




Grandaddy Black Strain
THC: 19% - 23%
Type of seed: Feminized
Phenotype: Mostly Indica
Flavor: Earthy, Fruity, Sweet
Day to flower: 8 - 10 weeks
Lineage Grandaddy Black Seeds
Grandaddy Black Strain resulting from the cross between a Black Domina’98 x Grandaddy Purple will produce a hybrid strain Mostly Indica 90% Indica / 10% Sativa. The strain will likely have a Earthy, Fruity, Sweet flavor with a strong Mostly Indica body high.
It also has a Medium THC 19% – 23%, making it a great choice for those looking for a strong and relaxing experience.
A combination of cannabis flower, cannabis concentrate, and terpenes are known for their Arthritis, Insomnia, Pain properties.
Our seeds are fresh and ready to germinate. Follow our Germination guide for best results!
Origin
The Grandaddy Black strain originates from the renowned seed banks of Amsterdam, Netherlands. It is a carefully crafted cross between Black Domina ’98 and Grandaddy Purple, inheriting a rich genetic history.
The strain’s ancestry includes Purple Urkle, Big Bud, Afghan, Northern Lights, Hash Plant, and Ortega, resulting in a potent and flavorful hybrid.
This complex genetic heritage gives the Grandaddy Black seeds a remarkable combination of flavors, colors, and effects. The rich lineage contributes to its strong growth and resinous buds, making it a popular choice for growers seeking both quality and stability.
Grandaddy Black Strain Sativa or Indica?
Grandaddy Black is an Indica dominant strain, 90% Indica / 10% Sativa, from the crossing of Black Domina’98 x Grandaddy Purple, two legendary strains in the world of cannabis. It is a productive plant that features beautiful deep purple, almost black foliage and dense buds covered in thick resin.
The strain leans heavily toward Indica, delivering relaxing effects with a potent body high. While there are slight Sativa influences that provide a mild cerebral uplift, the overall experience is deeply soothing.
As a predominantly Indica hybrid, Grandaddy Black seeds are perfect for evening use or when stress relief is needed. The strain’s calming effects make it an excellent choice for unwinding after a long day.
Grandaddy Black Strain Effects
The Grandaddy Black strain is known for its powerful and relaxing effects. Users often report a strong body buzz that helps relieve tension, pain, and stress, making it ideal for both recreational and medicinal use.
With its rich genetics, Grandaddy Black seeds provide a deeply calming experience, often accompanied by a gentle cerebral uplift. This combination makes the strain suitable for unwinding while maintaining a sense of focus and mental clarity.
Germinating cannabis Grandaddy Black seeds
It is important to germinate your weed seeds carefully if you want to have a healthy harvest from day one. Although there are several methods to germinate our Feminized cannabis seeds, at Blimburn Seeds, we recommend our customers to follow our easy and simple technique.
Before removing our Grandaddy Black seeds from their packaging, remember that cannabis seeds are alive and delicate. Our hands are full of bacteria that can easily infect seeds and ruin our germination.
Set Up Your Germination Station: Begin by moistening two paper towels with room temperature water. Lay one paper towel on a plate and spread the seeds on it, spacing them about 2 cm apart.
Place the second paper towel on top of the seeds, and make sure to remove any excess water from the plate. Cover the setup with another opaque plate and store it in a warm, dark location.
Monitoring: Make sure paper towels are still moist by checking every 4-6 hours and spraying room-temperature water. Typically, germination should occur within 24 to 120 hours.
Once the seeds have sprouted tap roots, plant them with the roots facing down and cover with about 2 cm of soil. Remember to water the soil regularly by spraying to keep it moist. It may take up to two weeks for the plants to start growing.
Ideal Conditions: Maintain a consistent temperature of 70-90ºF in the germination area. Use purified room-temperature bottled water with a pH level between 5.5 and 7.
Keep the seeds away from light, allowing exposure for less than 1 minute before and during germination. Avoid touching the seeds or applying pressure to them.
Record Keeping: To qualify for the three month germination guarantee, it is necessary to follow all the steps outlined in our germination guidelines. Please do not use alternative germination methods, such as using a water bottle or planting directly into soil. Document the germination process through photography or video, as it will be requested when assessing claims for replacement products.
