstanding. This was probably due to a combination of factors, but we think that the main ones were the medium (coco) and the watering method (automatic wicker-style irrigation). Cannabis roots love oxygen, that’s why hydroponic setups are so effective – they give roots water all the time and air (with oxygen), also all the time. In wicker-type irrigation, the labor is also divided by different parts of the root system – while the lower part drinks water, the upper part absorbs oxygen.

The central Gorilla Glue Auto emerged as a leader in the race, the other Gorilla (on the right) was a little behind, and the Gelato on the left was the ‘loser’. But wait till the end of the run. Spoiler alert: the roles will exactly reverse.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Three 2-week-old seedlings, very big and well-developed for their age standing in plastic containers in a grow tent

Two of these are Gorillas, including the big girl in the center.

5. Mid Veg | Weeks 3-4

The second half of the first month is usually the time when cannabis starts to change daily – with new leaves and new side growth appearing all the time. Strangely, it wasn’t the case in this grow. Probably because the girls received very moderate doses of nutrients while their appetites were increasing.

Mid-veg is also the point in the timeline when most gardeners begin to train their plants – trying to control their height and make central colas and side branches more uniform in size. But this particular gardener used a tall enough tent and a very powerful light so he decided to grow his girls without either LST or HST. When there’s enough light, it can penetrate deep down, and so there’s no need to keep the plants short and flat.


Plant Height:6-12“ (15-30 cm)Day Temp:79°F (26°C)
Distance to Light:27.5“ (70 cm)Night Temp:73°F (23°C)
Humidity:60%Smell:Weak → Normal

Weeks 3-4 grow conditions.

Noticing that the growth was slowing down, the guy upped the dose of nutrients in week 4. He used a singularly simple feeding schedule, with only one two-part product – Coco A & B by CANNA.

Cannabis needs three major macronutrients – nitrogen (N), phosphorus (P), and potassium (K) – a few lesser nutrients, such as magnesium, calcium, and iron, and several miсronutrients. CANNA Coco A & B has them all, and as is evident from its name, the exact ratio is specifically formulated for coco cultivation with its raised need for magnesium and calcium. And below, you can find the nutrient schedule for the complete life cycle (as it was used in this particular grow):


Nutrients, ml/l     Weeks 1-3Week 4Weeks 5-8Weeks 9-12
CANNA Coco A12.534
CANNA Coco B12.534

Gorilla Glue Auto feeding schedule from seed to harvest.

Of course, the modern market offers many other amazing products that contribute to the plants’ health, vigor, smell and taste, the amount of resin, etc. Most of them definitely do their job and make your grow more rewarding, but they’re not necessary, strictly speaking. Moreover, we encourage beginner growers to keep things as simple as possible because the fewer small decisions you have to make, the more you can focus on essentials.

And this grow is proof that keeping things simple leads to success.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Three healthy-looking young autoflowers growing in plastic pots in a grow tent

The progress is very paced now, but the explosive growth is about to begin.

The plants stayed short (probably because of the very powerful light) but began to develop nice side growth. All the grower had to do was change the solution in the nutrient reservoir. He used to do it once every two weeks but decided that it was too long and the solution was spoiling in the meantime. For this grow, he changed it once a week.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: A side view of two young marijuana plants, short and squat but with well-developed side branches

In the vegetative phase, not only the main stalk and fan leaves are growing, but the side branches as well.

The explosion in growth came in week 4 as the two GorillaGlue Auto girls began to stretch every side branch they had. They also showed sex which meant that the flowering time was about to begin.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Two big and health-looking autoflowers at the age of 4 weekds from seed, untrained but with many side branches

The period of striking overnight spurts in growth has begun.

6. Transition (Pre-Flower) | Week 5

The transition to flower and the early stages of budding are probably the most misunderstood time in the life cycle of cannabis because beginner growers expect the vegetative growth to stop completely. In reality, they watch in horror as their plants shoot up like rockets – to double or even triple in size over the next few weeks.


Plant Height:22“ (57 cm)Day Temp:79°F (26°C)
Distance to Light:27.5“ (70 cm)Night Temp:73°F (23°C)

Week 5 grow conditions.

When girls enter the pre-flowering stage (around the end of the first month for autoflowers), they still need a lot of nitrogen, so it’s too early to radically change their diet. They’ll benefit yet from some veg nutrients.

In this video, we explain the principles of feeding autoflowers.

The most evident development at this point in the timeline is the elongation of the main stalk and every side branch. The other thing that you will notice – the leaves on top will seem very light-green, almost yellowish, and they will grow very thin and dense. You may even wonder if these are leaves or first female hairs. In fact, it’s both – growing next to each other and forming what will soon become buds.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: The top view of a plant's apex that appears to be on the verge of flowering and two big indoor autoflowers in the preflowering stage

Left to right: Gelato and GG. The bud sites on top are just forming, but the stretch is going full steam.

7. Early Flower | Weeks 6-7

In early flower, cannabis continues with what is called the flowering stretch and begins to stack up flowers as they bulk up at the nodes and gradually fill in the spaces between the nodes. Around this time, the flowers and trim leaves get covered in trichomessticky resin glands full of aromas and THC.


Plant Height:30-37“ (75-95 cm)Day Temp:79°F (26°C)
Distance to Light:27.5“ (70 cm)Night Temp:73°F (23°C)

Weeks 6-7 grow conditions.

