If you’re a beginner, want to save time, and avoid using advanced growing techniques, autoflowering cannabis strains are worth considering.
Autoflowers, often called autos, transition from the vegetative stage to the flower stage without relying on any specific light cycle. They begin flowering quickly, which makes things faster and easier.
It makes sense to grow these seeds in Australia, where the bountiful sunshine allows autos to flourish, so you enjoy multiple harvests each year.
In this guide, we review seven of the best autoflower marijuana seeds worth your attention—starting with AK-47 Auto, a favourite hybrid among many Australian growers.
One of the coolest things about growing an autoflowering cannabis seed is that you can use careful manipulation of light schedules on the plant to induce flowering.
These auto plants are genetically engineered to grow rapidly into plants of compact size.
So whether your setup is outdoor or indoor, it requires minimal effort and expertise to succeed with these seeds.
No matter the strain you eventually pick from our top recommendations, you enjoy these benefits simply because you’re growing an autoflowering plant.
Faster growth cycle
Autoflower seeds germinate into weed plants that will automatically begin flowering after a certain period, usually within 2 to 4 weeks.
That way, you have a quicker harvest. It’s the perfect weed seed to grow if you want to harvest quickly.
Sustainability for various climates
Areas such as Sydney in Australia have Mediterranean-style climates all year round, translating to around 340 sunny days a year.
Other parts, like Cairns, have tropical weather with hot, sticky summers and mild, dry winters. So, the sunshine in most parts of the Down Under allows autos to flourish and reap rich rewards.
Beginner-friendly
Due to how simple the cultivation of autoflower seeds is, they are usually a fantastic choice for beginner growers.
Unlike regular strains, autos are more forgiving, especially regarding environmental factors (light exposure, temperature variations, and nutrient imbalances).
Choosing a highly-quality cannabis seed is the first important decision you have to make as you begin your cultivation journey.
Now that you’ve chosen to grow autoflowers, here is our review of the best auto weed seeds to consider:
Genetics | Sativa-dominant hybrid, |
THC | 21% |
Grow Difficulty | Easy |
Yield (Indoor/Outdoor) | 400-500 grams per m2/600-800 grams per plant. |
Growth cycle | 9-10 weeks (from seed to harvest) |
Ak-47 may sound drastic, but this Sativa-dominant hybrid is the perfect autoflower for beginner and experienced growers. It’s really no surprise that Ak-47 is a popular choice in the Australian 420 community.
After considering the potency, flavour and effect, yield, and ease of growing, we became convinced that no one can ever go wrong by choosing the Ak-47 autos.
Potency
The potency of the Ak-47 becomes clearer when you consider the THC content—typically ranging from 18-21%. This makes it a fairly potent strain.
This strain's lineage is quite mysterious, making it even more special.
What we do know is that Ak-47 is a product of sativa strains from Colombia, Mexico, and Thailand with indica influence from Afghanistan.
Flavor and Effects
The seeds grow into plants that deliver earthy, floral and citrus flavour buds. When you smoke the buds from the AK-47 auto weed plant, you first enjoy sweet and fruity notes.
The aromatic experience ends with a slightly sour aftertaste. And, the euphoric high is long-lasting but helps you ease off stress.
Yield
If you’re growing these seeds indoors, expect 400 to 500 grams per m2. Outdoor growers of this autoflowering strain usually achieve 600-800 grams per plant.
Flowering Time
Since we’re talking about autoflowering plants here, it’s relevant to indicate that AK-47 Auto completes its cycle from seed to harvest in approximately 9-10 weeks. So, this seed is a top pick if you want multiple growers per year.
Why Ak-47 Auto Seeds is a top pick
Cultivators of all levels will find these autoflower seeds easy to grow. But beyond that, the Ak-47 strain is truly special. If you’re in a region in Australia with shorter growing seasons or less consistent light conditions, look no further than the Ak-47.
Genetics | Indica-dominant hybrid |
THC | 25-30% |
Grow Difficulty | Easy |
Yield (Indoor/Outdoor) | 400-600 gr per m2/500-750 gr per plant |
Growth cycle | 8-10 weeks (from seed to harvest) |
When it comes to a highly potent autoflowering strain, Gorilla Glue #4 is a solid choice.
This indica-dominant hybrid promises to deliver buds that you will love. And this is quite assuring when you consider the original Gorilla Glue #4—a mix of Chem’s Sister, Sour Dubb, and Chocolate Diesel.
Potency
With a THC level going as high as 30%, the Gorilla Glue #4 is indeed a strong weed strain. (Who says autoflowers are less potent??)
