Rainbow Runtz feminized cannabis plant in flower

Feminized seeds

ZkittlezxDo-Si-Dos

THC: 22-26%
Bloom: 8-9 wks
Yield/sq ft: 1.5-1.8 oz
Level: Moderate

Rainbow Runtz Feminized Seeds

From $65.00

Fruit-candy sweetness, grape and tropical notes, and buds that can ripen in a mix of green and violet. A balanced Zkittlez x Do-Si-Dos hybrid that flowers in 8-9 weeks.

THC22-26%
Bloom8-9 weeks
Height3-5 ft indoors
LevelModerate

Pack Size

Clear

In stock. Order before 1pm CT and it ships today.

Best-quality seedsGermination guaranteed
Fast shippingFree over $200, tracked
US & Canada warehousesUS orders ship from the US
Discreet & securePlain box, 21+ checkout

We accept

Visa
Mastercard
Bitcoin
Cash

SKU: BMS-RR-FEM Categories: Feminized Seeds, High THC Seeds, High Yield Seeds, Hybrid Seeds, Outdoor Seeds

Quick answerRainbow Runtz is a balanced hybrid that crosses Zkittlez with Do-Si-Dos. It is prized for a sweet fruit-candy and grape flavor, multicolored buds, reported THC of 22-26%, and an indoor flowering time of 8-9 weeks, with outdoor harvests in late September to early October.

Rainbow Runtz at a glance

THC22-26%Supplier reported. Potent, with a smooth, even curve.

Flowering8-9 wksAfter the move to 12/12

Indoor yield1.5-1.8 ozPer sq ft, trained plants

Height3-5 ftIndoors. 6-8 ft outdoors

Outdoor harvestLate SepThrough early October

Bag appealGreen, violet and orange in the same budCool late-flower nights bring out the deepest purples

What is the Rainbow Runtz strain?

Rainbow Runtz comes from the candy branch of modern American cannabis. It pairs Zkittlez, the fruit-candy strain that set the tone for a whole wave of sweet hybrids, with Do-Si-Dos, a potent cookie-family descendant known for doughy depth and dark coloring.

The two parents meet in the middle. Zkittlez gives the bright, mixed-fruit sweetness and an upbeat mood. Do-Si-Dos adds weight, density and the purple hues that show up in late flower. Plants grow to a medium height with strong branching and tight, spade-shaped buds. As they ripen, many phenotypes show greens and violets side by side with rusty orange pistils under a heavy coat of frost, which is where the rainbow name comes from.

Through Zkittlez it shares candy roots with the original Runtz, but the Do-Si-Dos side gives it a richer, heavier finish. These feminized seeds are bred to produce female plants, and the line runs fairly uniform, which makes it easier to plan a tidy canopy.

ZkittlezDo-Si-Dos

Zkittlez x Do-Si-DosFeminized line

Rainbow Runtz

How it feels

Consumers commonly report a sunny, happy start that keeps conversation flowing, then a gradual, smooth body ease. Most sessions last two to three hours and end gently.

First 10 minutesSunny lift
A cheerful, euphoric mood boost that feels light and social.
30 to 60 minutesBalanced middle
Head and body even out, with a relaxed warmth spreading in.
2 to 3 hoursSoft landing
A calm, settled finish that suits an easy evening.

Commonly reportedUpliftedHappyEuphoricRelaxed

Reported THC reaches 26%, so start with a small amount if you are new to strong hybrids. Commonly reported side effects include dry mouth and dry eyes, and some people feel anxious or dizzy at high doses. General reports, not medical guidance.

Aroma, flavor and terpenes

A burst of mixed fruit candy on the nose, with grape and tropical fruit underneath and a faint doughy, earthy note from the Do-Si-Dos side. The exhale stays sweet and smooth. Expect a strong smell in late flower.

Flavor notesCandyGrapeTropicalBerry

CaryophylleneSpice, black pepper

Gives the sweetness a warm, grounded edge.

LimoneneCitrus, sweet fruit

Lifts the bright, candy-like top notes.

LinaloolFloral, lavender

Adds a soft floral layer common in Do-Si-Dos crosses.

Keep the dry slow and cool, around 60°F and 60% RH, and cure for three weeks or more. Candy-type terpenes fade fast in a warm, quick dry.

How to grow Rainbow Runtz

Rated moderate. It is sturdy and fairly uniform, but dense buds need steady airflow, and the best color comes from a controlled night temperature drop at the end.

Indoors

Veg climate: 75-82°F, 55-65% RH
Flower climate: 68-80°F, 40-50% RH
Color push: Nights 10-15°F cooler in the last 2 weeks
Light: 750-1,000 PPFD in flower (LED)
Training: Top once, LST, light lollipop at week 3
Feeding: Moderate; cal-mag under LED

Outdoors

Plant out: After last frost, nights above 50°F
Size: 6-8 ft with full sun
Harvest: Late September to early October
Best fit: Sunny, dry autumns (USDA 6-10)
Watch for: Mold in dense tops during wet spells
Protect: Prune lower growth; cover in rain

Read the full indoor grow guide

Indoors, Rainbow Runtz typically reaches 3 to 5 feet and keeps a fairly even shape, so it fits a 3×3 or 4×4 ft tent without a fight. Its moderate rating comes mostly from the dense, spade-shaped buds, which need clean air and controlled humidity in the final weeks.

Environment

Vegetative: 75-82°F days with 55-65% relative humidity.
Flower: 68-80°F at 40-50% RH, sliding to the low 40s for the last two weeks to keep tight buds clear of powdery mildew and rot.
Color: in the final two weeks, let lights-off temperatures fall 10-15°F below daytime. This deepens the purples without stalling growth.