How to grow weed Grandaddy Black strain?
Grandaddy Black seeds can be grown indoors or outdoors under optimal conditions, to avoid any problems during their development. Although they are compact and robust, moderately easy to grow and hardy, we should always prevent any pests.
You can use different growing methods to retain and enhance the terpenes and flavors of your Feminized Grandaddy Black buds.
- Use a quality substrate. Perlite, peat or coco coir are ideal for moisture retention.
- Thanks to the experience of our customers with our Feminized Grandaddy Black seeds, we know that we can increase yields up to 20%.
For optimal indoor cultivation, Blimburn Seeds advises wide, vertical spaces and the use of the ScrOG method to obtain a uniform plane and increase the size of the lower flowers. If you plan to grow our Feminized seeds outdoors, we have developed a grow guide for optimal cultivation in any area of the world. Marijuana seeds for sale.
Remember that our cannabis plants also need good nutrients when our Feminized seeds are seedlings, in their vegetative period and finally in their flowering period.
When you grow cannabis seeds outdoors, choose the best date for your crop, a place where our cannabis plants receive the most hours of sunshine.
If on the other hand you like to grow your Feminized seeds indoors and you have good tents, textile pots for growing, led lighting, air extractor, to circulate clean air and of course a good carbon filter to avoid problems with neighbors or the law.
Keep daytime temperatures between 68℉-80℉ and nighttime temperatures between 7℉-9℉ cooler.
Feminized plants need low humidity to thrive. Keep relative humidity (RH) levels at 55%-60% during the vegetative phase. Reduce RH to around 40% during the flowering phase. By harvest time, you can reduce RH to 30%.
Outdoors, breeders in the northern hemisphere should sow their cannabis seeds in April for harvest in mid October. Healthy Feminized Grandaddy Black seeds produce about 15 oz/plant | 450 gr/plant of buds each.
Indoors, these crops have a flowering time of 8 – 10 weeks and produce about 1.64 – 1.97 oz/ft2 | 500 – 600 gr/m2.
If you plan to grow our feminized seeds outdoors, we have developed a grow guide for optimal cultivation in any area of the world.
Grandaddy Black Seeds Flowering Time
The Grandaddy Black strain has a flowering time of approximately 8 to 10 weeks, making it a relatively quick option for growers. Its Indica-dominant genetics ensure dense buds that are coated in a layer of trichomes, offering a potent final product.
Growers cultivating Grandaddy Black seeds can expect excellent yields of high quality buds with vibrant purple hues and a sweet aroma. Proper care during the flowering phase will help maximize the strain’s potential.
Ideal Climate for Growing
Grandaddy Black is a strain appreciated for its potency and compact stature, thriving in a Mediterranean or temperate continental climate, ideal for its intensive growth. The optimum temperature range for cultivating Grandaddy Black falls between 70–85°F (21–29°C). It’s essential to maintain temperature consistency and ample amounts of sunlight exposure, which yields better results for indoor facilities with advanced climate control features. Additionally, the annual rainfall required lies in 15–30 inches (380–760 mm) range, provided the soil has adequate draining qualities to avert root decay.
For cultivators in the U.S., the states providing the most favorable conditions for growing Grandaddy Black include California, Nevada, New Mexico, Arizona, and Texas. Florida also provides a conducive environment due to its humid subtropical climate. The regulation of controlled environments and adhering to ideal cultivation temps can result in generous harvests, accentuating its dense, resinous buds. Grow your Grandaddy Black in these ideal conditions to unlock its full potential and abundant yields.
What does the strain smell like?
The buds of the Grandaddy Black strain are rock hard, soaked in resin and often have a crystalline sheen due to the amount of trichomes. They almost look like they came out of the moon and are excessively covered with resinous trichomes.
Marijuana seeds of your own? The strain is an Indica dominant strain made by crossing two legendary strains from the world of cannabis. The taste and flavor can be described as the perfect blend of Earthy, Fruity, Sweet.