The fresh, dense buds you will get from this weed plant will be best suited for experienced users with a high tolerance for THC.
Flavour and Effects
Putting a pin on the aromatic profile of Gorilla Glue #4 is tricky. When the autoflower plant grows into the flowering stage, your grow space will be permeated with earthy, piney, and sour aromas.
Even when you smoke the buds, these flavours come alive, ending with hints of chocolate and diesel.
The high THC content of this seed also means that it will produce buds with powerful and long-lasting highs. It’s an indica-dominant hybrid. So you can only expect the best of experience in that vein.
Yield
The yield of Gorilla Glue #4 during harvest is decent. Indoor cultivators should expect 400–600 gr per m2, and outdoors, this weed plant can deliver 500–750 gr per plant.
And, of course, you can ensure this by providing the autoflower with the right nutrient regimen and environment.
Flowering Time
In just 8 to 10 weeks, the Gorilla Glue #4 Auto completes its cycle from seed to harvest. It is among the fastest autoflowering options out there.
Why Gorilla Glue #4 Seed is a Top Pick
Growing autoflowers means you’re getting results quicker with minimal effort. And you don’t have to sacrifice strong potency for that.
If you’re more concerned about growing highly potent marijuana, Gorilla Glue #4 auto should be the seed you plant.
Genetics | Indica |
THC | 20% |
Grow Difficulty | Easy |
Yield (Indoor/Outdoor) | 350-400g per m2 / 80-120g per plant |
Flowering Time | 8-9 weeks (from seed to harvest) |
An autoflowering seed is a popular choice for beginners who want to avoid dealing with advanced growing techniques.
When it really comes down to beginner friendliness, only a few strains are as great as the Do-si-dos Auto.
It’s a purely indica weed from a cross between the original Do-Si-Dos and a ruderalis strain.
Potency
Do-si-dos auto marijuana seeds have a THC content of up to 20%, which is a hint that it is decently potent. So, the buds from this plant will deliver a long-lasting high that ends with deep relaxation to ease stress and tension.
Flavour and Effects
Late into the flowering stage, your grow tent will start having sweet notes of baked goods.
The fermented fruit undertones you taste when you smoke the buds from Do-si-dos are simply second to none. But this comes after the sweet, earthy Floral taste.
Many Do-si-dos marijuana fans praise the strain for its ability to induce happiness and relaxation.
Yield
With consistent environmental conditions, adequate nutrients, and lightning (more on this later), expect to achieve a yield of 350–400 g per m2 indoors.
The strain provides a moderate yield of 80–120 g per plant for outdoor growing.
Flowering Time
Do-Si-Do Autoflower typically completes its cycle from seed to harvest in approximately 8-10 weeks.
Why Do-si-dos Auto Seed is a Top Pick
An easy-to-grow cannabis strain for beginners is resilient, requires minimal care, can handle common mistakes, and thrives in different environments without needing complex nutrients. This is synonymous with the Do-si-dos autoflowering stain.
Of course, other seeds do well in those areas, but Do-si-dos auto seed is the best for beginners when push comes to shove.
Genetics | Hybrid |
THC | 22% |
Grow Difficulty | Easy |
Yield (Indoor/Outdoor) | 450-500 grammes per m2/200-500 g per plant. |
Flowering Time | 8-10 weeks (from seed to harvest) |
Another fantastic autoflowering seed you can grow in Australia is the famous Runtz, a product of two iconic strains: Zkittlez and Gelato #33.
Runtz’s terpene profile makes the strain a treat for the senses. What many fans love the most about growing the Runtz weed seed is the sweet candy aroma it delivers when fully grown.
Potency
A popular compliment to the Runtz strain is that it’s a mood booster. That is even true for this autoflowering variety, which has up to 22% THC content, making it a relatively strong weed plant to grow.
Flavour and Effects
The strain’s terpene profile boasts Beta-Caryophyllene, Linalool, and Limonene, contributing to the delicious mix of tropical fruit and sugary sweetness.
The seeds will grow into weed plants that deliver buds that offer a balanced blend of euphoria and relaxation.
Yield
With minimal tender love and care for your plant, the Runtz will deliver up to 450-500 grammes per m2 indoors. Outdoor growing yields around 200-500 g per plant in nine weeks.
200-500 inner-friendly strains, so you won’t have to go over and beyond to succeed.
Flowering Time
Runtz has a short vegetative phase, meaning you’ll enjoy your harvest in just over 70 days from seed to bud.
In other words, this sun-loving strain transitions from seedling to harvest in approximately 8-10 weeks.
