Critical Daddy Purple is a Blimburn Seeds hybrid bred for big harvests and a smooth, sociable effect. From Critical Mass x Granddaddy Purple, it combines Critical Mass’s famous yield with Granddaddy Purple’s relaxing, fruity character. It is a balanced 50/50 hybrid at 19% THC, with a short-to-moderate 8-10 week flowering time and genuinely heavy yields, which makes it a rewarding grow for beginners and experienced growers alike.
This is a photoperiod feminized strain, so it flowers when you shorten the light cycle. Note that this is a distinct Blimburn cross, not the same as pure Granddaddy Purple. The figures below are Blimburn breeder values; check your own pack for the exact numbers.
Recommended Strains
Critical Daddy Purple
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THC | 19% (Medium) |
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Lineage | Critical Mass x Granddaddy Purple |
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Type | Feminized |
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Height | 4.92 ft | 1.5 m |
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Yield | High |
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Yield Indoor | 1.97 oz/ft² | 600 g/m² |
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Yield Outdoor | 21.16 - 24.69 oz/plant | 600 - 700 g/plant |
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Flowering Time | 8 - 10 weeks |
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Phenotype | 50% Indica / 50% Sativa |
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Medical | Arthritis, Insomnia, Pain |
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Effects | Happy, Relaxed, Talkative |
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Flavors | Fruity, Woody |
Apple & Bananas
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THC | 26% - 27% (High) |
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Lineage | Platinum Cookies x Grandaddy Purple x Blue Power x Gelatti |
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Type | Feminized |
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Height | 5.25 ft | 1.6 m |
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Yield | High |
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Yield Indoor | 1.64 - 1.8 oz/ft² | 500 - 550 g/m² |
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Flowering Time | 8 - 10 weeks |
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Phenotype | 50% Indica / 50% Sativa |
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Effects | Creative, Uplifted, Happy |
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Flavors | Earthy, Fruity, Pine |
Critical Daddy Purple Grow Info
| Trait | Critical Daddy Purple (Blimburn Seeds) |
| Genetics | Critical Mass x Granddaddy Purple |
| Seed type | Feminized (photoperiod) |
| Genetic profile | 50% indica / 50% sativa (balanced) |
| THC | 19% (medium) |
| Flowering time | 8-10 weeks |
| Height | About 1.5 m |
| Indoor yield | High, up to 600 g/m² |
| Outdoor yield | 600-700 g per plant |
| Effects | Happy, relaxed, talkative |
| Flavor | Fruity, woody |
These are Blimburn’s published figures for the Critical Daddy Purple line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Critical Daddy Purple seed pack.
What Makes Critical Daddy Purple Worth Growing
The headline is yield. The Critical Mass parent is one of the biggest producers in cannabis, and Critical Daddy Purple inherits that, with up to 600 g/m² indoors and 600-700 g per plant outdoors. Pair that with a manageable size and an easy grow, and it is a lot of harvest for the effort.
The effect is the other draw. At a comfortable 19% THC it gives a happy, relaxed, talkative feel that suits social settings as much as a quiet unwind, balanced rather than one-sided. The Granddaddy Purple side lends a fruity, slightly woody flavor, and with cool nights late in flower the buds can take on purple hues. It is a crowd-pleaser that does not demand much.
Is Critical Daddy Purple Indica or Sativa?
Critical Daddy Purple is a balanced hybrid, listed at 50% indica and 50% sativa, so it does not lean firmly either way.
That balance shows in the plant and the effect. The plant is a medium, productive, trainable bush, easy to keep in a tent. The high pairs a happy, sociable, talkative lift with a relaxed body feel, so it works through the day as well as the evening rather than locking you to the couch.
Flowering Time and Total Grow Time
Because Critical Daddy Purple is a photoperiod strain, two timing numbers matter, and they are not the same.
- Flowering time: 8-10 weeks. This is the bloom stage, and it starts only when you switch the lights to 12/12 indoors, or the outdoor days shorten in late summer.
- Total grow time (seed to harvest): flowering plus your veg period. Veg length is yours to set, so a typical indoor run from seed lands around 12-16 weeks depending on how long you veg.
The practical point is that the 8-10 week figure is the flowering window, not the whole grow. You decide the veg length, and that is the main lever for final plant size.
