Purple Queen Autoflower
Cannabis seeds
by Royal Queen Seeds
Purple Queen Autoflower Cannabis Seeds
Purple Queen Autoflower is an indica-dominant autoflowering cannabis seed from Royal Queen Seeds that delivers dense, purple-hued buds in just 8–9 weeks from germination. She's built from a cross of Purple Queen (a photoperiod stunner with Eastern indica roots) and Critical Auto, combining striking aesthetics with genuine potency — 80% indica genetics, 15% sativa, and 5% ruderalis. If you want a fast, forgiving grow that still produces proper flower, this is where you start.
How Many Seeds Do You Need?
Purple Queen Autoflower seeds come in packs of 1, 3, 5, and 10. Growing in a 60x60cm tent? One or two plants will fill that space comfortably — grab the 3-pack so you've got a spare in case of a dud germination. Running a 120x120cm setup or planning successive grows? The 10-pack gives you the best per-seed value and enough genetics for multiple rounds.
| Pack Size | SKU | Best For |
|---|---|---|
| 1 seed | CSRQ0358 | Single-plant test run |
| 3 seeds | CSRQ0359 | Small tent (60x60–80x80cm) |
| 5 seeds | CSRQ0360 | Medium tent or two successive grows |
| 10 seeds | CSRQ0361 | Larger setups or season-long rotation |
Purple Queen Auto Genetics and Lineage
Purple Queen Autoflower traces her lineage back to two parent strains that each bring something distinct to the table. Purple Queen is a photoperiod cultivar descended from Purple Afghani and Hindu Kush — deep Eastern indica genetics responsible for that signature purple colouring and heavy body-focused effect. She produces a reported THC content of around 20% in photoperiod form. The breeders at Royal Queen Seeds wanted those genetics in an autoflowering format, so they crossed her with Critical Auto, an earthy, sweet-terpene auto with solid indica structure and reliable ruderalis timing.
After several generations of stabilisation, Purple Queen Auto emerged as a consistent phenotype. The 80/15/5 indica-sativa-ruderalis split means you get the compact growth pattern and dense flower structure of an indica, a touch of sativa for a bit of height variation, and just enough ruderalis genetics to trigger automatic flowering regardless of light schedule. It's a clean cross — not a Frankenstein project.
| Specification | Detail |
|---|---|
| Seed Bank | Royal Queen Seeds |
| Genetics | Purple Queen x Critical Auto |
| Type | Autoflowering, Feminised |
| Indica / Sativa / Ruderalis | 80% / 15% / 5% |
| Flowering Time | 6–7 weeks |
| Total Grow Time (Seed to Harvest) | 8–9 weeks |
| Indoor Yield | Up to 400g/m² |
| Parent Lineage | Purple Afghani, Hindu Kush (via Purple Queen) + Critical Auto |
| Terpene Profile | Sweet, pine, fruity |
Growing Purple Queen Autoflower Seeds
Purple Queen Autoflower is one of the most forgiving autoflowering strains we've come across, and we'd genuinely recommend her as a first grow for anyone who's never popped a seed before. She handles stress well — a bit of overwatering or a slightly off pH won't send her into a spiral. That said, she's still a plant, not a miracle.
The total grow cycle runs 8–9 weeks from germination to harvest. Flowering kicks in automatically around weeks 2–3 and runs for 6–7 weeks. Indoor growers can expect up to 400g/m² under good conditions — that means proper lighting (18/6 or 20/4 light schedule works well for autos), decent airflow, and a sensible feeding routine. She stays compact, which makes her a solid choice for smaller tents. In a 60x60cm space, one or two plants will fill the canopy nicely without fighting for light.
One honest note: autoflowers don't respond to topping the same way photoperiods do. You can do some low-stress training (LST) — gently bending branches to open up the canopy — but aggressive pruning or topping can stunt her. With only 8–9 weeks of total life, she doesn't have time to recover from major surgery. Keep it gentle.
- Germinate your Purple Queen Autoflower seed using the paper towel method or directly in a small pot of moist, light soil. Taproot should appear within 24–72 hours.
- Transplant the seedling into its final container early — autos don't love being repotted. A 7–11 litre fabric pot works well for indoor grows.
- Set your light schedule to 18 hours on, 6 hours off. Some growers run 20/4 for autos; both work. She's not fussy.
- Feed lightly during the first two weeks. Autoflowers have a shorter vegetative phase and don't need the heavy nitrogen loads that photoperiods crave early on.
- Watch for the first pistils around week 2–3 — that's her switching to flower automatically. Transition to bloom nutrients at this point.
