Purple Urkle feminized cannabis plant in flower

Feminized seeds

Mendocino Purps phenotype

THC: 18-22%
Bloom: 8-9 wks
Yield/sq ft: 1.1-1.5 oz
Level: Moderate

Purple Urkle Feminized Seeds

From $65.00

Grape, berry and old-school skunk on a squat, purple-budded indica. A Northern California heirloom that finishes in 8-9 weeks and stays tent-sized.

THC18-22%
Bloom8-9 weeks
Height2-4 ft indoors
LevelModerate

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SKU: BMS-PU-FEM Categories: Feminized Seeds, Indica Seeds, Indoor Seeds, Outdoor Seeds

Quick answerPurple Urkle is a heavily indica-leaning strain, a selected phenotype of the Northern California purple line known as Mendocino Purps. It is prized for deep purple buds, a grape-and-berry nose with a skunky edge, supplier reported THC of 18-22%, and an 8-9 week flowering time indoors.

Purple Urkle at a glance

THC18-22%Supplier reported. Heavy and calming more than racy.

Flowering8-9 wksCounted from the flip to 12/12

Indoor yield1.1-1.5 ozPer sq ft from short, stocky plants

Height2-4 ftIndoors. 4-6 ft in the garden

Outdoor harvestEarly OctAhead of most fall storms

HeritageA cornerstone of the purple familyIts color genes sit behind Granddaddy Purple and many modern grape strains

What is the Purple Urkle strain?

Purple Urkle traces back to the hills of Mendocino and Humboldt counties in the 1980s, when Northern California growers were selecting the most colorful plants out of a local purple population later called Mendocino Purps. Nobody wrote down the exact pairings, which is normal for strains of that era. What survived was a standout cut: short, wide-leafed, reliably purple and heavy on grape.

That cut became one of the most important building blocks in modern cannabis. Crossed with Big Bud, it produced Granddaddy Purple, and its pigment genes run through a long list of grape and purple strains that followed. The name is a playful nod to a famously nerdy 1990s sitcom character, which helped it stick on West Coast menus.

The purple is genetic, not a trick of cold weather. As buds mature, calyxes and sugar leaves shift from green to plum and nearly black, framed by orange pistils. These feminized seeds are bred to produce female plants, so each one you sprout is headed for flower.

Mendocino Purps

Mendocino PurpsSelected phenotype

Purple Urkle

How it feels

Consumers commonly describe a soft, contented mood that settles quickly into deep physical calm. There is little mental push, which is why most people keep it for evenings. Effects tend to last two to three hours.

First 15 minutesWarm, easy mood
A mellow, smiling calm that quiets a busy mind.
30 to 60 minutesHeavy body
Limbs feel weighted and the couch starts to look very good.
2 to 3 hoursLights out
Many people report a strong pull toward sleep by the end.

Commonly reportedRelaxedSleepyCalmHappy

This is a strongly sedating profile, so plan on staying in and start with a small amount. Commonly reported downsides include dry mouth, dry eyes and grogginess the next morning at high doses. General reports, not medical guidance.

Aroma, flavor and terpenes

Ripe grape and mixed berry hit first, followed by an old-school skunk funk and damp, earthy wood. Smoke is smooth and jammy with a faint pine snap on the exhale.

Flavor notesGrapeSkunkyBerryEarthy

MyrceneMusk, ripe fruit

Builds the jammy grape base and heavy feel.

CaryophyllenePepper, wood

Adds the earthy, skunky depth.

PinenePine needles, fresh resin

Brings a crisp lift to the finish.

Grape aromas round out with time in the jar. Give Purple Urkle at least three to four weeks of cure at about 62% humidity before judging the flavor.

How to grow Purple Urkle

Rated moderate, and one of the more forgiving purple strains. Phenotypes are fairly uniform; the main jobs are airflow around dense buds and not overfeeding a small indica.

Indoors

Veg climate: 72-78°F, 55-65% RH
Flower climate: 62-78°F, 40-50% RH
Late flower: Nights 8-12°F cooler for color
Light: 700-900 PPFD in flower (LED)
Training: Top once, then LST or a SCROG
Feeding: Light to moderate; easy on nitrogen

Outdoors

Plant out: After last frost, nights above 50°F
Size: 4-6 ft, bushy and wide
Harvest: Early October
Best fit: Mild days and cool nights (USDA 6-10)
Watch for: Mold in tight buds after fall rain
Protect: Prune lower growth; open the center

Read the full indoor grow guide

Purple Urkle is a short, sturdy plant with broad leaves and thick stems, so it fits neatly in a 2×4 or 3×3 ft tent. It is rated moderate mainly because its tight, resinous buds need a clean environment late in flower, not because the plant is fussy.

Environment

Vegetative: 72-78°F with 55-65% relative humidity.
Flower: 62-78°F and 40-50% RH. It handles the cool end of that range better than most strains.
Airflow: keep a fan moving air through the canopy and exhaust through a carbon filter, since the grape funk gets strong.

Training

Indica structure means a dominant main cola and shorter side branches. Top once around the fourth or fifth node, then spread the plant with low-stress training or a SCROG net to fill the space. A round of lollipopping before the flip removes weak lower sites that would only make larf.

Feeding

Small indicas burn easily. Feed at moderate strength, taper nitrogen once flowers set, and add cal-mag if you run LED. Overfeeding late can mute both the color and the grape aroma.

