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Diablo’s Delight XL Auto Seeds

Autoflower Seeds

Various Quantities

Price range: $27.00 through $45.00

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Diablo's Delight XL Auto Seeds by Sweet Seeds

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Watermelon OG x Diablo Rojo XL Auto. Hybrid. Autoflowering feminized seeds by Sweet Seeds.

Diablo’s Delight XL autoflowering cannabis seeds by Sweet Seeds. A short, compact feminized autoflower from Watermelon OG and Diablo Rojo XL Auto, ready in about 8 to 10 weeks from seed with high THC and a citrus, sweet and fruity flavor profile. Sold in 3 and 5-seed packs.

Grow specs

Genotype	Hybrid
Genetics	Watermelon OG x Diablo Rojo XL Auto
Seed type	Feminized, autoflowering
Seed to harvest	8 to 10 weeks
Indoor yield	High (450 to 600 g/m²)
Outdoor yield	Modest (up to 200 g per plant)
THC	High (16 to 24%)
Plant height	Short
Flavor	Citrus, sweet, earthy, fruity
Effect	Creative, uplifting

About Diablo’s Delight XL Auto

This XL autoflower crosses Watermelon OG with Diablo Rojo XL Auto, so the watermelon-candy side of an OG line meets a fruit-led autoflower parent. Sweet Seeds classes the result as an indica and sativa hybrid, and the plants stay short, with tight node spacing, a strong main cola and sturdy branches.

Buds are resinous, and the flowers tend to pick up reddish tones as they ripen. THC is rated high, in the 16 to 24% range. That combination of compact structure, color and aroma makes it a favorite for growers who care about how the finished plant looks as well as how it smells.

How it grows

Diablo’s Delight XL is a short plant, which makes it a natural fit for low tents, closets and cabinets where height is tight. It runs about 8 to 10 weeks from seed to harvest and flowers on its own, with no change in the light schedule.

Indoors the yield rating is high, at 450 to 600 g/m². Outdoors it is modest, up to 200 g per plant, so it suits patios and small gardens better than large open plots.

Flavor, aroma and effect

Sweet Seeds lists citrus, sweet, earthy and fruity notes. Expect a bright citrus and ripe-fruit opening over a sweet middle, grounded by an earthy base that comes through more as the buds cure. The listed effect is creative and uplifting, a profile that fits daytime projects and social settings.

Who it is for

A strong choice for growers working in limited vertical space who still want a decent harvest, and for anyone who likes a plant with visible color. It also suits newer autoflower growers, since the short frame needs little training and the schedule is predictable from seed.

Pack options

Diablo’s Delight XL Auto Seeds from Sweet Seeds come in 2 pack sizes: 3 seeds ($36) and 5 seeds ($60). Every seed is feminized and autoflowering, so each one grows into a female plant that flowers on its own schedule without a change in the light cycle.

Seed Germination Instructions

for cannabis seeds

Step 1: Soak the seeds

Fill a glass with clean, room-temperature water (68-77°F / 20-25°C).
Use filtered, dechlorinated, or pH-balanced water to prevent contaminants.
Drop the seeds into the water and gently swirl to ensure full submersion.
If seeds float, tap them down lightly or leave them to absorb water.
Optional: Add 3% hydrogen peroxide (H₂O₂) at a ratio of 1 ml per 100 ml of water to prevent mold and bacteria.
Place the glass in a dark, warm location for 2-6 hours (do not exceed 12 hours to prevent drowning).

Step 2: Prepare the Germination Plate

Dampen two layers of paper towel, cotton, or thick toilet paper with clean, dechlorinated water.
If using toilet paper, fold multiple plies to ensure adequate thickness.
Place seeds evenly between the layers, ensuring they do not touch each other.
Towels should be moist but not soaking wet.
Set the damp towel on a plate and cover with another plate or place it inside a resealable plastic bag to retain moisture.
Store in a dark, warm location (70-78°F / 21-26°C) such as a drawer or cabinet.
Check the moisture level every 6-12 hours and add water as needed to prevent drying.
Expected Germination Time:
- Most seeds crack open within 48-72 hours.
- Some may take 5-6 days to show taproots.
- Older seeds or seeds with a tougher shell may take up to 10-15 days to sprout.
- If a seed has not sprouted within 10 days, gently check it for signs of swelling or softening.

Step 3: Monitor Germination

Seeds typically crack open and develop a taproot within 48-72 hours, but some may take up to 5-6 days.
Older or dormant seeds may take 10-15 days to sprout, especially if they have a thicker shell.
Check regularly for signs of mold or fungal growth.
If mold appears, replace the paper towel and rinse seeds in a diluted hydrogen peroxide solution (1 ml of 3% H₂O₂ per 100 ml water).
The seed is ready for planting when the white taproot emerges and reaches ¼-½ inch (0.6-1.3 cm).

Step 4: Planting the Seeds

Prepare a pH-balanced growing medium (pH 5.5-6.0) such as:
- Quality soil-perlite mix
- Coco coir with perlite
- Rockwool cubes (must be pre-soaked in pH 5.5 water)
Plant the seed 2-5 mm deep, with the root tip facing downward.
Use containers that are at least 10 cm (4 inches) deep with drainage holes for healthy root development.
Lightly cover the seed with soil—do not press down too hard.
Spray the top layer with water instead of drenching it.

Step 5: Initial Care for Seedlings

Keep the growing medium moist but not waterlogged—spray with a spray bottle instead of overwatering.
Maintain high humidity by:
- Covering containers with clear plastic wrap or a humidity dome.
- Ensuring there is some airflow to prevent mold buildup.
Place seedlings under cold white LED or fluorescent lights or in indirect sunlight at 68-77°F (20-25°C).

Step 6: Gradual Exposure to Light

Once seedlings emerge and develop their first set of leaves (cotyledons):
- Slowly introduce them to stronger light sources.
- Start with low-intensity LED, CFL, or indirect sunlight, then gradually increase exposure.
Keep grow lights at a safe distance:
- LEDs: 12-24 inches (30-60 cm) above seedlings.
- HPS/MH: 24-36 inches (60-90 cm) above seedlings.
If transitioning to outdoor sunlight:
- Harden seedlings off gradually by placing them outside for short periods each day.

Additional Tips

Use filtered rainwater, bottled water, or dechlorinated tap water.
Maintain humidity levels between 70-80% for optimal germination.
Avoid handling the taproot directly, as it is delicate and can be easily damaged.
If using rockwool cubes, pre-soak them in pH 5.5 water before planting.
Germination rates depend on strain genetics, seed age, and storage conditions.
Seeds may take longer to sprout if conditions are too dry, cold, or hot.
Failure to follow these steps may reduce germination success and replacements are unlikely.
By following these steps, you’ll achieve healthy, vigorous cannabis seedlings ready for strong growth. 🌱