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Grandaddy Black feminized seeds from Original Sensible Seeds are your ticket to cultivating a legendary, couch-locking indica hybrid renowned for its stunning color, heavy yields, and devastatingly potent effects.
Ever feel like your relaxation ritual is missing that final, knockout punch? You know, that moment where stress melts away, your body sinks into the sofa, and your mind finally switches off. Many strains offer a chill vibe, but they leave you halfway there—still aware, still a little tense. Grandaddy Black doesn't do halfway. This is the strain that finishes the job, wrapping you in a deep, sedative blanket of calm that's perfect for turning a long day into a peaceful night.
When you're flying solo, Grandaddy Black becomes your personal sanctuary. Its effects are profoundly physical and mentally soothing, making it the ultimate companion for solo sessions dedicated to deep relaxation. The high comes on with a gentle, euphoric wave that quickly settles into a full-body stone. Muscles unclench, worries fade into the background, and a heavy sense of contentment takes over. It's the perfect strain for late-night gaming, getting lost in a movie, or simply enjoying the quiet after everyone else has gone to bed. The sweet, grape-like flavor makes the experience even more enjoyable, turning a simple smoke into a decadent treat.
Sharing Grandaddy Black transforms a social gathering into a collective chill-out session. It's not a racy, talkative high; it's a bonding experience in tranquility. Passing a joint of this around tends to slow the conversation to a comfortable, mellow pace, perfect for deep talks or shared silence. Everyone sinks into the same relaxed state, making it ideal for small, intimate groups where the goal is to unwind together. Just be prepared for the session to naturally wind down—this isn't the strain for keeping the party going all night. It's for those moments when you and your crew are ready to just vibe and decompress.
Grandaddy Black is a versatile strain, but knowing when to deploy it maximizes the experience. Its deeply sedative nature makes it best suited for the latter part of the day.
Yes, its indica-dominant genetics make it relatively forgiving and straightforward to grow. It stays compact and is resistant to common molds, making it a great choice for novice cultivators looking for a high-yielding, potent strain.
It boasts a complex aroma and flavor profile dominated by sweet, fruity grape notes inherited from its Grandaddy Purple parent, layered over a deeper, earthy hashiness from the Black Domina. The dominant terpenes are myrcene, caryophyllene, and pinene.
Indoors, Grandaddy Black has a relatively short flowering time of just 60 to 65 days. Outdoors in the Northern Hemisphere, plants are typically ready for harvest around the end of September or early October.
This is a generous yielder. Indoors, you can expect around 600 g/m² (approx. 1.98 oz/ft²). Outdoors, with good conditions, plants can produce up to 800 g (1.76 lb) per plant.
Quick Overview: A robust, indica-dominant photoperiod from Original Sensible Seeds with a 60–65 day flowering time, ideal for indoor tents or sunny outdoor spots.
Safe Start & Seedling Stage: Germinate using the paper towel method or plant directly into a light, pre-moistened seedling mix. Maintain high humidity and temperatures around 22–26°C (71.6–78.8°F). For stronger, stress-resistant roots from the start, consider adding a root stimulator like Funky Fungi B.A.C to your substrate.
Vegetative Growth: Keep plants under an 18/6 light cycle. This strain exhibits moderate stretch, so some low-stress training (LST) is beneficial to open up the canopy. It thrives in an airy substrate. Water when the top layer of soil is dry and maintain a pH of 6.0–6.5.
Flowering & Ripening: Switch lights to 12/12 to induce flowering. Support heavy colas with stakes or a SCROG net as buds swell. In the final weeks, reduce humidity to 40–50% to prevent mold and consider a bloom booster to enhance resin production and bud density, such as Monster PK 58/60.
Harvest & Post-Harvest: Harvest when trichomes are mostly milky with some amber for a more sedative effect. Flush with plain water for 7–10 days prior. Dry slowly in a dark space at 18–22°C (64.4–71.6°F) and 50–60% RH for 10–14 days, then cure in jars for at least 2–4 weeks for optimal flavor and smoothness.
Grandaddy Black has been a staple in my personal garden for years, and it's my go-to when I need to absolutely guarantee a night of deep, uninterrupted sleep. The visual appeal alone is worth it—watching those buds darken to a near-black purple under cooler night temperatures is a grower's delight. On my own, I'll savor a bowl while listening to music, and within 45 minutes I'm perfectly content to just sit and let the world fade away. It's incredibly effective for turning off a busy mind.
When I share it, it's usually with one or two other people who appreciate a heavy indica. We know what we're in for: conversation will slow, movies will get paused, and snacks will be consumed. It's not a social lubricant; it's a social relaxant. Pro tip: because of its potency, I always advise friends to take it easy on their first try. A little of this feminized powerhouse goes a very long way. For best results, I grow it in a rich, organic soil and keep feeding simple, especially in the final weeks to let those gorgeous colors and flavors shine through.
| Type: | Feminized | |
| Banks: | Original Sensible Seeds | |
| Genetics: | Grandaddy Purple x Black Domina | |
| Phenotype: | Indica dominance | |
| Harvest outdoor H.N: | Early October | |
| Harvest outdoor H.S: | Early April | |
| Indoor production: | 600 gr/m2 | |
| Outdoor production: | Up to 900 gr/plant | |
| Indoor flowering period: | 8 - 9 weeks | |
| THC: | 23% |
Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.
Yes, we ship to almost every country in the world although you need to know the current legislation in your country to make sure that you do not break any regulations with the germination of the seeds.
UK: 3-4 days (express)
USA: 4-5 days (express)
Australia: 4-5 days (express)
Japan: 4-5 days (express)
Canada: 4-5 days (express)
South Africa: 4-5 days (express)
New Zealand: 5-7 days (express)
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If you live in a country where the cultivation of cannabis is legal and you decide to plant the seeds, it is good that you know that all the seeds that we commercialize have germination guarantee.
If you germinate with the method of paper napkins and you have followed all the steps that we indicate here, you will only have to return us the seeds not germinated in their original packaging and when we receive them we will proceed to the change.
Then we take care of requesting the return to the seed bank, we do not transfer this responsibility and time to our customers.
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