Break-Up Cake Auto is a Kannabia autoflower that combines dessert-strain genetics with a big, fast harvest. From Girl Scout Cookies x Cherry Pie, the same lineage behind Wedding Cake, it is an indica-dominant plant at 21-22% THC with a fruity, citrus-and-berry flavor. It yields unusually well for an autoflower and finishes in about 70 days, which makes it a standout for growers who want quality and quantity without a long wait.
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.
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Break-Up Cake Auto
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THC | 21% - 22% (Medium) |
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Lineage | Girl Scout Cookies x Cherry Pie |
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Type | Autoflowering |
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Height | 3.94 ft | 1.2 m |
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Yield | High |
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Yield Indoor | 1.64 - 1.97 oz/ft² | 500 - 600 g/m² |
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Yield Outdoor | 17.64 - 21.16 oz/plant | 500 - 600 g/plant |
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Life Cycle | 7 - 8 weeks |
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Phenotype | 60% Indica / 40% Sativa |
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Effects | Balanced |
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Flavors | Fruity, Citrus |
Break-Up Cake
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THC | 21% - 22% (Medium) |
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Lineage | Girl Scout Cookies x Cherry Pie |
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Type | Feminized |
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Height | 3.94 ft | 1.2 m |
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Yield | High |
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Yield Indoor | 1.97 oz/ft² | 600 g/m² |
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Yield Outdoor | 21.16 oz/plant | 600 g/plant |
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Flowering Time | 7 - 8 weeks |
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Phenotype | 60% Indica / 40% Sativa |
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Effects | Balanced |
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Flavors | Fruity, Citrus |
Break-Up Cake Auto Grow Info
| Trait | Break-Up Cake Auto (Kannabia) |
| Genetics | Girl Scout Cookies x Cherry Pie |
| Seed type | Autoflowering |
| Genetic profile | 60% indica / 40% sativa |
| THC | 21-22% (medium-high) |
| Flowering time | 7-8 weeks (full cycle about 70 days) |
| Height | Around 1.2 m (up to 1.1 m indoors) |
| Indoor yield | High, 500-600 g/m² |
| Outdoor yield | 500-600 g per plant |
| Effects | Balanced, relaxing yet functional |
| Flavor | Fruity, citrus, berry, earthy pine |
These are Kannabia’s published figures for the Break-Up Cake Auto line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Break-Up Cake Auto seed pack.
What Makes Break-Up Cake Auto Worth Growing
The headline is yield on an autoflower. At up to 600 g/m² indoors and 500-600 g per plant outdoors, Break-Up Cake Auto produces like a photoperiod while keeping the autoflower’s simple, fast cycle of about 70 days. For a big, quick harvest, it is hard to beat.
It also tastes the part. The Girl Scout Cookies and Cherry Pie parents, the same cross behind Wedding Cake, give it a sweet, fruity, citrus-and-berry flavor with an earthy pine edge. The effect is balanced and surprisingly functional for an indica-dominant strain: mental relaxation with a gentle physical calm that lets you stay active, at a solid 21-22% THC.
Is Break-Up Cake Auto Indica or Sativa?
Break-Up Cake 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 high. The plant is a sturdy, resinous, manageable size. The effect, though, does not overwhelm: it pairs a relaxed body feel with enough clarity to stay engaged, so it works through the day as well as the evening. It is a well-rounded, versatile strain rather than a pure couch-lock indica.
Flowering Time vs Full Grow Time
Autoflowers confuse a lot of growers on timing, so it is worth being precise.
- Flowering time: 7-8 weeks. This is the bloom stage, where the buds form and ripen.
- Full grow time (seed to harvest): about 70 days (roughly 10 weeks). This covers the whole cycle, with flowering happening inside it rather than after a separate long veg period.
The takeaway: the 7-8 week figure is flowering only, while around 70 days is the complete seed-to-harvest cycle. Plan around the full cycle, and enjoy a fast finish for such a heavy yielder.
Does Break-Up Cake Auto Need a 12/12 Light Cycle?
No. Break-Up Cake Auto flowers on age, not day length, so it never needs a 12/12 photoperiod to bloom.
Indoors you can hold a longer schedule like 18/6 or 20/4 from seedling to harvest. Dropping to 12/12 once flowering starts only cuts daily light and costs you yield, which matters on a heavy producer like this. Keep the longer schedule and strong light instead.
Break-Up Cake 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 productive 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: main flower development. Dense, resinous buds build and the fruity, citrus aroma gets strong.
- Weeks 9-10: maturation and harvest. Most plants finish around day 70. Judge ripeness by the trichomes, not the day count.
Choosing Your Setup: Space, Light and Pots
Break-Up Cake Auto is easy to house for the yield it gives. At around 1.2 m, or up to 1.1 m indoors, it fits a standard tent, and its structure suits a Sea of Green that spreads the canopy and lifts the already-high yield.
Light drives that yield, so give it a strong source. A full-spectrum LED at 30-40 watts per square foot on an 18-20 hour schedule keeps the dense buds packed. Add an inline exhaust fan and a carbon filter for the fruity aroma.
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 and a Sea of Green are what realize this strain’s big yield. Spreading the branches opens the canopy and gets light to the lower buds, adding real weight. Skip topping and other high-stress cuts, since an autoflower has little time to recover before the clock flips it into flower.
