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Black Jack Seedling

Black Jack cannabis flower close-up by Sweet Seeds

Black Jack cannabis seedling with dense root system

Black Jack cannabis plant with 50% Indica and 50% Sativa genetics

Black Jack Seedling

Data sheet / description

Black Jack (SWEET SEEDS) SEED-GROWN SEEDLING – DATA SHEET
Brand	Sweet Seeds
Parents	Black Domina x Jack Herer
Genetics	50% Indica / 50% Sativa
Available as THC	Seed-grown seedling 16–24%

Product number	SAE-BJ-FEM-1
Weight	1.00 kg

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Hemplant 1 pc Hemp plant 3 pcs

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Product description

Black Jack Seedling – Sweet Seeds × Grow Island

Black Jack (Sweet Seeds) is one of the breeder’s most iconic varieties, created from the legendary cross of Black Domina × Jack Herer. With a perfectly balanced 50% Indica / 50% Sativa genetic profile, this hybrid combines power, clarity, and stability in one classic strain.

In this version, Black Jack is available as a pre-grown seedling, allowing you to skip the sensitive germination phase and start directly with a healthy, well-developed young plant. The seedlings show strong root development and a stable structure, making them ideal for indoor grow rooms, greenhouses, or protected outdoor locations.

The THC content can reach around 20% under optimal conditions. Combined with the low CBD level, this creates a clear, uplifting and social effect that is often described as energetic and euphoric without heavy after-effects.

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General Description of Black Jack Seedlings

Black Jack is known as a highly adaptable and resilient strain that performs reliably across a wide range of growing environments. Originally bred for indoor cultivation, it also thrives outdoors when provided with sufficient sunlight and a stable climate.

The plants typically reach a medium height and develop a strong central stem with well-structured side branches. The overall growth pattern is balanced and bushy. During the flowering phase, dense, resin-rich buds form with an intense aroma and a visually impressive trichome layer.

As seedlings, these plants offer a uniform and reliable start, having already passed the earliest stage of development and being ready to continue vigorous growth after transplanting.

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Aroma & Flavor Profile

One of Black Jack’s standout features is its rich and complex terpene profile. Even during flowering, the plants release an intense fragrance that blends classic Haze freshness with the deep, earthy tones of Afghan Indica genetics.

sweet and spicy base notes
earthy, resinous undertones
citrus and incense-like freshness
a long-lasting, characterful aftertaste

The dominant terpenes are commonly associated with caryophyllene, myrcene and limonene, creating a flavor that is warm, slightly creamy, and gently citrusy at the same time.

Black Jack Seedling – Leaf Structure Detail

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Genetic Background

The cross of Black Domina × Jack Herer unites two legendary cannabis bloodlines:

Black Domina contributes deep physical relaxation, dense bud structure and heavy resin production.
Jack Herer adds cerebral clarity, creativity and its unmistakable citrus-incense aroma.

The result is a perfectly balanced hybrid that delivers both mental stimulation and physical ease in equal measure.

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Growth & Flowering Time

Black Jack seedlings develop quickly and respond very well to common training techniques such as topping, LST or SCROG. The structure is robust, stable and well suited for both beginner and advanced growers.

medium plant height
bushy, well-branched structure
strong main stem and solid side branches
suitable for indoor, greenhouse and outdoor cultivation

Flowering time (indoor): approx. 8–9 weeks
Outdoor harvest: usually around early October, depending on climate.

Instead of focusing on specific yield numbers, Black Jack stands out for its consistent performance and high flower quality when grown under proper conditions.

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Effects & Experience

With a THC level of around 20–21% and a perfectly balanced hybrid structure, Black Jack delivers an effect that is commonly described as euphoric, motivating and pleasantly relaxing at the same time.

uplifted mood and talkative energy
enhanced creativity
gentle physical relaxation
ideal for social situations, music and relaxed evenings

Many users describe Black Jack as a true “party strain without the heavy comedown”.

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Important Legal Notice

In Austria, hemp plants may only be cultivated for leaf production under more than 18 hours of light per day. Once flowering begins, the plant must be removed.

Please always inform yourself about the current legal regulations in your country before starting cultivation.

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