Auto Tao Blueberry
Cannabis seeds
by Top Tao Seeds
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Auto Tao Blueberry Cannabis Seeds
Auto Tao Blueberry is a regular autoflowering cannabis seed from Top Tao Seeds that crosses the legendary Blueberry with Ruderalis genetics. The result: a compact, purple-hued plant that smells like a punnet of freshly picked berries and practically grows itself. From seed to harvest in roughly 105 days, no light schedule changes needed. If you want Blueberry flavour without the fuss of photoperiod growing, this is where you start.
Why Auto Tao Blueberry Seeds Stand Out
Top Tao Seeds built their reputation on outdoor-friendly genetics with proper resilience, and Auto Tao Blueberry is a solid example of that approach. The Blueberry parent — originally bred by DJ Short in the late '70s — is one of the most decorated indica-dominant strains in cannabis history. Top Tao crossed it with Ruderalis to add the autoflowering trait, meaning the plant transitions from vegetative growth to flowering on its own internal clock rather than depending on a shift in light hours.
What you get is a strain that keeps the deep, fruity Blueberry terpene profile and those signature purple hues, but in a format that's far more forgiving to grow. The plant stays between 100 and 200cm, which is manageable indoors in a tent or outdoors on a balcony. And because it's a regular seed (not feminised), the pack will produce both male and female plants — useful if you're interested in breeding or selecting your own phenotypes, though you'll need to identify and remove males if you're growing strictly for flower.
One honest note: at roughly 105 days from seed to harvest, Auto Tao Blueberry is on the slower side for an autoflower. Many autos finish in 70-80 days. The extra time pays off in flavour and yield, but if speed is your top priority, something like a fast-finishing auto from another breeder might suit you better. We'd still pick this one for the taste alone.
Flavour, Aroma and Growing Auto Tao Blueberry
The sensory profile is where this strain really earns its name. Crack open a cured bud and you get hit with a sweet, unmistakably berry-forward aroma — not artificial or candy-like, more like actual blueberries with a slightly earthy, musky undertone from the Ruderalis side. The smoke carries that same fruity sweetness through to the exhale. If you've grown standard Blueberry before, you'll recognise the flavour immediately, just in a more compact package.
Visually, Auto Tao Blueberry is one of the more striking plants you can grow at home. The calyxes develop deep purple and blue tones, especially when exposed to cooler nighttime temperatures during flowering. Even if you're not chasing huge harvests, the plant is genuinely beautiful to watch develop.
Growing is straightforward. No need to adjust your light timer to trigger flowering — the Ruderalis genetics handle that automatically. She thrives indoors under 18-20 hours of light throughout the entire cycle, or outdoors in a sunny spot from spring through autumn. The 100-200cm height range means she won't outgrow a standard 120cm tent, though outdoor plants with plenty of root space can push toward the taller end. Keep humidity in check during late flowering to protect those dense buds from mould — that's the main thing to watch for with any Blueberry cross.
| Specification | Detail |
|---|---|
| Seed bank | Top Tao Seeds |
| Genetics | Blueberry x Ruderalis |
| Seed type | Regular (non-feminised) |
| Flowering type | Autoflowering |
| Seed-to-harvest time | Approximately 105 days |
| Plant height | 100-200cm |
| Growing environment | Indoor and outdoor |
| Seeds per pack | 5 |
| Dominant genetics | Indica-dominant hybrid |
Regular vs Feminised Autoflower Seeds
Auto Tao Blueberry comes as regular seeds only — no feminised option in this pack. That means roughly half your plants will be male and half female. If you're growing for smokeable flower, you'll need to sex your plants during early flowering and remove the males before they pollinate. Look for pollen sacs (small round clusters at the nodes) on males versus the white pistils on females, typically visible 3-4 weeks after germination.
If sexing plants sounds like more hassle than you want, feminised autoflower seeds from other breeders guarantee all-female plants. But regular seeds have their place: they're the go-to for breeders who want to create their own crosses, and some growers swear the genetic diversity in regular seed stock produces more vigorous plants. For a first grow, we'd normally point you toward feminised seeds — but if you're comfortable identifying males, regular seeds like these give you more options.
| Feature | Regular seeds (Auto Tao Blueberry) | Feminised autoflower seeds |
|---|---|---|
| Male/female ratio | Approximately 50/50 | 99%+ female |
| Sexing required | Yes — remove males manually | No |
| Breeding potential | Full — males available for pollination | Limited without reversal techniques |
| Best for | Breeders, experienced growers | Growers focused on flower production |
| Light schedule | No change needed (autoflowering) | No change needed (autoflowering) |
Complete your setup with a propagation kit to give these seeds the best possible start — a heated propagator and root stimulator can cut germination time and boost early vigour. If you're growing indoors, pair Auto Tao Blueberry with a carbon filter setup to manage that strong berry aroma during flowering.
