Meet Grapefruit Auto, a bright, fruit-forward variety with fast autoflowering performance and an upbeat, creative character. Sweet citrus flavor, resin-rich buds, and a manageable size make it an appealing pick for new growers and seasoned cultivators alike.

Our breeders crossed classic Grapefruit genetics with Ruderalis to create a quick, adaptable autoflower. The result leans 70% sativa and 30% indica, bringing together lively, uplifting qualities with a softer note of body relaxation.

Expect a juicy grapefruit twist layered with sweet, fruity notes. Its smooth, flavorful smoke carries a fresh citrus edge, while dense buds can develop a frosty coat of aromatic resin.

With THC levels listed at 16% to 19%, Grapefruit Auto delivers a medium-strength experience suited to those seeking a cheerful lift. Creative, euphoric, and uplifting effects bring an energetic mood and clear-headed feel, with gentle relaxation in the background.

Its terpene lineup includes limonene, terpinolene, alpha-pinene, beta-pinene, caryophyllene, linalool, humulene, and delta-3-carene. The citrus-forward profile pairs naturally with daytime creativity, social plans, or a relaxed evening when you want to unwind while staying engaged.

These autoflowering seeds flower according to age, so they do not need a change in light schedule to begin blooming. The full cycle takes about 8 to 10 weeks from seed to harvest, and the variety is rated beginner-friendly. Every Grassfarmer order includes our germination guarantee.

Start seedlings in a quality, well-draining medium such as coco or soil amended with perlite. Keep conditions warm and provide steady light as plants develop. Indoors, many growers choose an 18/6 or 20/4 light schedule; outdoors, select a sunny spot and plan for a warm growing window.

Plants can reach around 3.28 feet, or 1 meter, with a compact, sturdy structure suited to smaller spaces. Use moderate feeding, maintain airflow, and check plants regularly for pests or excess moisture. Consistent care helps support healthy growth and a strong aromatic profile.

Grapefruit Auto finishes quickly, with harvest available in as little as 8 to 10 weeks. Under suitable conditions, listed yields reach up to 500 g/m² indoors and 500 g per plant outdoors. Its resin-coated flowers also make it an attractive choice for growers interested in concentrates.

Choose Grapefruit Auto for brisk turnaround, vivid citrus sweetness, and an energizing finish. Grassfarmer offers premium genetics in small and bulk quantities, with fast, discreet shipping and guaranteed delivery across the USA, Canada, the European Union, and the U.K.

Attributes

Climate Temperate
Effects Creative, Euphoric, Uplifted
Flavors Fruity, Sweet
Genetics 30% Indica / 70% Sativa
Harvest Month All Season
Height 3.28 ft | 1 m
Indoor Yield 1.64 oz/ft² | 500 g/m²
Life Cycle 8–10 weeks
Lineage GrapeFruity x Ruderalis
Medicinal Depression, Insomnia, Muscle Spasms
Outdoor Yield 17.64 oz/plant | 500 g/plant
Sex Feminized
THC 16%–19% (Medium)
Terpenes Alpha-Pinene, Caryophyllene, Beta-Pinene, Delta-3-Carene, Limonene, Linalool, Terpinolene, Humulene