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Gorilla Zkittlez Auto Cannabis Strain Week-by-Week Guide

02 January 2023
Learn how to grow the autoflowering Gorilla Zkittlez indoors and what her timeline is week by week.
02 January 2023
12 min read
Gorilla Zkittlez Auto Cannabis Strain Week-by-Week Guide

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  • 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 Zkittlez Auto is the perfect strain for those who have previously fallen in love with Gorilla genetics and its terrific potency and resin production but want to see if this power could maybe go along with new and interesting flavors. In our Gorilla Zkittlez Auto week-by-week guide, we describe the art of growing one such new hybrid and show that it is in fact no downgrade from the original and maybe even an improvement.

1. Grow Specifications

With her 70% Indica / 30% Sativa composition, Gorilla Zkittlez Auto is a strong and vigorous hybrid that is short and sturdy, with tight internodes and big and dense colas. Her height stays within 100–150 cm (39–60 inches), but the side branches have the tendency to grow long, competing with the central cola which allows this auto to achieve spectacular yields of 550–650 gr/m2 (1.8–2.1 oz/ft2) indoors. Outdoors, the yield potential varies wildly depending on the climate conditions but is equally generous at 50–350 gr/plant (2–12 oz/plant).

Gorilla Zkittlez Auto cannabis strain: data sheet

Gorilla Zkittlez Auto data sheet.

The trichome production is just as amazing as the buds and sugar leaves get completely obscured by trichomes that pack up to 27% THC and are bursting with terpenes. The buds give off a unique blend of old-school cannabis stench and fresh fruity aromas while the taste is like a citrus explosion on your palate.

2. Grow Set Up

Despite being a new, innovative hybrid, Gorilla Zkittlez Auto is prominent on Growdiaries with a couple of dozens of finished reports. We chose one where the grower uses coco as the growing medium as we thought it was the most instructive – coco is relatively easy to master even for a beginner grower and it ensures spectacular results. It's certainly a medium that can (and did) unlock the potential of our Gorilla Zkittlez autoflower.

Gorilla Zkittlez Auto cannabis strain: setup and grow specifications

Gorilla Zkittlez Auto setup and grow specifications.

3. Germination And Seedling Stage | Week 1

To ensure your grow's success from day one, you need to perform the germination just right so that the seed doesn't waste the precious energy resources stored inside it on dealing with subpar conditions. It's no rocket science btw – there are dozens of good germination practices, and any of them will work fine.


Plant Height:2.5 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:25 °CpH:6.5
Night Temp:19 °CSmell:None

Week 1 grow conditions.

In this case, the Gorilla Zkittlez Auto seed was germinated between wet paper towels and, as soon as the taproot was long enough (about half an inch, or 1 cm), transferred directly into a pot filled with a coco/perlite mix. The seed is inserted taproot-first into a small hole in the coco and covered with about a quarter of an inch of the loose and moist medium. The only thing that you should take care of after that, that is before your sprout appears, is to not let the medium dry out. The growing roots will definitely need some moisture, and it will also make the seed hull softer so the seedling will probably shed it on its own.

Gorilla Zkittlez Auto cannabis strain: germination and seedling stage | week 1

When a seed sheds a hull on its own, it's in for a vigorous start.

The grower used a 70/30 coco/perlite mix which is the golden standard for cannabis cultivation. While coco is good at retaining water, perlite keeps enough oxygen in the medium for the roots not to suffocate. Of course, you can play around, going to either side of the standard 70/30 ratio, and see what works for you and your girls best.

4. Early Veg | Week 2

The seedling stage is the most vulnerable in the life cycle of a cannabis plant, so if you want to help the little one grow and raise her chances of survival, make sure you keep the environmental conditions at optimal levels.

The most important one is the daytime temperature. If you can keep it at around 25°C (77°F) through all of the growing and flowering stages, it's great although the young plants prefer temps a couple of degrees warmer than that. The correct relative humidity also contributes to the plant's health and growth rates. It should be somewhere between 35%-65% for the whole of the life cycle, and again young plants prefer higher RH. If you fail to raise it in the whole grow tent, use a humidity dome to make things humid at least locally.


