Wedding Cake Auto vs Runtz Auto
Everything you need to know before buying seeds — THC, yield, difficulty, effects, and the best places to buy in 2026.
Quick Comparison
Wedding Cake Auto Overview
Wedding Cake Auto brings one of the strongest modern photoperiod strains into autoflower format, with THC levels pushing 24–27% — extraordinary for an auto. Available from breeders like Fast Buds and Barney's Farm, WC Auto preserves the vanilla-earthy flavor and heavy-hitting effects of the original. The plants develop dense, resinous buds with the same thick trichome blanket that made Wedding Cake a dispensary staple. For growers, this is a rewarding moderate-difficulty auto that delivers genuine top-shelf quality in about 70–80 days from seed.
🌱 Growing Tips
Moderate-heavy feeder for an auto. Bushy plants benefit from defoliation during early flower. Humidity control is important due to dense bud structure. PK boost during weeks 4–6 enhances density. Support branches in late flower. 3–5 gallon containers recommended.
Runtz Auto Overview
Runtz Auto from Barney's Farm brings the most hyped modern strain into autoflower format with remarkable fidelity. The candy-fruit terpene profile, dramatic purple and pink coloring, and social-to-sedating effect progression are all preserved. Testing at 25–29% THC, Runtz Auto pushes the boundaries of what autos can achieve. For growers, this is a moderate-difficulty auto that demands the same environmental attention as its photoperiod parent but rewards with visually stunning, incredibly flavorful buds in about 70–80 days.
🌱 Growing Tips
Climate control matters — consistent temps and humidity for best results. Drop night temps to 65–68°F for color development. Moderate feeding; sensitive to overfeeding. Support branches in late flower. Candy terps develop fully in final 1–2 weeks. 3–5 gallon containers. Slow cure (3+ weeks) for maximum flavor.
Head-to-Head Comparison
Both strains represent the pinnacle of modern autoflower breeding — taking two of the most hyped photoperiod strains and compressing them into fast-finishing auto formats without sacrificing potency or flavor. The choice mirrors their photoperiod versions: Wedding Cake Auto is the heavier hitter with stronger indica effects, higher yields, and a vanilla-earthy flavor profile that leans savory-sweet. Runtz Auto prioritizes bag appeal, candy-fruit flavor, and a more balanced high that starts social and uplifting before settling into relaxation. Growing difficulty is comparable for both — moderate attention needed, similar timelines, similar yields. The tiebreaker comes down to effect preference: heavy evening sedation (Wedding Cake) vs social versatility (Runtz), and flavor preference: creamy vanilla vs candy fruit.
Where to Buy Wedding Cake Auto & Runtz Auto Seeds
These are the seed banks we recommend based on breeder selection, reliability, and community trust. Affiliate links support this site at no extra cost to you.
North Atlantic Seed Co (NASC)
Reddit #1Largest selection from 300+ breeders — the community #1 pick on Reddit
Multiverse Beans
PartnerPremium genetics with insane freebies — use code MULTIVERSE420 at checkout
Frequently Asked Questions
The Verdict
you want heavier indica effects, vanilla-earthy flavors, higher yields, and a strain suited for evening medical or recreational use
you want maximum bag appeal, candy-sweet tropical flavors, and a more versatile high that works for social settings before settling into relaxation