Color and harvest

The purple shows on its own, but a modest drop in night temperature during the last two weeks often deepens it. Most plants finish 8 to 9 weeks after the switch to 12/12. Check trichomes: for this sleepy strain, many growers wait for 15-25% amber heads.

Seed to jar in about 20 weeks

A typical indoor run with a short veg. Purple Urkle stays compact, so you rarely need more than four weeks of vegetative growth.

Germinate1 wkSeedling2 wkVegetate4 wkFlower9 wkDry and cure4 wk

Week 1Week 20

Germinate weeks 1-1
Paper towel at 75-80°F
Seedling weeks 2-3
Mild light, 65-70% RH
Vegetate weeks 4-7
Top at node 4-5, then LST
Flower weeks 8-16
8-9 weeks on 12/12
Dry and cure weeks 17-20
60°F, 60% RH, long jar cure

Growing Purple Urkle outdoors in the US

Purple Urkle was shaped in the coastal mountains of Northern California, and it still prefers mild days and cool nights. Outdoors, plants grow into wide 4 to 6 foot bushes, can produce roughly 14 to 18 ounces each in full sun, and are usually ready in early October. Set plants out after your last frost once nights stay above about 50°F.

Its early finish is a real advantage. Many photoperiod strains are still ripening when October storms roll in; Purple Urkle is often hanging to dry by then. Chilly autumn nights also pull out the darkest purple, so gardens in the interior West and the northern states can see striking color. The one weak spot is moisture: dense buds hold water after rain or heavy dew, so prune the interior and keep the plant spaced for airflow.

Plan your start date with our outdoor planting guide. Always confirm your state’s rules first, since home growing is legal for adults in some states but not others. See marijuana laws by state.

Will it finish where you live?

ExcellentInland California and the Southwest

Dry falls and cool desert nights give clean, heavily colored buds by early October.

ExcellentColorado Front Range and Utah valleys

The early finish beats most high-country frosts, and cold nights push the purple hard.

GoodMidwest

It ripens before late-October cold; keep an eye on humid stretches in September.

FairNortheast

It finishes in time, but damp autumns put its tight buds at risk of mold.

PoorSoutheast and Gulf Coast

Warm, muggy nights mute the color and invite rot; grow indoors instead.

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

Who Purple Urkle is for

Evening consumersPeople who want a calm, heavy, end-of-day strain with classic grape flavor.
Color chasersGrowers who want reliably purple buds without relying on cold tricks.
Small-space growersA 2-4 ft indoor frame that suits closets and 2×4 ft tents.
Northern outdoor gardensAn early October finish that slips in ahead of fall weather.

Keep exploring

Indica seedsRelaxing, compact, evening-friendly strains Feminized seedsFemale plants from every seed How to harvest, dry and cureKeep the grape aroma intact What is a phenotype?Why one plant can become a named strain Yield calculatorEstimate your harvest before you plant

Purple Urkle strain data sheet

Genetics

Seed type: Feminized
Genetics: Indica-leaning (about 90% indica)
Lineage: Mendocino Purps phenotype

Potency & profile

THC: 18-22% (supplier reported)
CBD: 0.1-1%
Commonly reported effects: Calm, Happy, Relaxed, Sleepy
Flavors: Berry, Earthy, Grape, Skunky
Dominant terpenes: Caryophyllene, Myrcene, Pinene

Growing

Flowering time: 8-9 weeks
Height: 2-4 ft indoors, 4-6 ft outdoors
Difficulty: Moderate
Climate: Mild, 62-78°F, 40-50% RH in flower, cool nights welcome
Best USDA zones: 6-10 (cool-night regions color best)
Outdoor harvest: Early October

Yield

Indoor yield: 1.1-1.5 oz per sq ft
Outdoor yield: 14-18 oz per plant

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

Purple Urkle FAQ

Is Purple Urkle indica or sativa?

Purple Urkle is heavily indica-leaning, usually described as about 90% indica. It grows short and broad-leafed, and its effects are mostly physical and calming.

How strong is Purple Urkle?

Our supplier reports THC around 18-22%, with CBD between 0.1% and 1%. That is plenty for most evening use, and actual numbers vary with phenotype, growing conditions and when you harvest.

How long does Purple Urkle take to flower?

Indoors, most plants finish 8 to 9 weeks after switching to a 12/12 light schedule. Outdoors in the US, harvest usually lands in early October.

How much does Purple Urkle yield?

Expect roughly 1.1 to 1.5 ounces per square foot indoors with good light and training. Outdoor plants in full sun can produce around 14 to 18 ounces each.

Is Purple Urkle good for beginners?

It is rated moderate but is one of the easier purple strains to grow. Its uniform, compact plants are forgiving; just keep humidity in check around the dense buds late in flower.

What does Purple Urkle smell and taste like?

Grape and berry dominate, with a skunky, earthy undertone and a hint of pine. Myrcene, caryophyllene and pinene are the terpenes most often reported for it.

Where does Purple Urkle grow best in the US?

Dry regions with cool nights, such as inland California, the Southwest and Colorado, give the best color and the cleanest buds. Humid Southeast summers are a poor match outdoors, so growers there do better indoors.

Does Purple Urkle need cold temperatures to turn purple?

No. Its color comes from its genetics, so buds turn purple even in a warm room. A modest drop in night temperature during the final two weeks can deepen the shade, but hard chilling is not needed.

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