This strain makes a delicious soft smoke and combines a wide range of effects while a strong and relaxing experience. It´s rare genes produce a premium weed that is hard to beat. Thanks to its large resin production, it is the ideal strain for the production of high-quality extracts and concentrates.
A good terpene profile enhances the flavors of the buds of cannabis plants. Terpenes are volatile organic compounds that are produced in the cannabis plant and have an effect on the aroma and flavor of the buds.
These terpenes act as a kind of energizer for the flavors of the buds, as they add a fresh, citrusy touch to the sweeter flavors found in the buds. On the other hand, terpenes also have an effect on the effect that cannabis produces when smoked, as some terpenes have sedative properties, while others can act as stimulants.
For this reason, it is important to know the different terpenes found in a given cannabis strain before smoking it, in order to get the most out of the flavors and effects they produce.
Experiencing the strain
Grandaddy Black is one of the best marijuana strains available in our catalog with more than 1000 strains. An herb with a Medium THC of 19% – 23% that gives us a state of happiness, concentration and relaxation.
This mostly Mostly Indica marijuana is considered one of the most potent within the cannabis community. The strain is the perfect strain to relax, but it will also take you to a state of happiness and concentration. It can make anyone feel cheerful and happy.
This strain is perfect to consume in the evening after a long day. It is a marijuana plant with Mostly Indica structure. A large stem that supports its satellite branches and that we can grow both indoors and outdoors, obtaining a similar production but with a higher yield when it is fed with all the hours of sunshine outdoors.
Our Grandaddy Black seeds are a Mostly Indica strain that has a flowering period of 8 – 10 weeks. Remember that in each period of cultivation of our marijuana plant it is important to provide it with the corresponding nutrients to obtain resinous buds and trichomes.
Enjoy a unique experience and buy Feminized Grandaddy Black seeds in our online seed bank, blimburnseeds.com.
Grandaddy Black strain terpenes
Arthritis: The appearance of Delta 3 Carene and Linanool terpenes is a trigger for the reduction of Arthritis. When Alpha-pinene and Beta-pinene terpenes are present, it is a great ally for Arthritis, asthma and anti-inflammatory problems. It is present in Spicy, Floral, Lavender, Mint, Cinnamon, Cilantro, Woody notes and Pine.
Sleepy: The combination of terpenes such as Myrcene, Terpineol and in high percentage Linalool provides us with a sedentary and sleepy state.
Pain: The appearance of the terpenes Myrcene and Humelene is a trigger for pain reduction. When the terpene Eucalyptol is present, it is a great ally in reducing chronic pain. It is present in earthy, musky, woody and spicy aromas and in the terpene Eucalyptol Mint.
THC | Medium THC |
---|---|
THC % | 19% - 23% |
CBD | Low CBD |
CBD % | 2% |
Lineage | Black Domina\'98 x Grandaddy Purple |
Type of Seed | Feminized |
Genetic | Mostly Indica |
Yield | Medium |
Yield Indoor | 1.64 - 1.97 oz/ft2 | 500 - 600 g/m2 |
Yield Outdoor | 15.87 - 15.87 oz/plant | 450 - 450 g/plant |
Height | 4.92 ft | 1.5 m |
Flowering Time | 8 - 10 Weeks |
|
Tropical |
Harvest Month | All Season |
Beginner | For Beginners |
Medical | Arthritis, Insomnia, Pain |
Effects | Aroused, Energetic, Relaxed |
Flavors | Earthy, Fruity, Sweet |
Terpenes | Alpha Terpineol, Linalool, Valencene |
Flavor
earthy
fruity
sweet
Effect
aroused
energetic
relaxed
Medical
arthritis
insomnia
pain
Grandaddy Black Strain Reviews
Very good products! Informative website and timely with orders

Merci pour la livraison 🚚 rapide je suis très satisfait. Pour les semences je donne 4 sur 5 très bon désormais je vais faire mes commende chez vous merci encore un Québécois du Canada 🇨🇦 👍👍👍

Very happy with the result. Smooth smoke, not mind blowing just a happy mellow.

I have bought seeds from various companies in past. Blimburn has some great prices and arrival time was short.