Plant Height:5 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:25 °CpH:6.5
Night Temp:19 °CSmell:None

Week 2 grow conditions.

Another important thing is the right distance between the lights and the seedling. Make it too close and the plant will slow down its progress. Keep the lights too far and it will stretch to an unhealthy degree and look flimsy. As you can see in the photo below, Gorilla Zkittlez Auto received just the right amount of light and looked compact but well-grown. You can easily tell that your girl is doing fine if each new pair of leaves grows to be bigger than the previous one.

Gorilla Zkittlez Auto cannabis strain: early veg | week 2

When fed right, weed plants in coco grow explosively right from the start.

The grower planted his Gorilla Zkittlez Auto seed right in her final 5-gallon (19-liter) container. This may present some issues with watering as it's quite difficult to calculate just the right amount for such a small plant in such a big pot. On the other hand, you won't have to deal with re-potting your autoflower later on, possibly shocking and stunting it in the process.

Also, when growing in coco, be sure to add some nutrients to your water practically from day one as the seedling will soon run out of its inner resources – those that have been stored inside the seed – and will rely on you with feeding. In this case, the grower went one step further and also foliar-fed his Gorilla Zkittlez. (You can see the spots of residue on the leaves.) Foliar feeding is a great way to quickly satisfy the plant's needs when you see some deficiency, but some gardeners use this technique on a regular basis to boost growth.

5. Mid Veg | Weeks 3-4

The second half of the first month from seed is all about active growth above ground. By this time, the autoflower has developed a large and extensive root system and now uses it as the foundation for the explosive growth of leaves and side branches. This part of the vegetative stage is also the perfect time to start training your weed giving the canopy the shape you want. The goal here is to make the plants as compact as possible so that they don't spend extra energy on transporting water and nutrients to the growing points. The other goal is to keep the tops at the same distance from light so that there's no contrast between huge colas above and fluffy little 'popcorns' below.


Plant Height:10-20 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:25 °C ↘ 24 °CpH:6.5
Night Temp:19 °CSmell:None ↗ Normal

Weeks 3-4 grow conditions.

As you can see in the pictures, the grower chose the most basic tie-down method (which is actually all one needs to get amazing results at harvest). We should add that most growers start to train their autos sooner than that because, by the end of the first month, most of them will enter the budding stage.

Gorilla Zkittlez Auto cannabis strain: mid veg | weeks 3-4

You should begin low-stress training as soon as the plant enters the stage of rapid vegetative growth.

As we mentioned earlier. in coco, you need to start feeding your plants right away. The first thing you'll give them is some kind of a Cal-Mag product as calcium and magnesium are essential for coco cultivation. Most growers even pre-treat their medium with a cal-mag supplement BEFORE planting their seeds and continue to use one throughout the whole cycle.

If you grow your marijuana organically, you'll also need to inoculate the medium with beneficial micro-organisms, such as bacteria and fungi. These little critters will later use the fertilizers that you'll be giving your plants and transform them into a more digestible form. And, of course, you can't do without some proper plant food either.

Gorilla Zkittlez Auto cannabis strain: veg nutrient schedule

Gorilla Zkittlez Auto nutrient schedule during the vegetative phase.

There are dozens of nutrient lines on the market that work great for cannabis, and some have been formulated specifically for coco. Bear in mind that, in the vegetative stage, you'll need an NPK product that's heavier on nitrogen (N) than phosphorus (P) and potassium (K) – those will come in handy during the flowering stage. Moreover, weed needs some essential microelements too, and it needs them from seed to harvest.  

6. Transition (Pre-Flower) | Week 5

The beauty of autoflowers is that they wrap up their vegetative growth and commence flowering automatically. It means that you won't have to change the light schedule to make them flower. Most growers choose the standard 18/6 schedule from seed to harvest as was the case with this Gorilla Zkittlez Auto. Others experiment with 19/5, 20/4, or even 24/0 – it all depends on how your particular strain reacts to these schedules. For some, a few hours of nighttime is a requirement. Others will even flower if you never turn your lights off, and the more hours of light they receive the higher their yield potential.


