How to Grow Grandaddy Purple x Do-Si-Dos
Grandaddy Purple x Do-Si-Dos is a feminized, indica-dominant hybrid prized for its purple-tinged, resinous buds and a deeply relaxing, happy high. It carries a high 20–24% THC, a fruity, orange and sweet flavor, and a happy, relaxed, munchie-inducing effect on a sturdy, generous plant with elite purple heritage.
Bred from Grandaddy Purple crossed with Do-Si-Dos, this is an 80% indica, 20% sativa feminized strain with serious pedigree. The Grandaddy Purple side (from Purple Urkle and Big Bud) brings deep, relaxing body genetics and rich purple colour, while Do-Si-Dos (from Girl Scout Cookies and OG Kush) adds potency, sweetness and a dense, frosty bud structure.
Recommended Strains
Grandaddy Purple x Do-Si-Dos
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THC | 20% - 24% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 80% Indica / 20% Sativa |
Grandaddy Purple Regular
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THC | 22% - 24% (High) |
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Type | Regular |
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Yield | High |
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Phenotype | 60% Indica / 40% Sativa |
Because it is sturdy, resinous and seriously potent, Grandaddy Purple x Do-Si-Dos is a rewarding and approachable grow. You can see the full genetics and buy Grandaddy Purple x Do-Si-Dos feminized seeds on the strain page, and browse more of our high-THC seeds alongside it.
Strain Profile at a Glance
| THC | 20–24% (high) |
|---|---|
| Lineage | Grandaddy Purple x Do-Si-Dos |
| Type | Feminized |
| Genetics | 80% Indica / 20% Sativa |
| Climate | Temperate |
| Flowering time | 8–10 weeks |
| Harvest | October |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.47–1.8 oz/ft² (450–550 g/m²) |
| Yield outdoor | 10.58–15.87 oz/plant (300–450 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Fruity, Orange, Sweet |
| Effects | Happy, Relaxed, Munchie-inducing |
Promos & Deals
Climate and Where to Grow It
Grandaddy Purple x Do-Si-Dos does best in a temperate climate with plenty of light and good airflow. It is a sturdy, adaptable plant that performs both outdoors in a warm season and in a controlled indoor tent, reaching a medium 1.5 m, so it fits most spaces without demanding a tall room as it moves into flower.
Outdoors it finishes around October and rewards a good spot with 300–450 g per plant, while indoors it produces a strong 450–550 g/m². Those are solid numbers for a plant this manageable, but they depend on light, pot size and canopy health, so give it room and feed it steadily to reach the top of the range.
Indoors, aim for daytime temperatures around 70–82°F (21–28°C) and keep steady airflow moving through the canopy. Cooler nights late in flower can help bring out the strain’s purple hues. Its dense, resin-heavy indica buds hold moisture, so keep humidity in check as flowering fills in and support the branches as the colas swell.
Growing Feminized Photoperiod Seeds
As a feminized strain, every seed grows into a flowering female, so there is no need to sex the plants or remove males. That keeps the grow simple and means no wasted time or tent space on plants you would only cull later, which is part of why Grandaddy Purple x Do-Si-Dos stays beginner-friendly.
Being a photoperiod plant, it flowers on a light change rather than on age. Grow it under a long day (around 18 hours of light) through the vegetative stage, then switch to a 12/12 cycle to trigger flowering. A longer veg builds a bigger frame and a heavier harvest, while a shorter veg keeps the plant more compact in a small space.
Feeding Schedule (EC Guide)
This is a resinous, high-THC indica that sets dense, sticky buds, so feed it steadily but without overdoing it. Start low, build up as the plant asks for more, and taper right off for the final flush so the fruity, orange and sweet notes come through clean and the smoke finishes smooth.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4–0.6 | Very light feed, focus on healthy root growth |
| Vegetative growth | 0.8–1.2 | Build the frame, raise nitrogen gradually |
| Early flower | 1.2–1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4–1.6 | Peak bloom feed while the sticky buds swell |
| Flush | 0.0–0.4 | Plain water for the final 1–2 weeks |
Flowering and Harvest
Once you flip to 12/12, bloom runs about 8–10 weeks. As an 80% indica it stays sturdy and bushy through flower, filling in dense, chunky, resin-coated buds that gain weight and often take on purple tones through the second half of bloom rather than stretching tall the way a sativa would.
Give the colas light support as they fatten, and keep the canopy open so light reaches the lower flowers. Harvest when most trichomes have turned cloudy with a few amber heads for the fullest expression, and run a short plain-water flush in the last week or two before you cut the plant down.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15–18°C) and 55–60% humidity for 7–14 days, until the thin stems snap rather than bend. A slow, even dry stops the dense, sticky buds staying damp in the middle while the outside dries out, which protects both the sweet fruity aroma and the heavy resin.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure brings the fruity, orange and sweet grape notes forward and smooths the smoke, which is exactly what this potent purple Do-Si-Dos cross deserves.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Grandaddy Purple x Do-Si-Dos is a frosty, resin-rich plant, so the trim is excellent for dry sift, bubble hash or rosin, giving you a bonus run of sweet, fruity concentrate from material most growers would otherwise throw away.
