Pineapple Slush XL Auto® by Sweet Seeds – Tropical Autoflowering Powerhouse with 22–28% THC

Pineapple Slush XL Auto® by Sweet Seeds is a next-gen autoflowering strain that delivers massive tropical flavor, up to 450 g/m² indoors, and a creative, uplifting high — all in just 8–9 weeks from seed to harvest.

Still stuck in the same old grow routine, using strains that take forever and taste like hay? What if you could grow a plant that’s ready in under three months, smells like a pineapple smoothie, and actually gets you inspired instead of couch-locked?

Most autoflowers are small, weak, and forgettable — but Pineapple Slush XL Auto® breaks the mold. It’s not just fast; it’s powerful, aromatic, and built for real results. Whether you're chilling at home, growing discreetly on a balcony, or chasing top-tier resin for extracts, this strain adapts to your life — not the other way around.

At Home: Your Daily Creative Boost

Imagine kicking off your morning with a session that sparks ideas instead of fogging your brain. Grown indoors under LED lights, Pineapple Slush XL Auto® fills your grow tent with a sweet, citrusy punch that lingers in the air — no perfume needed. At 0.55–1.35 m (1.80–4.43 ft) tall, it fits perfectly in tight spaces, and its 8–9 week cycle means you can harvest before most photoperiod plants even finish veg.

Keep it in a 20 L pot, feed it a balanced organic mix, and you’ll see dense, resin-coated buds forming fast. It’s the ideal strain for creators, remote workers, or anyone who wants a clean, motivating high without the crash.

Outdoors: Fast, Discreet & Storm-Ready

Got a patio, rooftop, or hidden corner in your garden? Pineapple Slush XL Auto® thrives outdoors from spring to early autumn, yielding 40–130 g (1.41–4.59 oz) per plant. Thanks to its Ruderalis backbone, it flowers regardless of light pollution, so streetlights won’t mess with your crop.

It’s also more resistant to mold and temperature swings than most autos, making it a smart pick for humid or unpredictable climates. Just avoid frost, and you’ll harvest frosty, aromatic buds before the September rains hit — perfect for avoiding botrytis and nosy neighbors.

How to Choose the Best Use for You

Not sure if this strain fits your vibe? Here’s how to decide:

• If you’re more of a homebody grower, Pineapple Slush XL Auto® gives you fast turnover and big flavor in a compact setup.
• If you’re a mobile or discreet grower, its short cycle and low profile make it perfect for balconies or temporary grows.
• If you’re a flavor and resin collector, its 22–28% THC and dense trichomes are ideal for concentrates.
• If you’re a creative or daytime user, the energetic, cerebral high keeps you active, not sedated.

Advantages and benefits that show up in every case

• Harvest in just 8–9 weeks — no waiting months for results.
• Explosive tropical aroma with pineapple, mandarin, and citrus notes.
• High THC (22–28%) with a clean, stimulating effect.
• Yields up to 450 g/m² (1.6 oz/ft²) indoors with proper care.
• Resilient to stress, pests, and light pollution.
• Easy to grow — perfect for beginners and experts alike.
• Produces dense, resinous buds ideal for extractions.

Technical specifications

• Breeder / Brand: Sweet Seeds
• Type: Autoflowering
• Dominance: Balanced hybrid (48.7% Indica, 50.9% Sativa, 0.4% Ruderalis)
• Genetics / Cross: Pineapple Express × Sweet Mandarine Z XL Auto®
• Life cycle: 8–9 weeks from germination to harvest
• Indoor yield: 350–450 g/m² (1.24–1.60 oz/ft²)
• Outdoor yield: 40–130 g/plant (1.41–4.59 oz/plant)
• Indoor height: 55–135 cm (21.65–53.15 in)
• Outdoor height: 55–135 cm (21.65–53.15 in)
• Difficulty: Low
• Structure and vigour: Bushy, strong branching, short internodal spacing
• Ideal climate: Temperate, Mediterranean
• Resistance: Moderate resistance to mold and pests
• Training: Suitable for LST; avoid topping or FIM
• Recommended pot: 18–27 L final pot
• Light: 18–20 hours daily
• Temperature: 22–26 °C (71.6–78.8 °F) in veg, 20–25 °C (68–77 °F) in flowering
• Humidity: 60–70% in seedling, 50–60% in veg, 40–50% in flowering
• pH: 6.0–6.5 (soil), 5.8–6.2 (coco/hydro)
• Smell in grow: High — use a carbon filter if needed
• THC: 22–28%
• CBD: 0.1%
• Aromatic profile: Limonene, pinene, myrcene
• Flavour: Tropical, citrus, pineapple, mandarin, with a hint of acidity and woody undertone
• Effect: Energetic, creative, stimulating, with balanced relaxation — ideal for daytime use