Plant Height:25 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:24 °CpH:6.5
Night Temp:19 °CSmell:Normal

Week 5 grow conditions.

You'll notice your marijuana transitioning to flowering by looking at the nodes – where leaves and side branches are attached to the main stalk. If you look closely enough, you'll see pairs of tiny hairs emerging. A few days later, you'll also notice the tops change their color – from a uniform green to a lighter shade, sometimes even yellowish – and then you'll see the same female hairs as at the nodes but growing in clumps on tops. These are the future buds forming.

Gorilla Zkittlez Auto cannabis strain: transition (pre-flower) | week 5

As all true autoflowers, Gorilla Zkittlez Auto starts budding under any light schedule.

Somewhere at this point in the timeline, you'll want to change your feeding schedule to the one that is more appropriate for the flowering stage, meaning more P and K and less N. Some gardeners do it when they see the first flowers emerge, others give the plants a week or two to finish stretching first, still others change the nutrient regimen preventatively. We recommend the first option, but see what works for you best.

7. Early Flower | Weeks 6-7

The most noticeable change in the early flower is probably not even the growth of future buds at every top and lower node but the elongation of the main stem and the side branches. This is called the flowering stretch, and it's something that catches many first-time growers completely by surprise. In photoperiod genetics, it can lead to serious problems as beginners tend to let them grow too big and leave no vertical space left for the stretch. Autoflowers start the budding automatically, so there's no such issue.

Nevertheless, look in the table below at how much the height of Gorilla Zkittlez Auto changed over these two weeks. You can let your ladies stretch into the light as they're now mature enough to handle extra light or you can keep raising the lights to keep it at a safer distance. Look at what the manufacturer of your LED says about its optimal range.


Plant Height:25-61 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:24 °CpH:6.5
Night Temp:19 °CSmell:Normal

Weeks 6-7 grow conditions.

Though the buds are forming full-steam now, the smell isn't overwhelming yet – it will become strong once the first trichomes appear. In flower, the temps shouldn't be too high (this will help to slow down the evaporation of terpenes and the degradation of THC and other cannabinoids). You can also start to decrease the relative humidity. However, that will be really important later – when the colas grow big and dense and there's more risk of mold and other fungal infections, such as bud rot and powdery mildew.

Gorilla Zkittlez Auto cannabis strain: early flower | weeks 6-7

The first weeks of the flowering stage are as much about stretching as budding.

At this point, many growers introduce different products called bloom boosters. They are supposed to speed up the process, make flowers fatter, and facilitate greater production of psychoactive and aromatic substances. You can experiment with these products if you like but keep in mind that they aren't strictly necessary and that their use shouldn't raise the overall concentration of the nutrient solution or you risk seeing the symptoms of nute burn.

Gorilla Zkittlez Auto cannabis strain: flower nutrient schedule

Gorilla Zkittlez Auto nutrient schedule during the flowering stage.

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

This is probably the most rewarding and calm time in the life cycle of an autoflower. By this time, even the most inexperienced gardeners establish a working relationship with their plants, learn to control the environment, and understand their ladies' needs. They, on their part, stop stretching and channel all their energy into stacking up their flowers and filling them out. They'll also profit from some kind of a PK-booster (there're a lot of these products on the market) and will probably be the thirstiest.


Plant Height:61-71 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:24 °CpH:6.5
Night Temp:19 °CSmell:Strong

Weeks 8-9 grow conditions.

Besides gaining weight, the colas will also get covered in trichomes now. It's these trichomes, or trichs, that store in them the bulk of THC and terpenes. As you can see in the pics below, Gorilla Zkitlez is an exceptionally frosty strain which augurs huge potency and a rich terpene profile. The flip side is that all those terpenes start to really stink up your place so you'll need your carbon filter installed and running, even for a single plant.

