Auto Ultimate by Dutch Passion – High-Yielding Autoflowering Cannabis Seeds for Massive Harvests

Auto Ultimate by Dutch Passion is a powerhouse autoflowering strain engineered for maximum yield and minimal stress, delivering XXL harvests of potent, aromatic buds with ease.

Still rolling mediocre buds that barely fill a jar? Your stash game is stuck in low gear while your plant space gathers dust. You’re putting in the work, but getting lackluster results — small yields, weak effects, and flowers that look more sad than spectacular.

It’s frustrating when your grow doesn’t match your effort. You deserve better than sparse, airy buds and endless troubleshooting. The ritual should feel rewarding, not like a constant battle against stunted growth and underwhelming returns. Without the right genetics, you’re just spinning your wheels.

Meet Auto Ultimate — the autoflower that turns modest setups into monster harvests. With explosive vigour and a proven track record of 500+ grams per plant, this strain floods your jars with dense, trichome-coated colas in just 11–14 weeks. No PhD in plant science needed — just plant, feed, and watch it dominate your grow space.

What It Feels Like to Grow and Smoke Auto Ultimate

From the first sprout, Auto Ultimate announces its presence — fast, bold, and unstoppable. It shoots up with thick stems and wide branches, forming a Christmas tree structure that’s begging to be loaded with bud. Indoors, it fills a 1.20 m x 1.20 m tent with a jungle of green under 600W LED, while outdoors it thrives in full sun or partial shade. The sight of those thick, golf ball-sized colas forming in just weeks is pure satisfaction.

When you finally break open a cured nug, the aroma hits — zesty lemon, earthy pine, and a hint of old-school skunk that teleports you straight to Amsterdam. The smoke is smooth, flavorful, and potent, starting with a euphoric head rush that lifts your mood and sparks creativity. As it settles, a deep physical relaxation rolls in — not couch-lock, but a warm, welcome calm that eases tension without knocking you out. It’s the perfect daytime smoke if you work, create, or just want to stay present and uplifted.

How to Maximize Your Auto Ultimate Harvest

Auto Ultimate rewards smart technique, not just brute force. With a few pro moves, you can push it from great to legendary.

• Start in a final pot of 18–27 L (6–7 gal) to avoid transplant stress.
• Use 18–20 hours of light daily — or go 24/0 in winter to maintain warmth.
• Apply LST early to spread the canopy and expose more bud sites.
• Feed consistently but avoid overfeeding — watch for yellow leaf tips.
• Support heavy branches with a trellis net to prevent breakage.
• Drop to 12/12 in the last 3 weeks to boost terpene development.
• Flush for 10–14 days before harvest for a cleaner taste.

Advantages and Benefits in Your Daily Grow Life

• Thanks to its autoflowering genetics, you get harvests in 11–14 weeks — no light cycle changes needed.
• With XXL yields of up to 1 kg/m², you’ll have enough for months — or to share with friends.
• Its high resistance to overfeeding and overwatering means fewer mistakes ruin your crop.
• The balanced sativa-indica effect gives you focus and calm — perfect for daytime use.
• Its strong citrus-pine aroma makes drying discreet and curing a sensory delight.
• The frosty, dense buds are ideal for concentrates like rosin or wax.

How Auto Ultimate Fits Into Your Grow Setup

Auto Ultimate plays well with others — whether you’re running a full hydro setup or growing in soil. Pair it with BioTabs Tablets for slow-release organic nutrition, or use it in a DWC system with Trikologic (Bioponic Mix) for explosive growth. It thrives under LED, but adapts to HPS or CFL. For root health, consider starting with Clonex Rooting Hormone Gel to ensure strong early development.