Flavor and Terpenes
Grandaddy Purple x Do-Si-Dos has a rich, moreish profile: a sweet, fruity grape character with a bright orange citrus lift and a soft, earthy sweetness underneath. It is a smooth, dessert-like taste rather than a sharp or sour one, carried straight from its Grandaddy Purple and Do-Si-Dos parents into the cured flower, and it is a big part of the strain’s appeal.
Its terpene profile is led by limonene for the orange-citrus lift and myrcene for the sweet, fruity base, with caryophyllene adding a soft peppery backbone, humulene an earthy, grounding depth, linalool a gentle floral touch and pinene a clean, fresh top note. The sweet grape character comes through from the Grandaddy Purple parentage, layered over that citrus-and-earth terpene base.
Effects and Best Use
With its indica-dominant genetics, Grandaddy Purple x Do-Si-Dos is reported as happy, relaxed and munchie-inducing, a comfortable, full-bodied wind-down lifted by a cheerful, euphoric mood. It is best kept for the evening, easing gently into deep physical relaxation, and it tends to bring on a healthy case of the munchies, so keep snacks handy.
At a high 20–24% THC it is genuinely potent, so newer users should start low and build up, while experienced users will appreciate the depth and heavy resin it brings. That character, the sweet fruity-orange flavor, the elite purple heritage and the sturdy, generous plant are exactly why growers reach for Grandaddy Purple x Do-Si-Dos.
Common Problems and Pro Tips
The main thing to watch with Grandaddy Purple x Do-Si-Dos is humidity around its dense, resin-heavy indica buds. Those sticky, chunky colas trap moisture, so bud rot is the most common problem in the final weeks of flower. Keep humidity moderate through the second half of bloom, run steady airflow, and a light defoliation of the inner canopy helps air reach the thickest buds.
Branch support and colour are the other things to plan for. Buds this dense put real weight on the branches, so train or stake the plant early to keep it upright as the colas pack on weight. If you want to bring out its purple tones, let night-time temperatures drop a little in late flower, which encourages the colour without harming the plant.
As a pro tip, protect the sweet fruity flavor that makes this strain special: keep the feed moderate rather than heavy, since overfeeding can mute the limonene and the sweet grape notes, and give it a clean plain-water flush in the final one to two weeks. Follow the trichomes rather than the calendar at the end, then dry slowly and cure for three to four weeks for the smoothest, most expressive smoke.
FAQ
Is Grandaddy Purple x Do-Si-Dos indica or sativa?
It is strongly indica-dominant, at roughly 80% indica and 20% sativa, from its Grandaddy Purple and Do-Si-Dos parents. That shows in a deep, comfortable body relaxation best suited to the evening, while the small sativa share and a euphoric mood lift keep the experience happy and pleasant rather than purely heavy and flattening.
What does Grandaddy Purple x Do-Si-Dos taste like?
It has a sweet, dessert-like flavor: a fruity grape character with a bright orange citrus lift and a soft, earthy sweetness underneath. Limonene drives the orange-citrus note, myrcene adds the fruity base, and caryophyllene brings a gentle peppery backbone, while the sweet grape comes through from its Grandaddy Purple side.
What is Grandaddy Purple x Do-Si-Dos’s THC level?
It carries a high THC of 20–24%, so it is genuinely potent rather than mild. That strength drives a happy, relaxed, munchie-inducing effect that stays comfortable, but newer users should start with a small amount and build up slowly, while experienced users will enjoy the depth and heavy resin it delivers.
How long does Grandaddy Purple x Do-Si-Dos take to flower?
About 8–10 weeks once you switch to a 12/12 light cycle, with outdoor plants finishing around October. It is a photoperiod feminized strain, so it blooms on the light change rather than on age, filling in dense, resinous buds that often take on purple tones through the second half of flowering as they gain weight.
How much does Grandaddy Purple x Do-Si-Dos yield?
It is a generous producer for a manageable plant, giving around 450–550 g/m² indoors and 300–450 g per plant outdoors in a warm, temperate spot. Those numbers depend on light, pot size and canopy health, so give it room, support the branches, and feed it steadily through flower to reach the top of the range.
Does Grandaddy Purple x Do-Si-Dos turn purple?
Often, yes. Its Grandaddy Purple heritage gives it a genetic tendency toward purple tones, which show up most in the buds and leaves late in flower. Cooler night-time temperatures in the last couple of weeks of bloom help bring that colour out, though the exact shade varies from plant to plant and grow to grow.