Why Runtz Auto Seed is a top pick
It’s simple. If you’re interested in fuss-free, flavorful marijuana, Runtz Auto is your go-to choice.
Alt: Pine Autoflowering Cannabis Plant
Genetics | Sativa |
THC | 18% |
Grow Difficulty | Moderate |
Yield (Indoor/Outdoor) | 400-600 gr per m2/500-750 gr per plant |
Flowering Time | 8-10 weeks (from seed to harvest) |
The mood-elevating impact of consuming buds from the Pine auto cannabis plant is one feature that has made it a popular strain.
But the plant is also famous for its distinct piney aroma. We can’t pinpoint the lineage of this unique weed seed, but historians say it traces back to landrace sativa strains originating in South-east Asia.
Potency
While the THC content in this autoflowering weed seed is only 18%, the Pine strain is known for delivering an uplifting cerebral high that boosts energy, creativity, and focus.
Flavour and Effects
As the name suggests, expect to savour a blend of pine needles, earthy undertones, and subtle hints of citrous and spice when consuming buds from pine auto plants.
Since it’s a Sativa-dominant seed, expect it to produce buds that stimulate creativity and enhance mental clarity.
Yield
One thing about pine auto seeds is that you have more chances of higher yields when you grow outdoors.
Outdoor growers can achieve 400–600 gr per m2 yield, while indoor cultivators of this weed seed can look forward to a 500–750 gr per plant yield.
Meanwhile, this plant will grow tall and lanky, with long, thin leaves and ample spacing between nodes.
Flowering Time
In 9 to 11 weeks, the Pine Auto seeds would have developed from seedling to harvest stage. This makes it a fast-growing plant.
Meanwhile, these weed seeds would be best for someone who has successfully grown cannabis in the past.
Regular pruning and training techniques like topping or LST will be required to help control height and promote lateral branching.
Why Pine Auto Seed is a Top Pick
Growers, beginners or experienced, who want to harvest buds delivering a natural energy boost will find value in the Pine Auto marijuana seeds.
Genetics | Indica |
THC | 20% |
Grow Difficulty | Easy |
Yield (Indoor/Outdoor) | 500-5550 gr per m2/ 170-2220 gr per plant |
Flowering Time | 10-11 weeks (from seed to harvest) |
Another wonderful autoflowering seed you can consider growing is the Northern Lights, especially if you want to achieve many yields to crown your effort.
This strain has its roots in the iconic Northern Lights strain, adding a touch of Ruderalis magic that provides the autoflowering characteristics. There are many things to love about this autoflower weed seed. Let’s start with its potency.
Potency
The moderate THC content of Northern Lights autoflower seeds means that the buds will deliver a mellow high for calm effects. It’s a fairly potent strain.
However, you can maximise the potency by providing strong light, even though light schedules are not a concern.
Flavour and Effects
One interesting fact about Northern Lights is that it is easily recognisable, thanks to its flavour profile and aromatic attributes.
It delivers a smooth, earthy aroma with a bit of sweetness. As you smoke the buds, you may taste a little citrous or skunk.
Given its indica characteristics, the effect of the high translates to a mellow, full-body buzz.
Yield
With the little effort you’ll put into growing these autoflower seeds, you can expect a bountiful yield. It doesn’t matter if you’re growing indoors or outdoors..
Under the right conditions. Northern Lights autoflowering plants will give you 500-550 gr per m2 indoors and 170-220 gr per plant outdoors.
Flowering Time
As with most strains recommended in this guide, the Northern Lights auto is ideal for quick cultivation cycles. It moves from seed to harvest in about 10–11 weeks.
Why Northern Lights Auto Seed is a top pick
For those growers looking for a ticket to an abundant harvest, this is the right auto seed.
It doesn’t matter if you’re a seasoned pro or a beginner. Properly growing the Northern Lights is entirely rewarding. This is a high yielder.
Genetics | Indica-Dominant Hybrid |
THC | 23% |
Grow Difficulty | Easy |
Yield (Indoor/Outdoor) | 300g per m2/100g per plant |
Flowering Time | 8-10 weeks (from seed to harvest) |
With the autoflowering traits coming from Ruderalis, it is widely believed that the beautiful Grandaddy Purple originated from the classic Granddaddy Purple Urkle.
This cannabis autoflower weed seed has a lot to offer, and it doesn't wait till harvest to show you. You begin to see the visual satisfaction from the flowering stage.
Potency
Given the relatively low CBD level and 23% THC concentration, the Grandaddy Purple is undoubtedly a strongly potent weed strain.
