Chemdog #4 by Blimburn Seeds is a potent, mostly-indica hybrid that pairs classic Chem funk with a bright citrus-lemon twist. A cross of Chemdawg x Green Crack, it is a feminized photoperiod plant with a high 18-26% THC, a happy, relaxing, talkative effect, and a fast 7-9 week flowering time. It yields well, grows to a manageable size, and suits both new and experienced growers, which makes it a rewarding, high-potency choice.
This is a feminized photoperiod strain, not an autoflower, so it flowers when you shorten the light cycle and gives you full control over veg length, training, and cloning. The figures below are the breeder’s values; check your own pack for the exact numbers.
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Chemdog #4
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THC | 18% - 26% (High) |
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Lineage | Chemdawg x Green Crack |
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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 | 1.47 - 1.64 oz/ftĀ² | 450 - 500 g/mĀ² |
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Yield Outdoor | 21.16 - 24.69 oz/plant | 600 - 700 g/plant |
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Flowering Time | 7 - 9 weeks |
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Phenotype | 60% Indica / 40% Sativa |
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Medical | Arthritis, Insomnia, Pain |
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Effects | Happy, Relaxed, Talkative |
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Flavors | Citrus, Lemon |
Chemdog Seeds
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THC | 24% - 25% (High) |
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Lineage | OG Kush x Sour Diesel |
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Type | Feminized |
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Height | 5.25 ft | 1.6 m |
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Yield Outdoor | 35.27 oz/plant | 1000 g/plant |
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Flowering Time | 8 - 9 weeks |
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Phenotype | 70% Indica / 30% Sativa |
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Effects | Happy, Calming, Relaxed, Talkative |
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Flavors | Sour, Lemon, Earthy |
Chemdog 4 Grow Info
| Trait | Chemdog #4 (Blimburn) |
| Genetics | Chemdawg x Green Crack |
| Seed type | Feminized photoperiod |
| Genetic profile | 60% indica / 40% sativa |
| THC | 18-26% (high) |
| Flowering time | 7-9 weeks |
| Height | Around 1.5 m |
| Indoor yield | High, around 450-500 g/mĀ² |
| Outdoor yield | Around 600-700 g per plant |
| Effects | Happy, relaxed, talkative |
| Flavor | Citrus, lemon |
These are Blimburn’s published figures for Chemdog #4 at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Chemdog #4 seed pack.
What Makes Chemdog 4 Worth Growing
Chemdog #4 takes the legendary Chem lineage and brightens it with Green Crack’s citrus energy. The result is a happy, relaxing, sociable high at a potent 18-26% THC, with a flavor that blends classic Chem funk and sharp citrus-lemon. For fans of the Chemdawg family who want a little extra brightness and potency, it is a standout.
For the grower, it is fast and productive. It flowers in a quick 7-9 weeks, stays a manageable 1.5 m, and yields a high 450-500 g/mĀ² indoors. Its robust, forgiving nature suits beginners, while its potency and flavor satisfy experienced growers, a combination that makes it genuinely versatile.
Is Chemdog 4 Indica or Sativa?
Chemdog #4 is indica leaning, listed at 60% indica and 40% sativa, from its Chemdawg and Green Crack parents.
That near-balanced, indica-tilted mix gives it a happy, talkative, sociable high up front that eases into relaxation, so it is versatile across the day rather than purely sedative. The Green Crack side lends some sativa energy and citrus brightness, while the Chemdawg base brings potency, funk, and a sturdy, resinous structure.
Flowering Time vs Full Grow Time
Because Chemdog #4 is a photoperiod strain, these two numbers are separate, and mixing them up is the most common planning mistake.
- Flowering time: 7-9 weeks. This is the bloom stage, which starts only when you switch the lights to 12/12 indoors (or when days shorten outdoors). This is a fast bloom for such a potent strain.Ā
- Full grow time (seed to harvest): flowering plus however long you veg. Indoors, a typical grow runs around 4 months from seed, depending on veg length.Ā
The practical point: you control the total time by choosing your veg length. A longer veg means a bigger plant and harvest; a shorter veg gets you there faster. Outdoors, expect to finish around late September into early October.
Does Chemdog 4 Need a 12/12 Light Cycle?
Yes. Chemdog #4 is a photoperiod strain, so indoors it needs a 12/12 light cycle (12 hours on, 12 hours off) to start and maintain flowering.
