Purple Dream Auto is a Kannabia autoflower bred for color, calm, and simplicity. From Purple Haze Auto x Purple Kush Auto, it is a compact, indica-leaning plant that finishes fast, turns a striking purple, and forgives beginner mistakes. At 16-18% THC it delivers a gentle, relaxing effect rather than an overwhelming high, which makes it a friendly first grow or a discreet balcony plant.
This is an autoflower, so it flowers on age rather than a change in the light cycle, which keeps the grow simple. The figures below are Kannabia breeder values; check your own pack for the exact numbers.
Recommended Strains
Purple Dream Auto
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THC | 16% - 18% (Medium) |
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Lineage | Purple Haze Auto x Purple Kush Auto |
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Type | Autoflowering |
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Height | 3.61 ft | 1.1 m |
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Yield | Low |
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Yield Indoor | 1.15 oz/ft² | 350 g/m² |
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Yield Outdoor | 7.05 oz/plant | 200 g/plant |
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Life Cycle | 8 - 9 weeks |
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Phenotype | 60% Indica / 40% Sativa |
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Effects | Balanced |
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Flavors | Spicy, Floral, Earthy |
Purple Kush Seeds
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THC | 22% - 23% (Medium) |
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Lineage | Purple Kush x Black Domina |
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Type | Feminized |
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Height | 5.25 ft | 1.6 m |
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Yield | High |
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Yield Indoor | 1.31 - 1.64 oz/ft² | 400 - 500 g/m² |
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Yield Outdoor | 24.69 - 28.22 oz/plant | 700 - 800 g/plant |
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Flowering Time | 8 - 9 weeks |
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Phenotype | 60% Indica / 40% Sativa |
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Effects | Balanced |
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Flavors | Earthy, Fruity, Sweet |
Purple Dream Auto Grow Info
| Trait | Purple Dream Auto (Kannabia) |
| Genetics | Purple Haze Auto x Purple Kush Auto |
| Seed type | Autoflowering |
| Genetic profile | 60% indica / 40% sativa |
| THC | 16-18% (medium) |
| Full life cycle | 8-9 weeks (about 60-65 days) |
| Height | Around 1.1 m (up to 120 cm outdoors) |
| Indoor yield | About 350-400 g/m² |
| Outdoor yield | Around 200 g per plant |
| Effects | Balanced, relaxing |
| Flavor | Earthy, spicy, floral |
These are Kannabia’s published figures for the Purple Dream Auto line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Purple Dream Auto seed pack.
What Makes Purple Dream Auto Worth Growing
Purple Dream Auto is about looks and ease. It turns a stunning purple as it ripens, finishes in 8-9 weeks, and stays compact and discreet enough for a balcony or a small tent. Its autoflower genetics and resilient structure make it one of the more beginner-friendly strains you can grow.
The effect is gentle and relaxing rather than heavy, with a 16-18% THC level that suits a calm wind-down and restful sleep more than a strong high. The flavor runs earthy, piney, spicy, and floral, a grounded, natural profile that matches the laid-back experience. Yields are modest, so this is a strain you grow for color, calm, and simplicity over sheer weight.
Is Purple Dream Auto Indica or Sativa?
Purple Dream Auto is indica leaning, listed at 60% indica and 40% sativa, with ruderalis in the mix for its autoflower timing.
That balance shows in both the plant and the effect. The plant is compact and resilient, easy to keep in a small space. The effect is balanced and relaxing, with the indica side easing muscles and encouraging sleep while the sativa share keeps it from being fully sedating, so it is a comfortable evening strain.
Flowering Time vs Full Grow Time
Autoflowers confuse a lot of growers on timing, so it is worth being precise.
- Flowering period: about 60-65 days. This is the bloom stage, where the buds form, colour up, and ripen.
- Full grow time (seed to harvest): about 8-9 weeks. For this fast auto the flowering and full cycle run close together, with the plant moving into bloom on its own early.
The takeaway: do not add a separate long veg period on top. Purple Dream Auto is quick, so plan around the full 8-9 week seed-to-harvest window and let the trichomes confirm the finish.
Does Purple Dream Auto Need a 12/12 Light Cycle?
No. Purple Dream Auto flowers on age, not day length, so it never needs a 12/12 photoperiod to bloom.
Indoors you can hold a longer schedule, and Kannabia recommends 18-20 hours of light through the whole grow. Dropping to 12/12 once flowering starts only cuts daily light and costs you yield on an already modest producer. Keep the longer schedule and good light intensity instead.