Flavour and Effects
At some point, you will think all that this strain's flavour is is ripe berries—sweet grapes, blueberries, and hints of plum. But it also introduces a subtle earthiness that makes the buds aromatising.
Since it’s mostly an indica weed, expect that relaxing effect when you consume buds from this plant.
Yield
Expect a good harvest from growing the beautiful Grandaddy Purple auto seeds—up to 300 g/m2 indoors and up to 100 g per plant outdoors.
Remember that good indoor ventilation is key if you want to harvest bountiful, healthy buds.
Flowering Time
Unlike traditional strains, the Granddaddy Purple auto seeds go from seed to harvest in approximately 8-10 weeks.
Why Grandaddy Purple Auto Seed is a top pick
The deep purple hues of the Grandaddy Purple Auto strain have become a signature. It is simply a sight to behold.
If you gain a level of satisfaction gazing at beautiful weed plants as they progress from the veg to the flowering stage, the Grandaddy Purple auto seed should be your pick.
After buying your autoflower weed seeds, the first step is to germinate them before properly planting them into your grow medium.
The ideal conditions that help auto seeds germinate are:
Warmth (temperatures between 70°F and 80°F (21°C to 27°C).
Moisture (this is because water facilitates the germination of weed seeds, but the moist environment must not drench the seeds).
Air (the seeds will need oxygen for germination).
Now, a simple way to jump-start the germination of your seeds so they are ready for planting is by soaking them. Follow these steps:
Step 1: Start by filling a glass with lukewarm water.
Step 2: Gently put the autoflower seeds into the glass of water. There’s no particular order or interval. Simply add them to the water.
Step 3: Soak the seeds for 24 to 48 hours. Towards the end of this time frame, the seeds have cracked open, with a small root emerging. Do not let the seeds stay in water for more than 48 hours.
Step 4: Once you notice the small root emerging, gently remove the seeds and plant them in your grow medium.
No. Autoflower seeds are not less potent. The idea that growing autos will result in buds with less potency is a popular myth in the cannabis community.
Modern autoflowers, just as the ones we’ve recommended in this article, boast of significant cannabinoid profiles, which can be rich in THC and CBD just like their photoperiod counterparts.
Indeed, with photoperiod strains, you get more variety among high THC strains. But
If you prioritise potency, then you have to choose an autoflowering strain with high THC content. After that, when growing the plant, you want to exercise the best practices for nutrient management and environmental conditions to maximise the potency of the buds.
Autoflower plants grow quickly, usually finishing their life cycle in 8 to 10 weeks.
You must use a nutritional solution made specifically for autoflower strains. You also want to begin with a small amount of nutrients and slowly add more as the plants mature.
During the first two weeks after planting, all the plant needs is plain water. From week 3, you can start with 1/8-strength vegetative nutrients. Between weeks 4 and 5, gradually increase to 1/4 strength veg nutrients.
As the plant approaches the 6 and 7 weeks, flowering will begin. At this stage, you want to reduce vegetative nutrients to 1/8.
Although different growers have their preferences, most agree that autoflower plants thrive with 18 to 24 hours of light each day during their entire life cycle.
A popular choice is a 20/4 light cycle, which means 20 hours of light and 4 hours of darkness daily.
Growing autoflowering weed plants from seed to harvest in a climate like Australia will take between 8 and 12 weeks.
It also depends on if you’re growing indoors or outdoors. Outdoor-grown autos can take 12 weeks.
Yes, it is possible to grow your autoflowering seeds indoors or outdoors.
When growing outdoors, it’s better to use a strain specifically suited to an outdoor environment such as the Northern Lights.
There’s no straight answer for the best nutrients for autoflowering strains, as it depends on the strain’s growing requirement, the stage of the plant, and the medium.
Generally, the first two weeks should not include any feeding schedule, especially if you use standard potting soil with nutrients or organic super soil.
Start with a low dose of nutrients, such as an N-P-K ratio of 10-5-5 or 20-10-10, from 2 to 4 weeks after germination.
Nitrogen (N): essential during the growth phase for developing leaves and stems.
Phosphorus (P): Important for growing roots, flowers, and seeds.
Potassium (K): Improves overall plant health, helps with water absorption, and supports photosynthesis.
You have made a smart decision by choosing to grow an autoflowering cannabis plant in Australia this year.
We carefully handpicked the above list of the best autoflower seeds to buy so that there’s something for every kind of grower.
So, whether you are more focused on potent THC levels, impressive yields, or unique flavours, we hope you found an autoflower seed for your preference.
