How to Grow Rainbow Kush
Rainbow Kush, also known as Rainbow Bud, is a colourful, balanced feminized hybrid that crosses Blueberry with Dancehall. The result is a 50/50 plant with a medium 17-22% THC, a fruity, spicy and sweet flavor, and a euphoric, focused and tingly effect. It is productive, straightforward and beginner-friendly, and it is known as much for its vivid, rainbow-like colours as for its balanced character.
This is a feminized, 50/50 photoperiod hybrid of moderate height, around 1.5 m, that flowers in 8 to 10 weeks once you switch it to bloom. Every seed grows into a flowering female, so there is no need to identify the sex or remove males, which keeps the grow simple and the whole crop productive. Its Blueberry and Dancehall roots give it a balanced structure, a fruity profile and often striking blue and purple hues.
Recommended Strains
Rainbow Kush
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THC | 17% - 22% (Medium) |
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Type | Feminized |
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Yield | Medium |
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Phenotype | 50% Indica / 50% Sativa |
Rainbow Kush Auto
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THC | 15% - 18% (Medium) |
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Type | Autoflowering |
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Yield | Medium |
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Phenotype | 55% Indica / 45% Sativa |
Colourful, flavourful and dependable, Rainbow Kush is a rewarding way to grow a balanced, mid-THC hybrid with real visual appeal. You can see the full genetics and buy Rainbow Kush seeds on the strain page, and browse the rest of our feminized seeds alongside it.
Strain Profile at a Glance
| THC | Medium (17-22%) |
|---|---|
| Lineage | Blueberry x Dancehall |
| Type | Feminized (photoperiod) |
| Genetics | 50% Indica / 50% Sativa |
| Climate | Tropical, warm |
| Flowering time | 8-10 weeks |
| Harvest (outdoor) | October |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.31-1.47 oz/ft² (400-450 g/m²) |
| Yield outdoor | 15.87-19.4 oz/plant (450-550 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Fruity, Spicy, Sweet |
| Effects | Euphoric, Focused, Tingly |
Promos & Deals
Growing a Feminized Photoperiod Strain
Rainbow Kush is a photoperiod strain, so it flowers in response to the light cycle rather than on age. You grow it under a long day of around 18 hours of light while it builds size and structure, then switch to a 12/12 light schedule to trigger flowering, which runs 8 to 10 weeks from the flip to harvest. Because the seeds are feminized, every plant comes up female and goes on to flower, so you never have to check the sex or cull males.
That control over the light cycle is an advantage. You decide how long to veg the plant and therefore how big it gets before you flip it, which lets you match it to your space. As a balanced 50/50 hybrid it grows with a moderate, even structure rather than tall and lanky or short and squat, so give it an open canopy and a little low-stress training to spread the light evenly across the plant.
Climate and Where to Grow It
Rainbow Kush does best in a warm, tropical or Mediterranean-style climate with plenty of sun, steady warmth and good airflow. Its balanced Blueberry and Dancehall genetics make it adaptable and forgiving, and outdoors it suits a long, warm season that lets its colourful buds ripen fully and finish by around October.
It performs well indoors and out. Indoors it returns a solid 400-450 g/m² in a well-managed tent, while outdoors a healthy plant with room and sun gives a good 450-550 g. As a balanced hybrid of about 1.5 m it stays manageable in height, so the main job is keeping the canopy open so light and air reach the lower buds.
Keep humidity under control through flowering to protect the buds: around 55-60% in early bloom, nearer 40-45% as the buds fill out, and lower toward harvest. Steady airflow and sensible humidity are what keep the finish clean, and cooler nights late in flower can deepen the blue, purple and rainbow-like colours it inherits from Blueberry. Aim for daytime temperatures around 70-82°F (21-28°C).
Feeding Schedule (EC Guide)
Rainbow Kush is a steady, productive plant, and it pays to build nutrients up gradually and let the plant set the pace. Feed it steadily through veg and bloom, then taper off for the final flush so the fruity, spicy and sweet flavor comes through clean and the smoke finishes smooth. The ranges below are a starting guide; adjust to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4-0.6 | Very light feed while roots establish |
| Vegetative growth | 0.8-1.2 | Raise nitrogen as the plant builds size |
| Early flower | 1.2-1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4-1.6 | 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 switch Rainbow Kush to a 12/12 light schedule it flowers in 8 to 10 weeks. As a balanced 50/50 hybrid it fills out with an even structure and forms solid, resinous buds up a moderate frame, often showing off vivid blue and purple tones as it ripens. Grown outdoors in a warm climate it is typically ready to harvest around October.
Yields are a solid medium: around 400-450 g/m² indoors and a good 450-550 g per plant outdoors with good sun and space. Give it a little training so the lower buds get light, feed it well through bloom, and harvest when most of the trichomes have turned cloudy for the fullest fruity flavor and a balanced, euphoric 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 protects both the aroma and the colour, which keeps the fruity character and the vivid hues of this strain intact rather than letting the buds dry out too quickly.
