Grand Daddy Black Feminized Seeds
Price range: US$37.25 through US$95.00
Grand Daddy Black is an indica-dominant feminized cross of Granddaddy Purple and Black Domina, with earthy, citrus and skunk taste notes. Its parents’ Leafly users most often report feeling relaxed, sleepy and happy.
- THC~22%
- Flowering8–10 wks
- GrowEasy
- TypeFeminized photoperiod
Strain Specifications
Specs and grow figures are a guide — results vary with phenotype, setup and grower. Checked October 2026.
Grand Daddy Black is an indica-dominant feminized strain, about 95% indica, bred from Granddaddy Purple and Black Domina, with earthy, citrus and skunk taste notes. It is also spelled Grandaddy Black and Granddaddy Black. Its THC is listed at about 22%, and it is an easy grow that flowers in about 8 to 10 weeks indoors.
History & lineage
Grand Daddy Black brings together two well-known indicas. Leafly credits Ken Estes with popularizing Granddaddy Purple in 2003, and in a Leafly interview Estes describes bringing it to Oakland, where within a month there were lines around the corner. Granddaddy Purple, one of its parents, won Best US Indica Flower at the 2015 High Times US Cannabis Cup in Denver (Herbal Healing’s entry, listed as Granddaddy Purps).
Black Domina is Sensi Seeds’ four-way hybrid of Northern Lights, Ortega, a hash plant and Afghani SA. Sensi says it has been popular with cannabis fans worldwide for over 20 years, and describes its foliage and buds as unusually dark. Original Sensible Seeds also sells a Grandaddy Black from this cross; it describes its version as compact, with green to purplish-black foliage and plump, resin-glazed buds, and rates it 95% indica. A cooler finish can deepen purple tones; our guide to purple cannabis strains explains why.
Aroma & flavour
Seed listings for Grand Daddy Black give its taste as earthy, citrus and skunk, and Original Sensible Seeds describes its version as earthy, sweet and fruity with a grape undertone. Leafly has no page for Grand Daddy Black itself. Of its parents, Leafly users most often describe Granddaddy Purple as grape, berry and sweet, and Black Domina as earthy, peppery and woody.
Effects, as users report them
There is no user-review data for Grand Daddy Black itself, so these are Leafly users’ reports for its two parents, Granddaddy Purple and Black Domina, which share the same order, most common first. Original Sensible Seeds lists its version’s effects as relaxing, euphoric and happy. The downsides the parents’ users report most are dry mouth, dry eyes and dizziness, and some report paranoia, headaches or anxiety. A cross won’t always feel like either parent, and effects vary with the person and the dose, so if you are new to cannabis, start with a small amount.
Growing Grand Daddy Black
Grand Daddy Black is a feminized photoperiod plant: it keeps growing leaves until the light drops to 12 hours a day indoors, or until the days shorten in late summer outdoors. Expect about 8 to 10 weeks of flowering indoors and an October harvest outdoors in the Northern Hemisphere; see our seed-to-harvest timeline to plan the run.
Original Sensible Seeds rates its version easy to grow. Expect up to about 450 g/m² (about 1.5 oz/ft²) indoors and up to about 600 g (about 21 oz) per plant outdoors. Published height figures for this cross are scarce, so as a rough guide based on its parents, plan on about 70–150 cm (2.3–4.9 ft). Give it good airflow and keep humidity under 50% in late flower to avoid bud rot. Judge when to harvest by the trichomes rather than the calendar.
Is Grand Daddy Black right for you?
- you want an indica-dominant cross of Granddaddy Purple and Black Domina
- you are newer to growing and want a plant rated easy
- you grow indoors or in a greenhouse, or outdoors where the season runs into October
- you want an uplifting, daytime-style strain — its parents’ users mostly report relaxed and sleepy
- you need a quick finish — see our fast-flowering strains
- you are new to cannabis and want something mild — THC is listed at about 22%
Questions buyers ask
Is Grand Daddy Black the same as Grandaddy Black?
Yes, it’s the same name spelled differently: seed companies sell this Granddaddy Purple × Black Domina cross as Grandaddy Black or Granddaddy Black, and we list it as Grand Daddy Black.
What are Grand Daddy Black’s genetics?
It is a cross of Granddaddy Purple and Black Domina, about 95% indica. Black Domina is Sensi Seeds’ four-way hybrid of Northern Lights, Ortega, a hash plant and Afghani SA.
Are these Grand Daddy Black seeds feminized?
Yes. They are feminized photoperiod seeds, bred to grow female plants, the ones that make buds. First time growing from seed? Our germination guide covers the first step.
How long does Grand Daddy Black take to flower?
About 8 to 10 weeks indoors once the light drops to 12 hours a day, with an October harvest outdoors in the Northern Hemisphere.
- Quebec Cannabis Seeds — cross, indica-dominant balance, THC, flowering, October harvest, yields, taste notes
- SeedFinder — Original Sensible Seeds’ description of its Grandaddy Black (foliage, buds, ease of growing, 95% indica)
- Leafly — Granddaddy Purple’s history and Ken Estes interview; user-reported effects and flavours for both parents (its Black Domina page too)
- Seed sellers’ pages — Sensi Seeds (Black Domina’s four-way cross and dark foliage); Zamnesia (Original Sensible Seeds’ data sheet for its Grandaddy Black: difficulty, ratio, effects)
- High Times (archived Cup results) — Granddaddy Purple’s 2015 Best US Indica Flower win (Herbal Healing’s entry)
Read Reviews from our Customers
Heavy Nights, Deep Relaxation
Grand Daddy Black came out dark, dense, and seriously frosty. Short, bushy plants with thick indica structure and tight internodes. The aroma was rich and earthy with grape, fuel, and a subtle pepper note once cured. Smoke is smooth but heavy—hits fast behind the eyes and melts straight into the body. Perfect late-night strain for stress, sleep, or shutting the world off. Not a daytime smoke unless you’ve got nothing planned.
Heavyweight Nightcap
This stuff is strong. Grand Daddy Black had my whole grow tent smelling like sweet berries and dark earth by week seven. Super easy grow with beautiful, dark purple buds and tons of frost. The high is heavy and sedating—perfect for evenings. I smoked a bowl after dinner and woke up still feeling relaxed. Definitely not one for running errands, but if you need something to knock out stress or help with sleep, this is the one.
Smooth, Sweet, and Sneaky
Grand Daddy Black crept up on me—in the best way. The flavor’s amazing: sweet, fruity, and just a little spicy on the exhale. Grows dense and dark with beautiful colors in late flower. Smokes real smooth, but don’t underestimate it—after a few hits I was sunk into the couch and smiling at nothing. Strong body buzz with a mellow, dreamy headspace. Great for pain or just tuning out the world. This one’s a keeper.
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