Feeding and Watering Break-Up Cake Auto
Feed to match the yield, but build up gradually. A heavy producer can take a fuller bloom schedule than a small auto, yet the compact auto root system still burns if you rush it. Start nutrients at about half the label strength, use a nitrogen-forward base through veg, then move to a bloom formula higher in phosphorus and potassium as flowering sets in.
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 large and productive, demand climbs, so increase water gradually by pot weight and how fast the top layer dries.
Flowering and Knowing When to Harvest
Flowering begins on its own around week four, with a short stretch and the first pistils, then dense, resinous buds build fast. The fruity, citrus, and berry aroma develops through the middle weeks, so keep air moving and run a carbon filter indoors.
As the 70-day finish approaches, let the plant decide. Check trichomes under a loupe and harvest when most are cloudy with a few amber. 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 protect the dessert flavor.
Growing Indoors vs Outdoors
Indoors is where Break-Up Cake Auto is easiest to dial in. Hold 18/6, run a Sea of Green under strong light, and the high 500-600 g/m² indoor yield is reachable in a standard tent.
Outdoors, the autoflower trait lets you plant after the last frost and harvest in about ten weeks, and unusually for an auto it returns a big 500-600 g per plant in good conditions. Give outdoor plants full sun and well-draining soil, and fit more than one run into a long warm season.
How Tall and How Much? Height and Yield
Height is easy to plan for. Break-Up Cake Auto stays around 1.2 m, or up to 1.1 m indoors, compact enough for a standard tent with little training needed beyond opening the canopy.
On yield, it is a high producer for an autoflower: 500-600 g/m² indoors and 500-600 g per plant outdoors. Strong light, a Sea of Green or open trained canopy, and healthy roots are what let it hit the top of those ranges, which are excellent for an auto.
Best US Climates for Break-Up Cake Auto
As a compact, fast, high-yielding autoflower, Break-Up Cake Auto is flexible. Growers in California and the warm West get big, easy outdoor runs, and the short cycle suits the Pacific Northwest and northern states, where it finishes before the fall rains.
In the humid Southeast, keep airflow up around the dense buds. Its strong indoor yield also makes it a great choice for tents anywhere. For a strain with the same dessert lineage, see our Wedding Cake Auto grow guide.
Common Problems When Growing Break-Up Cake Auto
A few predictable issues are easy to avoid on a heavy-yielding auto.
Not training for the yield
The big yield comes from an open canopy. Skipping low stress training or a Sea of Green leaves a lot of potential on the table, since light cannot reach the lower buds.
Overfeeding early
A heavy yielder still has a small auto root system at the start. Build the feed up gradually from half strength rather than pushing nutrients early, and read the leaves.
Humidity in dense buds
The dense, resinous buds trap moisture. Keep late-flower humidity down and air moving around the canopy to protect the harvest.
Harvesting by the calendar
The 70-day finish is a reference, not a cutting date. Read the trichomes and flower maturity before you cut, since phenotype and environment shift the timing.
Making the Most of Your Harvest
Do not waste the trim. A big yielder leaves plenty of resinous sugar leaf for bubble hash, dry sift, or infused oil that keeps the dessert flavor. The stems, roots, and fan leaves compost well and feed your next grow.
Is Break-Up Cake Auto Right for You?
If you want a fast autoflower with a big yield, a dessert-strain flavor, and a balanced, functional high, yes. It produces like a photoperiod on an easy auto cycle, which is rare. Just train it to realize that yield. For a strain with the same Girl Scout Cookies and Cherry Pie lineage, see our Wedding Cake Auto grow guide.
Frequently Asked Questions
Is Break-Up Cake Auto indica or sativa?
Break-Up Cake Auto is indica leaning, listed at 60% indica and 40% sativa, with ruderalis for its autoflower timing, from Girl Scout Cookies and Cherry Pie. The effect is balanced and functional rather than overwhelming: a relaxed body feel with enough clarity to stay active, so it works through the day as well as the evening.
Does Break-Up Cake Auto need a 12/12 light cycle?
No. Break-Up Cake Auto flowers automatically with age, not day length, so it never needs a 12/12 schedule. Indoors you can hold a longer photoperiod like 18/6 or 20/4 from seedling to harvest. Reducing the light once flowering starts only lowers your daily light and costs yield.
How long does Break-Up Cake Auto take to grow?
Break-Up Cake Auto finishes its full seed-to-harvest cycle in about 70 days, roughly 10 weeks, with a flowering stage of 7 to 8 weeks inside that. It is fast for such a heavy yielder. Judge the finish by trichome maturity rather than the day count, as phenotype and environment shift the timing.
How much does Break-Up Cake Auto yield?
Break-Up Cake Auto is a high yielder for an autoflower, at 500 to 600 g/m2 indoors and 500 to 600 g per plant outdoors in good conditions. Those are excellent figures for an auto. Strong light, a Sea of Green or open trained canopy, and healthy roots are what move you toward them.
How tall does Break-Up Cake Auto grow?
Break-Up Cake Auto stays around 1.2 m, or up to 1.1 m indoors, compact enough for a standard tent. Low stress training keeps the canopy open and even, which is how you realize its big yield, and it needs no topping. Most of its height comes during the early flowering stretch.
How strong is Break-Up Cake Auto?
Break-Up Cake Auto tests at a solid 21 to 22% THC, toward the higher end for an autoflower. The effect is balanced rather than overpowering, pairing body relaxation with enough mental clarity to stay functional, which makes it a versatile strain for different times of day and a comfortable choice for most users.
Can you clone Break-Up Cake 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.