Technical specifications

• Breeder / Brand: Dutch Passion
• Type: Autoflowering
• Dominance: Hybrid (balanced indica/sativa)
• Genetics: The Ultimate × Auto Mazar
• Flowering time: 11–14 weeks from seed to harvest
• Indoor yield: 600–1000 g/m² (2.12–3.53 oz/ft²)
• Outdoor yield: 150–500 g/plant (5.29–17.64 oz/plant)
• Indoor height: 1.00–1.50 m (3.28–4.92 ft)
• Outdoor height: 1.50–2.00 m (4.92–6.56 ft)
• Difficulty: Low
• Structure and vigour: Strong, wide branching, high vigour
• Resistance: High resistance to overfeeding, overwatering, and environmental stress
• Training: Suitable for LST and low-stress techniques; avoid topping
• Recommended pot: 18–27 L (6–7 gal) final pot
• Light: 18–20 h or 24/0 throughout the cycle
• Temperature: 22–26 °C (veg), 20–25 °C (flowering)
• Humidity: 50–60% (veg), 40–50% (flowering)
• pH: 6.0–6.5 (soil), 5.8–6.2 (coco/hydro)
• THC: High (approx. 18–22%)
• Aromatic profile: Limonene, myrcene, pinene
• Flavour: Citrus, pine, earthy skunk, hint of lemon
• Effect: Balanced cerebral and physical high — uplifting, relaxing, long-lasting

How to Grow Auto Ultimate Seeds Successfully

Auto Ultimate is beginner-friendly but delivers pro-level results with minimal fuss.

Quick overview: Dutch Passion’s autoflowering hybrid, 11–14 week cycle, low difficulty, ideal for indoor tents or outdoor gardens.

Safe start: Germinate in a moist paper towel at 22–25 °C. Transplant when the taproot is ~1 cm (0.4 in). For a faster start, Clonex Rooting Hormone Gel boosts root development and reduces shock.

Stable seedling: Keep humidity at 60–70% and light gentle (CFL or low-power LED). Water lightly and ensure good drainage. Use airy soil or coco to prevent root rot.

Directed growth: Move to final 18–27 L (6–7 gal) pot early. Apply LST to open the canopy. Maintain 18–20 h of light. Feed with balanced nutrients — increase gradually as plant size grows.

Flowering by stages: No light change needed. In early flowering, keep RH at 50%. In mid-flowering, reduce to 40–45% and add bloom nutrients. In late flowering, drop to 40% and support heavy colas with netting.

Harvest, drying and curing: Harvest when 70% of trichomes are milky, 30% amber. Flush 10–14 days before. Dry at 18–22 °C and 50–60% RH for 10–14 days. Cure in jars for 2–4 weeks, burping daily.

Frequently Asked Questions

How long does Auto Ultimate take from seed to harvest?

Auto Ultimate takes 11 to 14 weeks from seed to harvest, depending on conditions. Some phenotypes benefit from an extra 2–3 weeks for maximum resin and yield.

Is Auto Ultimate good for beginners?

Yes, it’s one of the most forgiving autoflowers — resistant to overfeeding, overwatering, and environmental stress. Perfect for first-time growers.

Does Auto Ultimate smell strong during flowering?

Yes, it has a powerful citrus-pine and skunky aroma. Use a carbon filter like Seedfinder to keep your grow discreet.

Can I grow Auto Ultimate outdoors in a cold climate?

Yes, it’s resilient and adapts well. For best results, plant in late spring or early summer when temperatures are consistently above 15 °C.

What’s the best way to increase yield?

Use LST, provide strong light from all angles, feed consistently, and support heavy branches. Growing in DWC or with organic amendments like BioTabs can boost results.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown Auto Ultimate in my attic setup under 240W LED, and it’s a beast. At 109 days, I harvested over 400 grams from a single plant in a 20L pot — and it wasn’t even fully stretched. The buds were rock-hard, covered in trichomes, and smelled like lemon cleaner mixed with forest floor. I didn’t top it, just did light LST, and it formed a perfect bush.

What surprised me? How forgiving it is. I forgot to water it for five days during flowering — most autos would’ve stalled. This one just shrugged and kept growing. The high is no joke: it starts energetic, like a double espresso, then melts into a deep, calming wave. I use it on weekends when I want to clean the garage and still feel creative.

Pro tip: drop your light cycle to 12/12 in the last three weeks. My buds came out stickier, smellier, and way more potent. Dutch Passion nailed it — this is the autoflower that actually lives up to the hype.