How to Grow Chemdog #4
Chemdog #4 is a sharp, aromatic, indica-dominant feminized strain that crosses the legendary Chemdawg with Green Crack. It is a 60/40 indica with a high 18-26% THC, a zesty citrus and lemon flavor, and a happy, talkative, relaxed effect. An Emerald Cup winner, it pairs a pungent, citrus-forward character with a fast finish and a generous harvest.
As a feminized strain, Chemdog #4 produces only female, flower-bearing plants, so you can skip sexing and remove the guesswork of sorting out males. Every seed goes toward productive, bud-growing plants from the start. You grow it under long days through its vegetative stage, then switch the lights to 12/12 to trigger flowering, which gives you full control over the plant’s final size and its timing.
Recommended Strains
Chemdog #4
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THC | 18% - 26% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 60% Indica / 40% Sativa |
CBD Chemdog #4
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CBD | 6% – 7% (Low) |
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Type | CBD Feminized |
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Yield | Medium |
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Phenotype | 55% Indica / 45% Sativa |
Potent, flavorful and beginner-friendly, Chemdog #4 is a rewarding strain to grow. You can see the full genetics and buy Chemdog #4 seeds on the strain page, and browse the rest of our feminized seeds alongside it.
Strain Profile at a Glance
| THC | High (18-26%) |
|---|---|
| Lineage | Chemdawg x Green Crack |
| Type | Feminized |
| Genetics | 60% Indica / 40% Sativa |
| Award | Emerald Cup winner (2012) |
| Climate | Temperate |
| Flowering time | 7-9 weeks |
| Harvest (outdoor) | September |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.47-1.64 oz/ft² (450-500 g/m²) |
| Yield outdoor | 21.16-24.69 oz/plant (600-700 g/plant) |
| Grow difficulty | Easy, beginner-friendly |
| Flavors | Citrus, Lemon |
| Effects | Happy, Relaxed, Talkative |
Promos & Deals
Growing a Feminized Strain
Chemdog #4 is a photoperiod feminized strain, which means it flowers in response to the light cycle rather than its age. You keep it under long days, usually 18 hours of light, for as long as you want it to grow and build structure, then switch to 12 hours of light and 12 hours of darkness (12/12) to tell the plant to start flowering. Because every seed grows into a female, there are no males to find and remove, so your whole crop goes toward buds.
That control over timing suits a manageable, indica-leaning plant like Chemdog #4 well. It has a medium 1.5 m frame with a moderate stretch after the flip, so flip it once it has filled your space, and use the vegetative stage to top and train it. Spreading the canopy opens up the many bud sites and helps every flower fatten evenly across its fast 7 to 9 week bloom.
Climate and Where to Grow It
Chemdog #4 suits a temperate climate and grows well both indoors and outdoors where the season is mild and reasonably warm. Thanks to its quick cycle, outdoors in the Northern Hemisphere it finishes early, around September, before the wetter autumn weather sets in. At a manageable 1.5 m it fits comfortably in a tent, and it is a forgiving plant in the ground or a large pot outside.
Its yield is high, around 450-500 g/m² indoors in an optimized setup and a generous 600-700 g per plant outdoors, so it produces heavily for how fast and easy it is. As a resinous indica, its potency can climb to a high 26% THC, placing it among our high-THC seeds. An Emerald Cup winner, it also sits among our award-winning cannabis seeds and Emerald Cup genetics.
That pedigree comes straight from its parents: Chemdawg lends the sharp, pungent, gassy backbone the line is famous for, while Green Crack brings the bright, zesty citrus and lemon lift and an energetic edge. Keep temperatures around 68-80°F (20-27°C) and humidity sensible through flowering, and run good ventilation, because the aroma is strong and carries.
Feeding Schedule (EC Guide)
Chemdog #4 is a resinous, productive plant that feeds moderately well, but build the nutrients gradually rather than pushing it hard early. Start light while it is young, build through the vegetative stage, shift toward phosphorus and potassium once it flips into flower, then flush at the end so the zesty citrus and lemon notes come through clean. The ranges below are a starting guide; adjust to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.5-0.7 | Very light feed while roots establish |
| Vegetative | 1.2-1.6 | Raise nitrogen as the plant builds structure |
| Early flower | 1.4-1.7 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.6-1.9 | Peak bloom feed while the buds swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
Once you flip it to 12/12, Chemdog #4 finishes fast, in just 7 to 9 weeks, which is quick for such a resinous, high-THC strain and a real advantage for newer growers and short-season outdoor grows. It builds dense, sticky, resin-coated buds on a medium frame, developing a sharp, zesty citrus and lemon aroma with a pungent, gassy undertone as it ripens.
Yields are high at around 450-500 g/m² indoors and a generous 600-700 g per plant outdoors. Keep the colas supported and the canopy open so light reaches the lower buds, feed it steadily through flower, and harvest when most of the trichomes have turned cloudy with a few amber for the fullest zesty citrus-lemon flavor and the most rounded, potent effect.