Gorilla Zkittlez Auto cannabis strain: mid flower (bulk phase) | weeks 8-9

As soon as the first trichomes appear, weed plants start to give off a strong smell.

The frost will cover not only calyces but the little leaves as well. (We call them 'sugar leaves'.) At the same time, some of the pistils that were greenish-white before will wither and turn amber. It's the first sign that your grow cycle is nearing its end and the buds are starting to mature.

9. Ripening And Harvest | Weeks 10-12

In the last weeks leading to the harvest, the less experienced grower may think that since the buds don't grow visually bigger anymore, it's time to harvest them. However, that's a mistake. Besides gaining some serious weight in the last couple of weeks due to an increase in density, the buds also continue to store up THC as well as other cannabinoids and terpenes. At some point, the amount of those reaches a peak, and your job is not to miss the perfect moment for the harvest.


Plant Height:71 cmHumidity:65%
Distance to Light:61 cmWater per Day:0.5 gal (1.9 L)
Day Temp:24 °CpH:6.5
Night Temp:19 °CSmell:Strong

Weeks 10-12 grow conditions.

There are several ways to determine whether your buds are ready to be harvested. The least accurate one is to take for granted the characteristics, including the flowering time, given by the seed breeder. Most seed shops now give accurate info, but the figures are only average, and there's always room for genetic variation. Another, a little more accurate method is to look at the pistils: if any of them are still white, it's probably too early; if all of them are withered and brown, the buds are more or less mature. Finally, there's the only reliable method of determining the peak maturity, and it's watching the color of trichomes under a microscope.

Take a 60x jeweler's loupe and inspect the trichomes. If they're clear, the THC levels haven't yet reached a peak. If they're all cloudy/milky, they contain the most amount of THC. If they start to turn amber, the THC in them has begun to degrade into cannabinol (which is more sedating than psychoactive).

Gorilla Zkittlez Auto cannabis strain: ripening and harvest | weeks 10-12

This Gorilla Zkittlez Auto has big, dense, and trichome-laden buds.

While watching the trichs, don't forget that you'll need to stop feeding your autoflower several days before the harvest and give them only fresh water. It's called the final flush. In hydroponics and coco, one week of flushing is enough, but when you cultivate weed in soil, flush for two weeks. The meaning of this procedure is to wash all built-up nutrients out of the medium and to make the plants starve and use up some of their internal resources, including chlorophyll. Chlorophyll is what gives your buds an unpleasant smell and taste of hay, and a long flush facilitates getting rid of it (which process is later finished by proper drying and curing).

10. Yield and Smoke Report

Despite using only a 100W LED, the grower managed to harvest 171 g (6 ounces) from his single Gorilla Zkittlez Auto. There's a benchmark for indoor growers – one gram of dry bud per every watt used – and this is what every ambitious gardener strives for. In this case, it was 1.71 g/W which is amazing.

Gorilla Zkittlez Auto cannabis strain: yield and smoke report

Even when bone-dry, the Gorilla Zkittlez Auto nuggets seem wet and sticky from all that resin.

Besides being so generous, the harvest was also top-notch in quality. The buds were super frosty, smelled strongly of sweet berries and fruits, and produced effects of prolonged euphoric relaxation, most suitable for nighttime use.

I have to say this is a premium strain. Amazing flavor, dense, and burns great! I do prefer to consume this strain during the evening..


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

Gorilla Zkittlez Auto terpene profile.

11. In Conclusion

Based on this grow report, Gorilla Zkittlez Auto is a strain that does amazingly indoors. Using coco as a medium and a LED light (even a relatively weak one) results in a plant that, while compact, is insanely high-yielding as it produces a fat and dense cola on each of its many branches. The buds are also completely covered in resin, giving away their Gorilla heritage. At the same time, the flavor profile is nothing like the traditional Gorilla. It's fruity and sweet. It's a great cultivar for harvesting top-shelf product in record-breaking amounts. Happy growing!