- Apply gentle LST if you want to open up the canopy. Tie branches down rather than cutting them off.
- Flush with plain water for the final 7–10 days before harvest. Trichomes should be mostly milky with a few turning amber when she's ready to chop.
Flavour and Terpene Profile of Purple Queen Auto
Purple Queen Autoflower produces buds with a terpene profile that leans sweet and resinous, with clear notes of pine and a fruity undertone that comes through on the exhale. The pine is the first thing you notice when you crack a jar — sharp, almost like fresh rosemary — and the sweetness fills in behind it. The fruity element is subtle, more like dried berries than a tropical punch. It's a classic indica smell: earthy, dense, and a bit sticky.
The parent strain Critical Auto contributes the earthy sweetness, while the Purple Queen side brings the pine and fruit. If you've grown or smoked anything from the Hindu Kush lineage, you'll recognise the terpene backbone here. It's not a complex or "gourmet" profile — it's honest, straightforward, and pleasant. We'd compare it most closely to something like Royal Critical Auto in terms of that earthy-sweet base, but with the added pine sharpness that makes Purple Queen Auto her own thing.
Why Purple Queen Autoflower Seeds Are Worth Growing
We've sold a lot of autoflower seeds over the years, and the question we get most often is: "which auto actually produces decent flower?" Because let's be honest — the early generations of autoflowers were underwhelming. Tiny plants, airy buds, low potency. Purple Queen Auto is a different animal. She blooms stronger flowers than the majority of autos on the market, and she does it in the same 8–9 week timeframe as the weaker ones. That's the real selling point here.
The purple colouring is a genuine bonus, not a gimmick. Those Eastern indica genetics from Purple Afghani and Hindu Kush produce anthocyanins — the pigments responsible for purple, blue, and red hues in plant tissue. Cooler night temperatures during flowering (around 15–18°C) will bring out the colour more intensely, but even at stable room temperature, you'll see purple tones developing in the calyxes and sugar leaves. It looks fantastic in the jar.
The one downside? Indoor yield caps at around 400g/m², which is respectable for an auto but won't compete with a well-trained photoperiod plant in a longer veg cycle. If maximum yield is your primary goal, a photoperiod strain with a 4–6 week veg and SCROG net will outperform her. But if you value speed, simplicity, and a genuinely enjoyable end product — Purple Queen Auto delivers on all three.
Complete your setup with a grow tent and lighting kit if you're starting from scratch. For growers already running a tent, pair Purple Queen Autoflower with Royal Critical Auto for a staggered harvest — plant them two weeks apart and you'll have two rounds ready within the same grow cycle. If you're after nutrients designed for autoflowers, look into a light feeding schedule with a bloom-focused fertiliser from week 3 onwards.
Frequently Asked Questions
How long does Purple Queen Autoflower take from seed to harvest?
8–9 weeks total. Flowering begins automatically around week 2–3 and lasts 6–7 weeks. No light schedule change needed to trigger bloom — she does it on her own.
Is Purple Queen Auto a good strain for first-time growers?
Yes — she's one of the best beginner autoflowers available. Her indica-dominant genetics make her compact and sturdy, and she handles common mistakes like overwatering or slight nutrient imbalances without collapsing. Just avoid heavy pruning or topping.
What yield can I expect from Purple Queen Autoflower indoors?
Up to 400g/m² under good conditions. That means proper lighting on an 18/6 or 20/4 schedule, adequate airflow, and a sensible feed routine. Realistic first-grow yields tend to land around 250–350g/m².
Will Purple Queen Auto actually turn purple?
Yes, the purple colouring comes from anthocyanins inherited from her Purple Afghani and Hindu Kush lineage. Cooler night temperatures (15–18°C) during flowering intensify the colour, but you'll see purple tones even at stable room temperature.
Can I top or train Purple Queen Autoflower plants?
Low-stress training (LST) works well — gently bend and tie down branches to open the canopy. Avoid topping or heavy pruning. With only 8–9 weeks of total life, she doesn't have enough recovery time for aggressive techniques.
What's the difference between Purple Queen Auto and the photoperiod Purple Queen?
The photoperiod version produces a reported 20% THC and larger yields, but requires a 12/12 light switch to flower and takes longer overall. The auto version trades some of that ceiling for speed and simplicity — seed to harvest in 8–9 weeks with no light schedule management.
What light schedule should I use for Purple Queen Autoflower?
18 hours on, 6 hours off works well throughout the entire cycle. Some growers run 20/4 for a bit more light exposure. Unlike photoperiods, she doesn't need a 12/12 switch to start flowering.
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.