Purple Dream Auto Grow Timeline, Week by Week
Treat this as a development pattern, not a fixed schedule, since phenotype and environment shift the dates.
- Weeks 1-2: germination and seedling. The taproot and first leaves establish. Keep water light and conditions stable.
- Weeks 3-4: vegetative growth. The plant builds a compact frame and may show preflowers. Start gentle low stress training while stems are soft.
- Weeks 5-6: stretch and bud set. Vertical growth slows and flower sites fill in. Water demand rises and resin builds.
- Weeks 7-8: flower and color. Dense buds develop, and cooler nights now start to bring out the purple.
- Week 8-9 and finish: maturation and harvest. Most plants finish here. Judge ripeness by the trichomes, not the day count.
Choosing Your Setup: Space, Light and Pots
Purple Dream Auto is made for small spaces. At around 1.1 m it fits a compact tent, a terrace, or a balcony, and stays discreet throughout the grow.
Light drives the yield, so give it a good source. A full-spectrum LED at 25-35 watts per square foot on an 18-20 hour schedule keeps the buds dense. Add an inline exhaust fan and a carbon filter, since even a small plant builds a noticeable aroma in flower.
Plant straight into the final 3-5 gallon fabric pot and skip transplanting, which autos dislike. Fabric pots air-prune the roots and keep the root zone healthy across the short cycle.
Germinating and Raising Seedlings
The paper towel method is the easy, reliable start. Soak the seeds for 12-24 hours, then set them between damp paper towels on a covered plate, kept dark and warm at 70-85°F (21-29°C). A taproot usually shows in two to three days.
When the taproot reaches about 1-2 cm, plant it root-down a knuckle deep in a light mix and keep the surface moist until the seedling breaks ground. Hold off on nutrients at this stage. New to germination? Our beginner growing guides walk through it step by step.
The Vegetative Stage and Low Stress Training
Veg is short on an auto, so use these weeks to build a wide, even frame. Keep nitrogen available, hold temperatures in the low to mid 70s°F, and start low stress training while the branches bend easily.
Low stress training is the technique that pays off here. Tying the main branches outward opens the compact canopy and gets light to the lower buds, which adds a little weight on a modest yielder. Skip topping and other high-stress cuts, since an autoflower has no time to recover before the clock flips it into flower.
Feeding and Watering Purple Dream Auto
Keep feeding light. Autos run smaller root systems, so start nutrients at about half the label strength and build up only if the plant asks. Use a nitrogen-forward base through veg, then move to a bloom formula higher in phosphorus and potassium as flowering sets in, watching the leaves for any sign of burn.
Water by root-zone moisture, not a timetable. A young plant needs very little, and soaking the whole medium starves the roots of oxygen. As the plant grows, demand climbs, so increase water gradually by pot weight and how fast the top layer dries.
Getting the Purple Color
The purple is one of this strain’s main draws, but it is coaxed out by temperature. Purple Dream Auto has the genetics to turn deep purple, and the color comes through strongest when nighttime temperatures drop in the last two to three weeks of flower.
Aim for a wider day-to-night gap late in bloom, with cooler nights around 60°F (15°C), while keeping days in the normal range. Do not overcool or stress the plant chasing color, since ripeness and health matter more. Outdoor plants often purple up naturally as autumn nights cool.
Flowering and Knowing When to Harvest
Flowering begins on its own partway through the grow, with a short stretch and the first pistils, then dense, resinous, colouring buds develop. The earthy, spicy, floral aroma builds through the middle weeks, so keep air moving and run a carbon filter indoors.
As the finish approaches, let the plant decide. Check trichomes under a loupe and harvest when most are cloudy with a few amber for a heavier, more sedative effect. After the cut, hang the branches in the dark at about 60°F (15-16°C) and 55-60% humidity for 7-14 days, then cure in jars, burping daily for the first weeks to preserve the color and flavor.
Growing Indoors vs Outdoors
Indoors is where Purple Dream Auto is easiest to control. Hold an 18-20 hour schedule, keep a lightly trained canopy under good light, and the 350-400 g/m² indoor yield is reachable in a small tent.
Outdoors, the autoflower trait lets you plant in early spring and harvest fast, and the plant stays compact at up to 120 cm, returning around 200 g. The cool nights near harvest help bring out the purple. Give outdoor plants full sun, nutrient-rich, well-draining soil, and a sheltered spot.