By this time, the grower tuned in the feeding dosage so that whatever small deficiencies have developed before, they were gone now and the ladies looked absolutely healthy and green.

This is the beauty of using nutrients specifically formulated for cannabis. You can try and use other fertilizers for other home plants but you’ll have to be on the alert constantly and closely monitor the pH and TDS of the nutrient solution because the imbalance in nutrients can cause lockouts and deficiencies.

This gardener didn’t even report watching pH, but he mentioned that his previous attempts resulted in failure while this run – with Gorilla Glue Auto and Gelato Auto – was a success from the beginning. This often happens with coco growers because the medium is rather unforgiving and requires getting used to. But once you master it, the results are phenomenal and far surpass anything you can hope to achieve in soil. We mean the speed of growth and the yields.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: A side view of two flowering ganja plants in a grow tent with stretchy branches and buds that start to stack up and a closeup of a bud with most pistils white but some purplish

It’s only the beginning of Gorilla Glue Autoflower flowering stages but they already look magnificent.

8. Mid Flower (Bulk Phase) | Weeks 8-9

Now that the plants have finished stretching and the buds are well stacked up and begin to fill out, it’s best to decrease the relative humidity to something like 35-40%. (In this grow, it was 48% for the rest of the flowering stages.) With lower humidity, you run a substantially lower risk of encountering either mold or bud rot.

Cannabis starts to smell at different stages of flowering depending on the genetics. With Gorilla Glue Auto, the strong smell appeared quite early.


Plant Height:41“ (105 cm)Day Temp:79°F (26°C)
Distance to Light:28↘14“ (70↘35 cm)Night Temp:73°F (23°C)

Weeks 8-9 grow conditions.

Gelato Auto turned out to be the ‘sleeper hit’ of this grow. She grew so big that she started to overcrowd her neighbors, and the bigger of the two Gorillas (the one in the center) suffered from this bullying. In the end, she would yield a bit less than the other one.

Other than that, both developed beautifully and lived up to their fame of being the most resinous autos ever. The gardener noted that he never had grown such sticky plants before.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: A grow tent with a LED quantum board, air ducts, a carbon filter, and an oscillating fan and three big autoflowers in the budding stage and a closeup of a bud that looks plump and frosty

4 weeks into flowering, Gelato has started to overcrowd the Gorillas, but their buds look more stunning by the day.

9. Ripening And Harvest | Weeks 10-12

When the harvest is approaching all you have to do is to continue with the feeding regime that you have fine-tuned by now and to watch for the right moment to start the pre-harvest flushing. You may also want to decrease the day temperature to something like 73°F (23°C) because flowering cannabis benefits from slightly lower temps.


Plant Height:41“ (105 cm)Day Temp:79°F (26°C)
Distance to Light:14“ (35 cm)Night Temp:73°F (23°C)

WeekS 10-12 grow conditions.

All growth had long stopped for both Gorilla Glue Autos, and they only kept increasing the size of the buds. As promised in the description, this strain turns purple in late flower, and this is exactly what happened to one of the girls.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: A closeup of a cannabis leaf that has faded on the eve of harvest, with yellow color in the middle and purple edges and a closeup of a perfectly mature frosty and purplish bud

When cannabis flowering stages come to an end, leaves and buds begin to fade beautifully

The grower didn’t mention any flushing, and judging by his feeding schedule, he kept feeding his plants till harvest, but it’s not the best strategy, especially for such tasty strains as Gorilla Glue. Flushing helps you remove the built-up salts from the plant tissues which makes the smoke much cleaner.

In hydroponic setups (including coco), one week of flushing is more than enough, and you need to buy a jeweler’s loupe (a 60x hand microscope) and start inspecting the trichomes when you notice the plants have begun to fade. When most of the trichomes have turned cloudy and only a few remain clear, start the flush. By the time, you end it, all of the trichs will have turned cloudy and there will be even a few amber ones as well. It means the buds are at the peak of their potency.

10. Yield and Smoke Report

At the end of the day, the grower achieved that Holy Grail of all indoor gardeners – the gram-per-watt yield. In particular, his two Gorilla Glue Auto ladies brought him 233 grams (8.22 oz) of trimmed dry bud.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Five mason jars with marijuana buds

Gorilla Glue Auto buds curing in jars.

The smoke with aromas of berries and herbs was hybrid in nature but with a slight Indica dominance – making the grower relaxed and happy – but also with enough cerebral side manifesting in bright creative ideas.

Gorilla Glue Auto Cannabis Strain Week-by-Week Guide: Terpene profile

Gorilla Glue Auto terpene profile.

11. In Conclusion

For the author of this Gorilla Glue Auto grow report, this was the first successful grow. He had botched all the previous attempts. It says a lot about the vigor and easy maintenance of the genetics. The plants also proved compact enough for an indoor grow although they were totally untrained.

They became very resinous early on and began to smell even before the first flowers appeared. Please keep this in mind and install a good carbon filter. The buds were of perfect texture – dense, frosty, and easy to trim. To conclude, by all means, try this marijuana variety if you need plants of moderate size and above-average yields of premium bud. Happy growing!

External References

  1. Kinetics of CBD, Δ 9 -THC Degradation and Cannabinol Formation in Cannabis Resin at Various Temperature and pH Conditions, Wuttichai Jaidee et al. June 2021
  2. Distribution of the principal cannabinoids within bars of compressed cannabis resin, Analytica Chimica Acta, May 2005


15 June 2022