Does Critical Daddy Purple Need a 12/12 Light Cycle?
Yes. Critical Daddy Purple is a photoperiod strain, so indoors it needs a 12/12 light cycle to start flowering. You veg it under a longer schedule, usually 18/6, then switch to 12 hours on and 12 off to trigger bloom.
Outdoors the season does this for you, with flowering starting as the days shorten in late summer. This is the key difference from an autoflower, which blooms on age no matter the light schedule.
Critical Daddy Purple Grow Timeline, Week by Week
Veg length is up to you, so the flowering weeks are the fixed part. Adjust the start to suit your space.
- Weeks 1-2: germination and seedling. The taproot and first leaves establish. Keep water light and conditions stable.
- Weeks 3-5: vegetative growth. The plant builds a productive frame. Top it and start LST or a SCROG net to spread the canopy, since this is a heavy yielder that rewards an open structure.
- Flip to 12/12: switch the light cycle at about two thirds of your target height, to leave room for the stretch.
- Flower weeks 1-3: the stretch and first pistils. Set your supports for the heavy colas to come.
- Flower weeks 4-8: buds stack and fatten, and the fruity, woody aroma builds. Cool nights now can bring out purple.
- Flower weeks 8-10: ripening and harvest. Judge by the trichomes, not the day count.
Choosing Your Setup: Space, Light and Pots
Critical Daddy Purple is easy to house for the yield it gives. At around 1.5 m it suits a standard tent with a short veg, and its productive structure is made for SCROG and SOG setups that flatten the canopy and support the heavy buds.
Light should be strong to feed those big flowers. A full-spectrum LED at 30-40 watts per square foot over a trained canopy is what gets you toward the 600 g/m² ceiling. Pair it with good exhaust and airflow through flowering, since dense, heavy colas need support and air.
For containers, use 3-5 gallon pots indoors, or larger fabric pots and open ground outdoors where it can really load up. As a photoperiod, it transplants fine, so you can pot up as it grows.
Germinating and Raising Seedlings
The paper towel method is the easy, reliable start. Soak the seeds for 12-24 hours, then set them between damp paper towels on a covered plate, kept dark and warm at 70-85°F (21-29°C). A taproot usually shows in two to three days.
When the root reaches about 1-2 cm, plant it root-down a knuckle deep in a light, airy mix and keep the surface moist until it breaks ground. New to germination? Our beginner growing guides walk through it step by step.
The Vegetative Stage and Training
Because Critical Daddy Purple is a photoperiod plant, you can veg as long as you like and use the full training toolkit, which autoflowers cannot handle.
With a heavy yielder, training is how you realize the potential. Top it early to build multiple colas, then use LST or a SCROG net to spread the branches into a flat, even canopy so light reaches more bud sites. Keep nitrogen available through veg, and plan supports for flower, because the dense buds get heavy enough to bend branches.
Feeding and Watering Critical Daddy Purple
Feed to match the yield. This is a hungry, productive hybrid, so it takes a full bloom schedule, but build it up gradually and read the leaves rather than chasing the bottle. Use a nitrogen-forward base through veg, then shift to a bloom formula higher in phosphorus and potassium once you flip to 12/12.
Water by root-zone moisture. A big, productive plant drinks heavily in late veg and flower, so expect demand to climb, and let the top layer dry between waterings to keep oxygen at the roots.
Flowering and Knowing When to Harvest
After the flip, the plant stretches for two to three weeks, then settles into heavy bud production. The fruity, woody aroma builds through the middle weeks, and the Granddaddy Purple heritage can bring purple tones if nights cool late in flower. Support the colas and keep air moving around the dense canopy.
As the 8-10 week window closes, let the trichomes decide. Harvest when most are cloudy with a few amber. After the cut, hang the branches in the dark at about 60°F (15-16°C) and 55-60% humidity for 7-14 days, then cure in jars, burping daily for the first weeks.
Growing Indoors vs Outdoors
Indoors, the manageable height and SCROG-friendly structure make Critical Daddy Purple a big yielder in a standard tent. Keep a flat, well-supported canopy under strong light and the 600 g/m² figure is reachable.
Outdoors, it really stretches its legs, thriving in temperate climates with ample sun and returning a huge 600-700 g per plant. Plant after the last frost, give it full sun and a large root run, and stake the heavy branches well before harvest.
