Diablo’s Delight XL Auto® by Sweet Seeds – Tropical Watermelon Aroma & Fast 8-Week Harvest

Diablo’s Delight XL Auto® by Sweet Seeds is an extra-large autoflowering hybrid that delivers massive yields, a mouthwatering watermelon aroma, and a beautifully balanced high—all in just 8 weeks from seed to harvest.

Overwhelmed by complicated grows and underwhelming flavors?

Most autoflowers promise speed but skimp on flavor, potency, or size. You end up with tiny plants, bland smoke, and harvests that don’t impress. It’s frustrating when you want quality but don’t have months to wait or a PhD in plant science.

Why settle for small, boring buds when you can grow something extraordinary?

Spending weeks on a grow only to get weak effects and forgettable taste kills the joy. And if your plant gets mold or collapses under its own weight, all that effort vanishes. You deserve a strain that’s easy, reliable, and actually exciting to smoke—not just another forgettable auto.

Diablo’s Delight XL Auto®: big, bold, and ready in 8 weeks

This XL powerhouse from Sweet Seeds combines Watermelon OG’s juicy sweetness with Diablo Rojo XL Auto®’s rugged beauty and resin production. The result? A fast, high-yielding plant with dense, colorful buds, a tropical terpene punch, and a euphoric-yet-relaxing high—perfect for both daytime creativity and evening chill sessions.

Less clutter, more impact

Forget juggling multiple strains for flavor, yield, and ease. Diablo’s Delight XL Auto® does it all. Its robust indica-dominant structure (53.4% Indica) supports heavy harvests without staking, while its 45% Sativa influence keeps the high uplifting. You get a complete grow experience in one seed—no need for backup plants or complex setups.

What you gain with this XL auto

• Replace slow photoperiods with an 8-week autoflower cycle
• Drop bland, earthy strains for intense watermelon and ripe fruit flavors
• Eliminate mold anxiety with its compact, airy bud structure
• Skip multiple grows—harvest up to 550 g/m² in one go
• Stop guessing with a stable, homogeneous phenotype
• Forget weak highs—enjoy a balanced 18–24% THC experience

How to build your ultimate low-maintenance setup

1. Start with 3–5 seeds to ensure strong genetics
2. Use a 7L pot per plant for indoor SOG or 50L for outdoor freedom
3. Place it under 18–20h light with a simple 18/6 or 20/4 cycle
4. Feed with a balanced fertilizer like FloraMicro Hard Water GHE from week 2
5. Add beneficials like Funky Fungi B.A.C early for unbreakable roots
6. Let it flower naturally—no light switching needed
7. Harvest at 8 weeks when trichomes turn milky-amber

Advantages of a streamlined grow

• Fewer decisions, more confidence
• Less time spent on maintenance
• Higher yields in less time
• More consistent, flavorful results
• Greater discretion with fast, compact growth
• Easy sharing—everyone loves that watermelon punch

Technical specifications

• Breeder / Brand: Sweet Seeds
• Type: Autoflowering (feminized)
• Dominance: 53.4% Indica / 45% Sativa / 1.6% Ruderalis
• Genetics: Watermelon OG × Diablo Rojo XL Auto®
• Total cycle: 8 weeks (germination to harvest)
• Indoor yield: 450–550 g/m² (1.6–1.9 oz/ft²)
• Outdoor yield: 50–175 g/plant (1.8–6.2 oz/plant)
• Indoor height: 60–130 cm (2.0–4.3 ft)
• Outdoor height: 60–130 cm (2.0–4.3 ft)
• Difficulty: Low to medium
• Structure: Bushy, short internodal spacing, strong lateral branching
• Climate: Temperate, Mediterranean, continental
• Resistance: Moderate to pests and fungi
• Training: Suitable for LST and SCROG; avoid topping
• Pot size: 7–18 L (indoor), 50 L (outdoor)
• Light cycle: 18–20 hours daily
• THC: 18–24%
• CBD: 0.2%
• Aroma: Sweet, tropical, watermelon, citrus, earthy
• Effect: Euphoric, relaxing, creative, happiness

How to grow Diablo’s Delight XL Auto®

Quick overview: Sweet Seeds’ 4th-gen XL autoflower, 8-week cycle, low-medium difficulty, ideal for indoor SOG or outdoor sun.

Safe start: Germinate in darkness at 22–25 °C. Transplant gently when roots show. For faster rooting, Root Green Line Agrobeta boosts early vigor.

Stable seedling: Keep humidity at 60–70%. Use airy soil. Water lightly. Mycorrhizae like Funky Fungi B.A.C lock in nutrients and prevent stress.

Directed growth: Maintain 18–20h light. Support branches with LST if needed. Avoid topping. Feed progressively with balanced nutrients.

Efficient flowering: Lower RH to 40–50%. Ensure airflow. Add bloom boosters like DualPart Bloom in week 3 for denser buds.

Harvest and refinement: Flush 7–10 days before. Harvest when trichomes are milky-amber. Dry at 18–22 °C and 50–60% RH. Cure 2–4 weeks for maximum flavor.

Frequently Asked Questions

Is Diablo’s Delight XL Auto® really ready in just 8 weeks?

Yes. Most plants are ready to harvest 8 weeks after germination, especially indoors under optimal conditions. Outdoor harvests may vary slightly depending on climate.

Can I grow this strain outdoors in a humid climate?

Absolutely. Its compact bud structure and moderate resistance make it suitable for humid areas, especially if you ensure good airflow and use preventative treatments.

Does it really taste like watermelon?

Yes—many growers report a strong, authentic watermelon flavor, backed by ripe fruit and subtle citrus notes. It’s one of its most praised traits.

Is it suitable for beginners?

Definitely. It’s forgiving, stable, and doesn’t require complex training. Just provide light, water, and basic nutrients, and it’ll reward you generously.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve tested dozens of XL autos, but Diablo’s Delight XL Auto® stood out immediately. I grew it side-by-side with other Sweet Seeds strains in my outdoor setup—50L pots, full sun, organic soil. By week 6, the reddish hues started showing, and the aroma was already punching through the garden. At 8 weeks, I harvested 165 grams from a single plant—dense, sticky, and bursting with watermelon. The high was perfect: creative at first, then smoothly transitioning into deep relaxation. No anxiety, no couch-lock. I’ve recommended it to friends who want quality without complexity, and every single one has come back amazed. If you’re tired of autos that look or taste like afterthoughts, this one’s a game-changer.