Keep it on a long veg schedule, usually 18/6, for as long as you want it to grow, then flip to 12/12 when it has the size and shape you want. Account for the stretch so it stays under your height limit. Outdoors, shortening late-summer days trigger flowering naturally.
Chemdog 4 Grow Timeline, Week by Week
Treat this as a development pattern, not a fixed schedule, since veg length is up to you.
- Weeks 1-2: germination and seedling. The taproot and first true leaves establish. Keep humidity up and feeding minimal.Ā
- Weeks 3-5: vegetative growth (your choice). The plant builds its frame under 18/6. This is when you top and train.Ā
- Week 0 of flower: the flip. Switch to 12/12. Expect a moderate stretch.Ā
- Weeks 1-3 of flower: stretch and bud set. Vertical growth finishes and flower sites form.Ā
- Weeks 4-7 of flower: bud development. Resinous buds fill out and the citrus-lemon and Chem aroma builds.Ā
- Weeks 7-9 of flower: ripening and harvest. Judge by trichomes, not the calendar.Ā
Choosing Your Setup: Space, Light and Pots
Chemdog #4 reaches around 1.5 m with a moderate stretch, so flip to 12/12 while it is comfortably under your height limit. Low stress training or a SCROG net keeps the canopy even and lifts the yield.
Give it strong light to back the high THC and resinous buds. A full-spectrum LED at 30-40 watts per square foot over the flowering canopy keeps the colas dense. Add a good inline exhaust fan and a carbon filter, since the Chem and citrus aroma is pungent in flower.
For pots, 3-5 gallon containers suit most indoor grows, scaled to veg time and plant size. Fabric pots improve root airflow and help prevent overwatering.
Germinating and Raising Seedlings
The paper towel method is the simple, reliable start. Soak the seeds for 12-24 hours, then place them between damp paper towels on a covered plate, kept dark and warm at 70-85Ā°F (21-29Ā°C). A taproot usually appears within two to three days.
When the taproot reaches about 1-2 cm, plant it root-down a knuckle deep in a light mix and keep the surface moist until the seedling emerges. Hold off on nutrients at this stage. New to growing? Our beginner growing guides cover germination step by step.
The Vegetative Stage, Topping and Training
Veg is where you shape a photoperiod plant, and Chemdog #4’s sturdy, resinous frame responds well to training. Keep it under 18/6 with a nitrogen-rich feed and build a strong, even frame before you flower.
Topping the main stem early encourages multiple colas and a wider, flatter canopy, which spreads the yield. Combine it with low stress training or a SCROG net to expose more bud sites to light. This is also the stage to take clones: cut from a healthy plant in veg to preserve a phenotype you like, since photoperiods clone reliably. Finish training before the flip.
Feeding and Watering Chemdog 4
Feed to the stage. Use a nitrogen-forward base through veg, then move to a bloom formula higher in phosphorus and potassium once you flip to 12/12 and buds form. A potent, resinous hybrid handles a solid feed, but start moderate and increase based on how the plant responds rather than overfeeding early.
Water by root-zone moisture, not a timetable. Let the top inch or two of medium dry between waterings, then water thoroughly until a little drains. Fabric pots and this water-to-weight habit keep the roots healthy and prevent overwatering.
Flowering and Knowing When to Harvest
Once you flip to 12/12, expect a moderate stretch, then resinous buds fill out over the fast 7-9 week bloom. The pungent Chem funk and bright citrus-lemon aroma develop, so keep air moving and run a carbon filter indoors.
Let ripeness, not the calendar, decide the harvest. Check the trichomes under a loupe and cut when most are cloudy with a few turning amber for the fullest effect. After harvest, hang the branches in the dark at about 60Ā°F (15-16Ā°C) and 55-60% humidity for 7-14 days, then cure in sealed jars, burping daily for the first couple of weeks to protect the flavor.
Growing Indoors vs Outdoors
Indoors, Chemdog #4 rewards control. Hold 18/6 for veg, flip to 12/12, train the canopy even, and the high 450-500 g/mĀ² yield is very reachable under strong light, with a fast turnaround thanks to the short bloom.
Outdoors, it is a strong producer in a warm, sunny climate, returning around 600-700 g per plant and usually finishing around late September into early October. Its manageable height makes it easy to place, and the Chem genetics give good resin. Give it full sun, rich well-draining soil, and airflow around the buds.
How Tall and How Much? Height and Yield
Height is easy to plan for. Chemdog #4 reaches around 1.5 m with a moderate stretch, so flip early enough and train to keep the final canopy within your space.
