How to Grow 9 Pound Hammer
9 Pound Hammer, also known as 9lb Hammer, is a strongly indica-dominant feminized strain prized for its sweet berry-grape flavor and heavy, hard-hitting high. It carries a medium 18–23% THC, a berry, grape, citrus, fruity and sweet taste, and a euphoric, powerful, relaxed effect on a compact, resinous plant with elite American heritage.
Bred from Gooberry crossed with Hells OG and Jack the Ripper, 9lb Hammer is an 80% indica, 20% sativa feminized strain. Gooberry brings the sweet berry and grape fruitiness, Hells OG adds deep, resinous OG Kush potency, and Jack the Ripper (with Cinderella 99 behind it) lends complexity, finishing in dense, frosty buds with a rich, fruity-earthy aroma.
Recommended Strains
9 Pound Hammer
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THC | 18% - 23% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 80% Indica / 20% Sativa |
Diesel
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THC | 12% - 21% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 30% Indica / 70% Sativa |
Because it is compact, resilient and genuinely potent, 9 Pound Hammer is a rewarding grow for any level. You can see the full genetics and buy 9 Pound Hammer feminized seeds on the strain page, and browse more of our indica seeds alongside it.
Strain Profile at a Glance
| THC | 18–23% (medium) |
|---|---|
| Lineage | Gooberry x Hells OG x Jack the Ripper |
| Type | Feminized |
| Genetics | 80% Indica / 20% Sativa |
| Climate | Tropical / warm |
| Flowering time | 8–10 weeks |
| Harvest | October |
| Height | 3.94 ft / 1.2 m |
| Yield indoor | 1.47–1.8 oz/ft² (450–550 g/m²) |
| Yield outdoor | 15.87–19.4 oz/plant (450–550 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Berry, Grape, Citrus, Fruity, Sweet |
| Effects | Euphoric, Powerful, Relaxed |
Promos & Deals
Climate and Where to Grow It
9 Pound Hammer does best in a warm, tropical 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, staying compact at around 1.2 m, which makes it an excellent fit for small tents and discreet spaces.
Outdoors it finishes around October and rewards a good spot with 450–550 g per plant, while indoors it produces a strong 450–550 g/m². Those are generous numbers for such a short plant, but they depend on light, pot size and canopy health, so give it good conditions 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. Its dense, resin-heavy indica buds hold moisture, so keep humidity in check as flowering fills in, and because it packs a big yield onto a small frame, support the branches as the sticky 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 9 Pound Hammer is so 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 this already-compact plant even more manageable.
Feeding Schedule (EC Guide)
This is a resinous, productive 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 sweet berry-grape flavor comes 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 short and bushy, packing on dense, chunky, resin-coated buds that gain real weight through the second half of flowering, which is where its big yield on a small frame comes from.
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 berry 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 berry, grape and citrus notes forward and smooths the smoke, which is exactly what this fruity, resin-rich OG Kush-lineage strain deserves.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. 9 Pound Hammer 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
9 Pound Hammer has a moreish, fruit-forward profile: a sweet berry and grape flavor with a bright citrus lift and an earthy undertone. It is a rich, juicy taste rather than a sharp or sour one, carried straight from its Gooberry and OG-heavy heritage into the cured flower, and it is a big part of the strain’s appeal.
Its terpene profile is led by myrcene for the sweet, fruity-earthy base, limonene for the citrus lift, caryophyllene for a soft peppery backbone, linalool for a gentle floral note and pinene for a fresh top. The sweet berry and grape character comes through from the Gooberry side layered over that fruity, citrus-and-pepper terpene base.
Effects and Best Use
With its strongly indica-dominant genetics, 9 Pound Hammer is reported as euphoric, powerful and relaxed, a heavy, body-focused high that comes on fast and settles into deep physical relaxation. A bright, mood-lifting euphoria runs alongside it, so it stays pleasant and happy, but this is a potent, hard-hitting strain best kept for the evening.
At a medium 18–23% THC it is potent but still approachable, which suits both newer users who go slow and experienced users who want a genuinely heavy indica. That character, the sweet berry-grape flavor, the elite American heritage and the compact, generous plant are exactly why growers reach for 9lb Hammer.
Common Problems and Pro Tips
The main thing to plan for with 9 Pound Hammer is its heavy yield on a small, 1.2 m frame. Those dense, chunky buds put real weight on a short plant, so support or stake the branches as the colas fatten, and keep the canopy open with light training so the lower buds get enough light to fill out rather than staying airy.
Humidity is the other thing to watch. Its dense, resin-heavy buds trap moisture, so bud rot is the most common problem in the final weeks of flower, especially in the warm, humid conditions it otherwise enjoys. 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 colas.
As a pro tip, protect the sweet berry-grape flavor that makes this strain special: keep the feed moderate rather than heavy, since overfeeding can mute the fruity terpenes and the limonene, 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, fruitiest smoke.
FAQ
Is 9 Pound Hammer indica or sativa?
9 Pound Hammer, or 9lb Hammer, is strongly indica-dominant, at roughly 80% indica and 20% sativa, from its Gooberry, Hells OG and Jack the Ripper parents. That shows in a heavy, body-focused relaxation best kept for the evening, while the small sativa share and a euphoric lift keep the experience happy rather than purely flattening.
What does 9 Pound Hammer taste like?
It has a sweet, fruit-forward flavor: berry and grape up front with a bright citrus lift and an earthy undertone. Myrcene drives the fruity-earthy base, limonene adds the citrus, and caryophyllene a soft peppery note, while the sweet berry and grape character comes through from its Gooberry heritage layered over that base.
What is 9 Pound Hammer’s THC level?
9 Pound Hammer carries a medium THC of 18–23%, potent but still approachable rather than overpowering. That level drives a euphoric, powerful, relaxed effect that hits hard on the body, so newer users should start with a small amount and build up, while experienced users will enjoy its genuinely heavy, fruity indica character.
How long does 9 Pound Hammer 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, packing dense, resin-coated buds onto its compact frame through the second half of flowering as they gain weight.
How much does 9 Pound Hammer yield?
It is a strong producer for its size, giving around 450–550 g/m² indoors and 450–550 g per plant outdoors in a warm spot. Those numbers depend on light, pot size and canopy health, so give it good conditions, support the branches, and feed it steadily through flower to reach the top of the range.
How tall does 9 Pound Hammer get?
It stays compact, around 1.2 m, which makes it a great choice for small tents, discreet grows and limited spaces. Despite that short stature it produces heavy, dense buds, so it packs a big yield into a small footprint, as long as you support the branches and keep humidity in check late in flower.