How to grow Pineapple Slush XL Auto®

Get the most out of your grow with this expert-backed plan tailored to Pineapple Slush XL Auto®’s fast, resilient nature.

Quick overview: autoflowering · Sweet Seeds · 8–9 week cycle · low difficulty · ideal for indoor tents or outdoor patios.

Safe start: Germinate in a moist paper towel at 22–25 °C. Transplant once the taproot is ~1 cm long.

• Use a 1 L pot to start — prevents overwatering.
• Keep humidity high (70%) for strong seedling growth.
• Add Trabe Ultrahemp estimulator to your first watering to boost root development.
• Avoid direct sunlight — use a propagation dome.
• Transplant to final pot by day 17 to avoid root stress.

Directed growth: Move to final 20 L pot and keep lights on 18–20 h/day.

• Use airy soil like Substrat Complete Mix Top Crop for optimal root oxygenation.
• Water when top 2–3 cm of soil is dry.
• Begin mild nutrients after first true leaves appear.
• Apply low-stress training (LST) early to maximize light exposure.
• Maintain pH 6.0–6.5 to prevent nutrient lockout.

Flowering boost: Weeks 3–7 are critical for bud development.

• Keep RH at 40–50% to prevent mold.
• Ensure strong airflow with oscillating fans.
• Introduce a PK booster like Brutal Bloom in week 5 for denser, resin-rich buds.
• Monitor trichomes weekly — aim for milky white at harvest.
• Flush with pure water 7–10 days before harvest.

Harvest & cure: Trim, dry, and cure for peak flavor.

• Cut when 70% of trichomes are milky, 30% amber for balanced effects.
• Dry at 18–22 °C and 50–60% RH for 7–10 days.
• Cure in glass jars, burping daily for 2–4 weeks.
• Store in a cool, dark place to preserve terpenes.
• Enjoy the full tropical punch at its peak.

Frequently Asked Questions

Can I grow Pineapple Slush XL Auto® outdoors in a cold climate?

Yes, but avoid frost. It thrives in temperate to Mediterranean climates and can be grown from spring to early autumn. Its Ruderalis genes make it more resilient than most, but it still needs temps above 10 °C to grow properly.

Is this strain good for beginners?

Absolutely. It’s low-maintenance, resistant to stress, and doesn’t require complex lighting schedules. Just keep it in a 20 L pot, feed it regularly, and harvest in 8–9 weeks.

What does it taste like?

A burst of tropical pineapple and mandarin, with a tangy citrus kick and a subtle woody finish. It’s like vaping a gourmet fruit slushie — smooth, flavorful, and unforgettable.

Can I use it for concentrates?

Definitely. Its high resin production and 22–28% THC make it perfect for hash, rosin, or live resin. Expect sticky, aromatic extracts that capture the full terpene profile.

How tall does it get?

Indoors or outdoors, it reaches 55–135 cm (21.65–53.15 in), making it ideal for stealth grows or small spaces.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown dozens of autos, but Pineapple Slush XL Auto® stands out. I ran two phenos in my 60x60 cm tent under a 300W LED — one stretched a bit, the other stayed compact. Both smelled like a fruit market from week 4. I didn’t top them (autos hate that), but I did LST gently, and the yield was insane: over 400 g/m². The high is clean, creative, and lasts for hours — perfect for writing or jamming. I’d recommend it to anyone who wants a fast, flavorful, and potent autoflower without the hassle. My only tip? Don’t skip the flush — it makes the smoke smoother and the flavor pop.