How Tall and How Much? Height and Yield
Height is easy to plan for. Purple Dream Auto stays around 1.1 m, compact and discreet, so it suits small tents, terraces, and balconies with little training needed to keep it in bounds.
On yield, it is a modest producer: about 350-400 g/m² indoors under good light, and around 200 g per plant outdoors. Strong light and an open, lightly trained canopy are the main ways to push the indoor figure higher. You grow this one for its color and ease rather than record weight.
Best US Climates for Purple Dream Auto
As a compact, hardy autoflower, Purple Dream Auto is flexible. Growers in California and the warm West get easy outdoor runs, and the short cycle suits the Pacific Northwest and northern states, where cool autumn nights also deepen the purple.
In the humid Southeast, keep airflow up around the buds late in flower. Its small, discreet size also makes it a strong choice for indoor and balcony growing anywhere. For other varieties, browse our full how-to-grow library.
Common Problems When Growing Purple Dream Auto
A few predictable issues are easy to avoid.
Expecting purple without cool nights
The purple is temperature-driven, not automatic. Without a cooler night period late in flower, the buds may stay green. Widen the day-to-night gap in the last few weeks, but do not stress the plant chasing color.
Expecting a big harvest
This is a modest yielder at around 350-400 g/m2 indoors. Grow it for its color, ease, and relaxing effect, and maximize what it gives with strong light and an open canopy.
Overfeeding a small auto
The compact auto root system burns easily. Start nutrients at half strength and increase only on demand, reading the leaves rather than following the bottle.
Overwatering early
A young plant in a big final pot needs very little water. Soaking the whole medium starves the roots of oxygen during the most time-sensitive part of the grow. Water to demand.
Making the Most of Your Harvest
Do not waste the trim. The resinous sugar leaves make good bubble hash, dry sift, or infused oil. The stems, roots, and fan leaves compost well and feed your next grow.
Is Purple Dream Auto Right for You?
If you want an easy, compact, good-looking autoflower with a gentle, relaxing effect, yes. It is a great first grow and a discreet balcony plant, and the purple finish is a real bonus. Just set yield expectations modestly. For another purple strain with more potency, see our Ayahuasca Purple grow guide.
Frequently Asked Questions
Is Purple Dream Auto indica or sativa?
Purple Dream Auto is indica leaning, listed at 60% indica and 40% sativa, with ruderalis for its autoflower timing. It grows compact and resilient, and the effect is balanced and relaxing: the indica side eases muscles and encourages sleep, while the sativa share keeps it from feeling fully sedating.
Does Purple Dream Auto need a 12/12 light cycle?
No. Purple Dream Auto flowers automatically with age, not day length, so it never needs a 12/12 schedule. Kannabia recommends an 18 to 20 hour light cycle from seedling to harvest. Reducing the light once flowering starts only lowers your daily light and costs yield on a modest producer.
How long does Purple Dream Auto take to grow?
Purple Dream Auto finishes in about 8 to 9 weeks from germination, with a flowering period of roughly 60 to 65 days. For this fast auto the flowering and full cycle run close together. Judge the finish by trichome maturity rather than the day count, as phenotype and environment shift the timing.
How do you get Purple Dream Auto to turn purple?
The purple color is driven by temperature. Give the plant cooler nights, around 60F (15C), in the last two to three weeks of flower, widening the day-to-night gap. Do not overcool or stress it, since ripeness and health matter more than color. Outdoor plants often purple up naturally in cool autumn nights.
How much does Purple Dream Auto yield?
Purple Dream Auto is a modest yielder, at around 350 to 400 g/m2 indoors under good light and about 200 g per plant outdoors. Strong light and an open, lightly trained canopy are the main ways to push the indoor figure higher. You grow this one more for its color and ease than its weight.
How tall does Purple Dream Auto grow?
Purple Dream Auto stays compact at around 1.1 m, or up to 120 cm outdoors, which makes it easy to fit in a small tent, a terrace, or a balcony. It needs little training beyond gentle low stress work to open the canopy, and it stays discreet throughout the grow.
Can you clone Purple Dream Auto?
Not usefully. As an autoflower, a cutting keeps the mother’s age, so it tries to flower straight away as a tiny plant and yields almost nothing. If you want more plants, germinate more seeds. Cloning only makes sense with photoperiod strains, not with autoflowers like this one.