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 preserves the volatile citrus and lemon terpenes that make Chemdog #4 so aromatic, and a gentle dry protects both that brightness and the sharp, pungent character underneath.
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 is what locks in the zesty citrus and lemon notes and smooths the smoke, turning a freshly dried harvest into the bright, pungent, award-winning result Chemdog #4 is known for.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Chemdog #4 is a very resinous, sticky plant, so its trim is excellent for dry sift, bubble hash or rosin. That heavy resin and sharp, citrus-lemon aroma make the trim genuinely valuable, turning offcuts into a bright, potent concentrate run rather than waste, a real bonus with such a high-THC strain.
Flavor and Terpenes
Chemdog #4 leads with a bright, zesty citrus and lemon flavor, lifted over the sharp, pungent, gassy character its Chemdawg side is famous for. It is a loud, full-bodied smoke, and a good cure keeps that citrus-and-lemon brightness forward in the jar and on the inhale while the pungent backbone gives it real depth.
Its terpene profile shapes that flavor. Alpha-pinene brings a crisp, fresh lift that carries the zesty citrus and lemon, while caryophyllene adds a peppery, spicy bite behind it. Myrcene forms an earthy base, with humulene and linalool rounding out a sharp, bright, aromatic profile. The vivid citrus character comes largely from its Green Crack parent.
Effects and Best Use
With its high 18-26% THC and 60/40 indica-leaning make-up, Chemdog #4 delivers a bright, well-rounded experience. It is reported as happy, talkative and relaxed, pairing an uplifting, sociable head with a comfortable body, which makes it a versatile strain for daytime or social use. At the top of its range the potency is genuinely high, so a measured dose goes a long way for newer smokers.
That happy, talkative, relaxed profile makes it a rewarding strain for hanging out with friends or an easy afternoon, alongside its zesty citrus-lemon flavor. The combination of an award-winning pedigree, strong potency and a bright, pungent taste is exactly why Chemdog #4 stands out among feminized strains.
Common Problems and Pro Tips
Chemdog #4 is forgiving and beginner-friendly, but its powerful aroma and dense buds are the two things to plan for. Those sticky, resinous colas can trap moisture, so keep the air moving and ease the humidity down as the flowers fill out to avoid trouble in the heart of the bud. And because the smell is loud, run good carbon filtration if discretion matters, as it carries well in flower.
At a manageable 1.5 m it is easy to handle, and gentle, low-stress training during veg opens the canopy so light reaches every bud site across its fast bloom. Do your topping and training early, while the plant is still growing, and support the heavier colas as they swell, because the resin-packed flowers can get weighty toward the end.
As a pro tip, protect what makes Chemdog #4 special, its bright citrus and sharp pungency. Those terpenes are volatile, so avoid excessive heat late in flower, dry it slowly and cool, and give it a full three to four week cure with a proper plain-water flush beforehand. Save the sticky trim for concentrates, and take advantage of its early outdoor finish to beat the autumn damp.
FAQ
Is Chemdog #4 a feminized strain?
Yes. Chemdog #4 is a photoperiod feminized strain, so every seed grows into a female, flower-bearing plant and you never have to sex or remove males. You grow it under long days through the vegetative stage, then switch the lights to 12/12 to trigger flowering, which gives you full control over the plant’s size and when it finishes.
How long does Chemdog #4 take to flower?
Chemdog #4 finishes fast, in just 7 to 9 weeks once you switch it to a 12/12 light cycle, which is quick for such a resinous, high-THC strain. Outdoors in the Northern Hemisphere it is ready early, around September, so it comes down before the wetter autumn weather, which makes it a reliable outdoor choice.
How much THC does Chemdog #4 have?
Chemdog #4 is a potent strain, testing across a wide range from about 18% up to a high 26% THC depending on the phenotype and how it is grown. Combined with its 60/40 indica-leaning genetics, the result is a happy, talkative, relaxed effect. At the top of its range it is genuinely strong, so dose it carefully if you are newer to potent strains.
What does Chemdog #4 taste like?
It has a bright, zesty citrus and lemon flavor over a sharp, pungent, gassy backbone from its Chemdawg side. Alpha-pinene brings a fresh lift that carries the citrus, caryophyllene a peppery bite and myrcene an earthy base. A proper three to four week cure keeps that citrus-and-lemon brightness forward on the inhale.
Has Chemdog #4 won any awards?
Yes. Chemdog #4 is an Emerald Cup winner, a strong marker of its quality, flavor and potency. That award-winning pedigree comes from its Chemdawg and Green Crack parents, and it is reflected in the sticky, resinous, high-THC buds and the bright, pungent citrus aroma the strain is known for.
How much does Chemdog #4 yield?
Chemdog #4 is a strong producer, giving around 450-500 g/m² indoors in an optimized setup and a generous 600-700 g per plant outdoors. Its fast cycle makes that harvest even more rewarding. Give it good light penetration, an open canopy and support for the heavier colas to get the most from its dense, resinous buds.