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 brings the fruity, spicy and sweet notes forward and smooths the smoke, which matters on a Blueberry-derived strain where that ripe, fruity character is a big part of the appeal.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Rainbow Kush is a resinous plant, so its trim works well for dry sift, bubble hash or rosin. That trim makes for a flavourful, fruity-and-sweet concentrate run from material most growers would otherwise throw away, and it is a good way to use the whole plant.
Flavor and Terpenes
Rainbow Kush has a bright, fruity profile: a ripe berry fruitiness from its Blueberry side, a spicy edge, and a sweet finish. It is a fresh, fruity flavor rather than a heavy or gassy one, and a good cure really brings that fruity-spicy-and-sweet character forward in the jar and on the inhale, matching the colourful look of the buds.
Its terpene profile shapes that character. Myrcene lays down a ripe, fruity-earthy base that carries the Blueberry sweetness, while caryophyllene adds the warm, peppery spice that gives the flavor its spicy edge. Alpha-pinene brings a fresh, piney lift and humulene an earthy, woody depth underneath. Together they frame the fruity, spicy and sweet character Rainbow Kush is known for.
Effects and Best Use
With its medium 17-22% THC and balanced 50/50 make-up, Rainbow Kush delivers an even, well-rounded experience. It is reported as euphoric, focused and tingly: an uplifting, cheerful lift with a clear, focused edge and a pleasant physical tingle, in keeping with its hybrid balance. The medium THC keeps it approachable, so it is a comfortable choice for a manageable, functional effect.
That balanced, focused profile makes it a versatile strain, suited to daytime and social use as much as a relaxed evening. The combination of a straightforward, beginner-friendly grow, a solid yield, vivid colours and a fruity flavor, all at an approachable medium-THC level, is exactly why it stands out.
Common Problems and Pro Tips
The grow itself behaves like any balanced hybrid, so the usual priorities apply: keep the air moving around and through the canopy, hold humidity down as the buds fill out, and don’t let the plant sit in still, damp air. Defoliating a few of the largest fan leaves in mid-bloom helps light and air reach the lower buds on its even, moderate frame.
Because it is a balanced 50/50 hybrid, train it early. A little low-stress training or a light topping in veg opens the canopy and turns one dominant cola into several even ones, which keeps the whole plant productive and lifts the medium yield. Give it a sturdy structure and good light so the buds develop evenly.
As a pro tip, play to its best feature, the colour: letting nights run a little cooler late in flower helps bring out the blue, purple and rainbow-like tones it gets from Blueberry. Protect the fruity flavor with a clean plain-water flush and a three to four week cure, and lean on its beginner-friendly nature by keeping the feed steady and the canopy open.
FAQ
Is Rainbow Kush a feminized strain?
Yes. Rainbow Kush is a feminized photoperiod strain, so every seed grows into a flowering female and you never have to identify the sex or remove males. You grow it under long days, then switch to a 12/12 light schedule to start flowering. That makes the whole crop productive and keeps the grow simple, which helps make it beginner-friendly.
How much THC does Rainbow Kush have?
Rainbow Kush is a medium-THC strain, testing at around 17-22%. That approachable level, combined with its balanced 50/50 genetics, gives a euphoric, focused and tingly experience that stays even and functional. It is a comfortable choice if you prefer a manageable potency that works for daytime and social use as well as a relaxed evening.
How long does Rainbow Kush take to flower?
Rainbow Kush flowers in about 8 to 10 weeks once you switch it to a 12/12 light schedule. As a photoperiod strain you also control how long it vegetates beforehand, which sets its final size. Grown outdoors in a warm, tropical climate it is usually ready to harvest around October, once the trichomes have turned mostly cloudy.
What does Rainbow Kush taste like?
It has a bright, fruity profile: ripe berry from its Blueberry side, a spicy edge, and a sweet finish. Myrcene drives the fruity-earthy base, caryophyllene the peppery spice, alpha-pinene a fresh lift and humulene a woody depth. A proper cure brings the fruity-spicy-and-sweet character forward and smooths out the smoke.
Why is it called Rainbow Kush?
The name comes from its vivid colours. Thanks to its Blueberry parent, Rainbow Kush, also known as Rainbow Bud, often develops striking blue, purple and rainbow-like tones in its buds and leaves, especially when nights run cooler late in flower. A slow dry and cure help preserve those colours in the finished flower.
Is Rainbow Kush good for beginners?
Yes. It is a feminized, balanced and forgiving plant, so the cultivation is beginner-friendly: every seed is female and its even hybrid structure handles mistakes well. The main things to watch are humidity around the buds, which steady airflow keeps in check, and keeping the canopy open so the lower buds get light.