Light and training

Run roughly 500-750 PPFD in veg and 750-1,000 PPFD in flower under LED. Top once, then use low-stress training to open the plant into an even table of tops. Around week three of flower, lollipop the lower third so energy goes to the main colas and air moves freely underneath.

Feeding

Moderate feeding works best. Too much nitrogen late in flower can mute both color and flavor, so switch to bloom nutrients early and add cal-mag under LED lighting.

Harvest timing

Expect 8 to 9 weeks of bloom. Look at the trichomes rather than the calendar: mostly cloudy keeps the effect upbeat, while 10-20% amber gives a heavier, more relaxing finish.

Seed to jar in about 21 weeks

A standard indoor run. Adjust veg to your space; flowering time is fixed by the genetics.

Germinate1 wkSeedling2 wkVegetate4 wkFlower9 wkDry and cure5 wk

Week 1Week 21

Germinate weeks 1-1
Moist paper towel, 75-80°F
Seedling weeks 2-3
Low light, 65-70% RH
Vegetate weeks 4-7
Top once, begin LST
Flower weeks 8-16
8-9 weeks, cool nights late
Dry and cure weeks 17-21
Slow dry, 3+ week cure

Growing Rainbow Runtz outdoors in the US

Outdoors, Rainbow Runtz grows tall, often 6 to 8 feet, and can produce roughly 18 to 21 ounces per plant in full sun. It finishes from late September into early October, which is early enough to beat the first frost in much of the country. Plant out once your last spring frost has passed and nights stay above about 50°F.

Cool fall nights are a bonus here, since they bring out the purple tones, but cold rain is not. Dense tops hold water after a storm, so prune the lower branches, keep plants spaced for airflow, and shake off heavy dew in the morning. If a long wet stretch is forecast near the finish, harvest a few days early. Our harvest, dry and cure guide walks through the steps.

Know your state’s rules first. Some states allow adults to grow at home and some do not, and plant limits vary. See marijuana laws by state.

Will it finish where you live?

ExcellentInland California and the Southwest

Dry, sunny autumns and cooler nights bring full ripeness and strong color.

GoodColorado Front Range and Utah valleys

A late September finish usually beats the first hard frost, and dry air protects the buds.

GoodMidwest

An early October harvest fits most seasons; watch for wet spells in the last weeks.

FairNortheast

Finishes in time, but humid late summers raise mold risk in dense tops.

FairSoutheast and Gulf Coast

Plenty of season, yet warm, humid nights limit color and raise rot pressure.

Check your state's home-grow rules before you plant. Laws by state

Who Rainbow Runtz is for

Flavor loversAnyone who wants sweet, fruit-candy terps with a grape and tropical twist.
Bag-appeal growersGrowers who like multicolored, frosty buds that photograph well in the jar.
Balanced-high fansConsumers who want a happy, social start and a calm finish from one strain.
Shorter-season outdoor growersA late September to early October finish suits many northern and mountain gardens.

Keep exploring

Hybrid seedsBalanced genetics for every grow High THC seedsOur most potent strains How to grow indoorsTent setup, lighting and climate basics Strain finderMatch a strain to your space and taste What is lollipopping?Pruning that focuses energy on top buds

Rainbow Runtz strain data sheet

Genetics

Seed type: Feminized
Genetics: Balanced hybrid
Lineage: Zkittlez x Do-Si-Dos

Potency & profile

THC: 22-26% (supplier reported)
CBD: 0.1-1%
Commonly reported effects: Euphoric, Happy, Relaxed, Uplifted
Flavors: Berry, Candy, Grape, Tropical
Dominant terpenes: Caryophyllene, Limonene, Linalool

Growing

Flowering time: 8-9 weeks
Height: 3-5 ft indoors, 6-8 ft outdoors
Difficulty: Moderate
Climate: Warm and semi-dry, 68-80°F, 40-50% RH in flower
Best USDA zones: 6-10 (dry autumn regions)
Outdoor harvest: Late September to early October

Yield

Indoor yield: 1.5-1.8 oz per sq ft
Outdoor yield: 18-21 oz per plant

Ranges are typical for this strain and vary with phenotype, environment and technique.

Rainbow Runtz FAQ

Is Rainbow Runtz indica or sativa?

Rainbow Runtz is a balanced hybrid. The Zkittlez side brings an upbeat, happy mood, while Do-Si-Dos adds body, density and a relaxed finish.

How strong is Rainbow Runtz?

Our supplier reports THC of 22-26%, which places it in high-THC territory. Actual potency depends on phenotype, growing conditions and when you harvest, so use the range as a guide rather than a promise.

How long does Rainbow Runtz take to flower?

Indoors it flowers in about 8 to 9 weeks after switching to 12/12. Outdoors in the US, plants typically finish from late September into early October.

How much does Rainbow Runtz yield?

With a well-trained canopy indoors, expect roughly 1.5 to 1.8 ounces per square foot. Outdoor plants in full sun can produce roughly 18 to 21 ounces each when conditions are good.

Is Rainbow Runtz beginner-friendly?

It is rated moderate. The plants are sturdy and fairly uniform, but dense buds need good airflow and humidity control late in flower, so some prior grow experience helps.

What does Rainbow Runtz smell and taste like?

Sweet mixed fruit candy leads, with grape, tropical fruit and berry notes underneath and a light doughy base. Caryophyllene, limonene and linalool are commonly reported terpenes for the strain.

Where does Rainbow Runtz grow best in the US?

Inland California and the Southwest give it the best results thanks to dry autumns and cool nights. Its late September to early October finish also works in Colorado and much of the Midwest.

How do I bring out the rainbow colors?

Color is partly genetic, but cooler nights help. In the last two weeks of flower, let lights-off temperatures drop 10-15°F below daytime and avoid heavy nitrogen late in bloom.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.