On yield it is a strong producer, listed as high at around 450-500 g/mĀ² indoors and 600-700 g per plant outdoors. Strong light, a topped or SCROG canopy, and a healthy root zone are what turn that potential into real weight, and the resinous buds are great for both flower and extraction.
Best US Climates for Chemdog 4
Chemdog #4 does well in a warm, sunny climate, so growers in California, the Southwest, and warmer Western and Southern states can comfortably take it to a late-September-to-early-October finish outdoors. Its fast 7-9 week flower also makes it workable in cooler, shorter-season states, since it finishes early.
Its manageable size makes it a strong indoor choice anywhere. In the humid Southeast, keep airflow strong around the resinous buds. For more options, browse our full how-to-grow guide library.
Common Problems When Growing Chemdog 4
A few predictable issues are easy to head off.
Strong flowering odor
The Chem funk and citrus aroma is pungent. Run a carbon filter and good exhaust indoors if discretion matters.
Bud rot in dense colas
The dense, resinous buds can trap moisture. Keep humidity moderate in late flower and air moving through the canopy, especially outdoors.
Overfeeding a resinous hybrid
Start moderate and increase based on the plant’s response, watching the leaf tips for nutrient burn, rather than pushing a potent strain too hard.
Harvesting by the calendar
The 7-9 week window is a guide, not a cutting date. Read the trichomes and pistils before you cut, since phenotype and environment shift the timing.
Making the Most of Your Harvest
Do not waste the trim. The resinous sugar leaves make excellent bubble hash, dry sift, or rosin that keeps the Chem and citrus character. The stems, roots, and fan leaves compost well and feed your next grow.
Is Chemdog 4 Right for You?
If you want a potent, fast-flowering Chem hybrid with a bright citrus-lemon twist and a happy, sociable high, yes. Its strength, speed, solid yield, and forgiving nature make it a great all-rounder for most growers. If you want a mild strain or a pure daytime sativa, look elsewhere. Browse our full how-to-grow guide library for more.
Frequently Asked Questions
Is Chemdog 4 indica or sativa?
Chemdog #4 is indica leaning, listed at 60% indica and 40% sativa, from its Chemdawg and Green Crack parents. The high is happy, talkative, and sociable up front before easing into relaxation, so it is versatile rather than purely sedative. The Green Crack side adds sativa energy and citrus brightness, while Chemdawg brings potency and a sturdy, resinous structure.
How long does Chemdog 4 take to flower?
Chemdog #4 flowers in a fast 7 to 9 weeks once you switch to 12/12, quick for such a potent strain. Total seed-to-harvest time depends on your veg length, usually around 4 months indoors. Outdoors it finishes around late September into early October. Judge the finish by trichome maturity rather than the calendar, since conditions shift it.
Does Chemdog 4 need a 12/12 light cycle?
Yes. Chemdog #4 is a photoperiod strain, so indoors it needs a 12/12 light cycle to start and maintain flowering. Keep it on 18/6 during veg for as long as you want it to grow, then flip to 12/12 when it has the right size. Account for the stretch. Outdoors, shortening late-summer days trigger flowering naturally.
How much does Chemdog 4 yield?
Chemdog #4 is a high yielder, producing around 450 to 500 g/m2 indoors and 600 to 700 g per plant outdoors. Strong light, a topped or SCROG canopy, and a healthy root zone are what turn that potential into real weight. Its resinous buds also make the trim valuable for extraction as well as flower.
How strong is Chemdog 4?
Chemdog #4 is potent, listed at 18 to 26% THC and rated high. The effect is happy, talkative, and sociable before easing into relaxation, versatile but best for those comfortable with strong strains. Its blend of classic Chem funk and bright citrus-lemon flavor, plus the potency, makes it a genuine top-shelf Chem hybrid.
Can you clone Chemdog 4?
Yes. As a photoperiod strain, Chemdog #4 clones reliably. Take a cutting from a healthy plant during veg, root it, and keep it under 18/6 light. Cloning lets you preserve a standout phenotype and run repeatable harvests of the same potency and flavor without buying new seeds each time, which is a real advantage over autoflowers.
What does Chemdog 4 taste like?
Chemdog #4 has a bright citrus and lemon flavor layered over the classic Chem funk of its Chemdawg parent. To protect those terpenes, run a carbon filter in flower, dry slowly at around 60Ā°F with moderate humidity, and cure in sealed jars, burping daily for the first two weeks. A careful cure keeps the citrus and Chem notes sharp.