How Tall and How Much? Height and Yield
Height is easy to manage. At around 1.5 m, Critical Daddy Purple fits indoor tents with a short veg, and topping and training keep the canopy flat.
Yield is the standout: up to 600 g/m² indoors and 600-700 g per plant outdoors. Those are top-end breeder figures, so strong light, canopy management, good support for the heavy buds, and healthy roots are what move you toward them.
Best US Climates for Critical Daddy Purple
Critical Daddy Purple does best in temperate to warm climates with plenty of sun. Growers in California and the West get easy outdoor finishes and huge plants.
Its reasonable flowering time also suits temperate and northern states, where cool autumn nights can even deepen any purple color before the plant finishes. In the humid Southeast, support the heavy buds and keep airflow strong to protect the dense colas. For other varieties, browse our full how-to-grow library.
Common Problems When Growing Critical Daddy Purple
A few predictable issues are easy to avoid on a heavy yielder.
Not supporting the heavy buds
Critical Mass genetics make the colas dense and heavy enough to snap branches. Add stakes or a trellis before flower gets heavy, especially outdoors.
Flipping to 12/12 too late
The plant stretches in early flower. If you flip when it is already near your light, the stretch pushes the colas into the lamp. Flip at about two thirds of your target height.
Humidity in dense buds
Big, dense flowers trap moisture and can rot. Keep late-flower humidity down and air moving through the canopy to protect the harvest.
Underfeeding a heavy yielder
This is a hungry hybrid. Feeding it like a light plant leaves yield on the table, so build the bloom feed up gradually to match its vigor while watching for burn.
Making the Most of Your Harvest
Do not waste the trim. A big yielder leaves plenty of resinous sugar leaf for bubble hash, dry sift, or infused oil. The stems, roots, and fan leaves compost well and feed your next grow.
Is Critical Daddy Purple Right for You?
If you want big yields, an easy grow, and a smooth, sociable effect, yes. Its Critical Mass heritage makes it one of the more productive strains you can run, and the balanced high suits most of the day. Just plan support for the heavy buds. If you want the pure parent, see our Granddaddy Purple grow guide.
Frequently Asked Questions
Is Critical Daddy Purple indica or sativa?
Critical Daddy Purple is a balanced hybrid, listed at 50% indica and 50% sativa, from Critical Mass and Granddaddy Purple. The effect is happy, relaxed, and talkative, pairing a sociable lift with a comfortable body feel, so it works through the day. In the garden it grows as a medium, productive, trainable plant.
Does Critical Daddy Purple need a 12/12 light cycle?
Yes. Critical Daddy Purple is a photoperiod strain, so indoors it needs the light switched to 12/12 to start flowering. You veg it under a longer schedule like 18/6, then flip to 12 hours on and 12 off. Outdoors it flowers naturally as late-summer days shorten.
How long does Critical Daddy Purple take to flower?
Critical Daddy Purple flowers in about 8 to 10 weeks once you switch to 12/12. That is the bloom stage only. Total time from seed also includes your veg period, usually a few weeks, so plan the overall grow around flowering plus however long you choose to veg.
How much does Critical Daddy Purple yield?
Critical Daddy Purple is a heavy yielder thanks to its Critical Mass side: up to 600 g/m2 indoors and 600 to 700 g per plant outdoors in good conditions. Those are top-end breeder figures, so strong light, canopy management, bud support, and healthy roots move you toward them.
How tall does Critical Daddy Purple grow?
Critical Daddy Purple reaches around 1.5 m, which is manageable for an indoor tent, especially with a short veg. You can keep it tighter by topping and flipping to 12/12 earlier, or give it more veg and open ground outdoors to grow a larger, even higher-yielding plant.
How strong is Critical Daddy Purple?
Critical Daddy Purple sits at a comfortable 19% THC, medium by modern standards. The effect is balanced and approachable rather than overwhelming: happy, relaxed, and talkative, which makes it a good social or all-day strain and a sensible choice for less experienced users who want a smooth, manageable high.
Can you clone Critical Daddy Purple?
Yes. As a photoperiod strain, Critical Daddy Purple clones well, unlike autoflowers. Take cuttings from a healthy plant during veg, root them, and keep them under long light until you are ready to flower. Cloning lets you keep a favorite high-yielding phenotype and skip germination on your next run.