How to Grow Auto Tao Blueberry Seeds
- Germinate your seeds using the paper towel method: place seeds between two damp (not soaking) sheets of kitchen paper on a plate, cover with a second plate, and keep in a warm spot (20-25°C). Taproots typically emerge within 24-72 hours.
- Plant each germinated seed taproot-down into a small pot (0.5L) filled with light, airy soil or coco coir. Cover with roughly 1cm of medium and mist the surface. Keep the soil moist but not waterlogged.
- Once seedlings show their first true leaves (not the round cotyledons), transplant into their final container. Use at least 11L pots — autoflowers don't like being transplanted more than once, so going straight to the final pot is even better if you're confident with watering.
- Set your indoor light schedule to 18 hours on, 6 hours off for the entire lifecycle. Outdoor growers should plant after the last frost, ideally when daytime temperatures consistently stay above 15°C.
- Begin light feeding with a vegetative nutrient around week 2-3. Switch to bloom nutrients when you see the first pre-flowers (typically around week 4-5 from germination). Auto Tao Blueberry is not a heavy feeder — start at half the recommended dose on the bottle and increase only if the plant looks hungry.
- Sex your plants once pre-flowers appear. Remove any males promptly to prevent pollination of your females. Males show small round pollen sacs at the nodes; females show white pistils (hairs).
- During late flowering, drop nighttime temperatures to 15-18°C if possible — this encourages the purple colouration that makes Blueberry genetics so visually striking. Keep relative humidity below 50% to prevent bud rot.
- Harvest when approximately 70-80% of trichomes have turned milky white with a few amber ones appearing. With Auto Tao Blueberry, this is typically around day 105 from seed, but always check trichomes with a jeweller's loupe rather than relying on calendar dates alone.
What to Expect from Auto Tao Blueberry
The effect profile leans indica-dominant, which tracks with the Blueberry parentage. According to research published in the Journal of Cannabis Research, indica-dominant strains have traditionally been associated with more physically relaxing effects compared to sativa-dominant varieties (Mother of Berries, ACDC, or Chocolope?: Examination of Nomenclature, PMC6275121). The initial onset tends toward a gentle mood lift that settles into a calm, body-focused state — good for an evening session rather than a wake-and-bake.
According to a review in Cancers (Anti-Cancer Potential of Cannabinoids, Terpenes, PMC7409346), cannabis-based preparations have been studied across a range of conditions, though clinical evidence varies significantly by application. We mention this for context, not as a product claim — what you'll notice from growing and consuming Auto Tao Blueberry is primarily the flavour and the relaxation, not a medical miracle.
Yield-wise, expect moderate to good returns for an autoflower. Indoor growers with proper lighting and feeding can pull a satisfying harvest from each female plant. Outdoor plants with full sun and good soil tend to push toward the higher end of the size range and produce accordingly. The 105-day timeline is longer than many autos, but the trade-off is denser, more flavourful buds than you'd get from a 70-day speed run.
Frequently Asked Questions
How long does Auto Tao Blueberry take from seed to harvest?
Approximately 105 days from germination to harvest. That's on the longer side for an autoflower — many finish in 70-80 days — but the extra time produces denser buds with the full Blueberry flavour profile.
Are Auto Tao Blueberry seeds feminised or regular?
Regular. Expect roughly 50% male and 50% female plants. You'll need to identify and remove males during early flowering if you're growing for consumable flower rather than breeding.
Can I grow Auto Tao Blueberry indoors?
Yes. She stays between 100-200cm, fitting comfortably in a standard grow tent. Run your lights on an 18/6 schedule throughout the entire lifecycle — no need to switch to 12/12 for flowering.
Why does Auto Tao Blueberry turn purple?
The anthocyanin pigments inherited from the Blueberry parent cause purple and blue hues in the buds and leaves. Cooler nighttime temperatures (15-18°C) during flowering enhance the colour expression.
How tall does Auto Tao Blueberry grow?
Between 100 and 200cm depending on growing conditions. Indoor plants in smaller pots stay shorter; outdoor plants with unrestricted root space and full sun push toward the taller end of the range.
Is Auto Tao Blueberry good for beginner growers?
The autoflowering trait makes the growing process simpler — no light schedule changes needed. The one complication is that these are regular seeds, so you'll need to sex your plants. If that's new to you, read up on identifying male pre-flowers before you start.
What does Auto Tao Blueberry smell and taste like?
Sweet, unmistakably berry-forward — like fresh blueberries with a slightly earthy, musky base note. The flavour carries through from the aroma to the smoke. A carbon filter is strongly recommended for indoor grows.
Last updated: April 2026
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Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.