Guava x Gelato 41 Auto is a Green House Seed Co. autoflower that pairs a sweet, tropical guava and creamy gelato flavor with a fast, compact grow. It is an indica-leaning hybrid at 20-21% THC with a balanced, functional effect, and it finishes flowering in just 7-8 weeks. Compact size, high resin, and a quick turnaround make it a strong pick for small spaces and dessert-flavor fans.
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 Green House breeder values; check your own pack for the exact numbers.
Recommended Strains
Guava X Gelato 41 Auto
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THC | 20% - 21% (Medium) |
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Lineage | Guava x Gelato 41 Auto |
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Type | Autoflowering |
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Height | 3.61 ft | 1.1 m |
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Yield Outdoor | 2.82 oz/plant | 80 g/plant |
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Life Cycle | 9 - 10 weeks |
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Phenotype | 70% Indica / 30% Sativa |
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Effects | Relaxed, Creative |
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Flavors | Sweet, Fruity, Cream |
Guava Auto
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THC | 27% - 28% (High) |
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Lineage | Guava x Ruderalis |
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Type | Autoflowering |
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Height | 3.28 ft | 1 m |
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Yield | High |
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Yield Indoor | 1.47 - 1.8 oz/ft² | 450 - 550 g/m² |
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Life Cycle | 8 - 9 weeks |
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Phenotype | 50% Indica / 50% Sativa |
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Effects | Relaxed, Happy, Uplifted |
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Flavors | Fruity, Guava, Sweet |
Guava x Gelato 41 Auto Grow Info
| Trait | Guava x Gelato 41 Auto (Green House Seed Co.) |
| Genetics | Guava x Gelato 41 (autoflowering) |
| Seed type | Autoflowering |
| Genetic profile | 70% indica / 30% sativa |
| THC | 20-21% (medium) |
| Flowering time | 7-8 weeks (full cycle about 9-10 weeks) |
| Height | About 1.1 m (100-130 cm indoors) |
| Indoor yield | Up to 500 g/m² |
| Outdoor yield | Around 80-100 g per plant |
| Effects | Relaxed, creative, uplifting |
| Flavor | Sweet, fruity, creamy guava and gelato |
These are Green House Seed Co.’s published figures for the Guava x Gelato 41 Auto line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Guava x Gelato 41 Auto seed pack.
What Makes Guava x Gelato 41 Auto Worth Growing
This one is about flavor and convenience. The Guava and Gelato 41 parents give it a sweet, tropical, creamy taste that stands out, and the autoflower genetics wrap it in a fast, compact, low-effort grow. At up to 500 g/m² indoors on a 7-8 week flower, it delivers real quality without a long wait or a big footprint.
The effect is well-rounded rather than heavy. Despite the indica lean, it is described as relaxed, creative, and uplifting, the kind of balanced feel that works in the daytime as easily as the evening. Backed by a myrcene, linalool, and humulene terpene mix, it reads as a tasty, easygoing strain rather than a knockout. Note that this is a different strain from the separate Guava Auto; this guide covers the Guava x Gelato 41 cross.
Is Guava x Gelato 41 Auto Indica or Sativa?
Guava x Gelato 41 Auto is indica leaning, listed at 70% indica and 30% sativa, with ruderalis in the mix for its autoflower timing.
The genetics give a compact, sturdy, resinous plant that is easy to keep in a small space. The effect, though, is more balanced than the ratio suggests: a relaxed, comfortable body feel paired with a creative, uplifting head, which is why it is often treated as a functional, all-day strain rather than a pure couch-lock indica.
Flowering Time vs Full Grow Time
Autoflowers confuse a lot of growers on timing, and this strain actually publishes both numbers, so the distinction is clear.
- Flowering time: 7-8 weeks. This is the bloom stage, the window where buds form and ripen.
- Full grow time (seed to harvest): about 9-10 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 9-10 weeks is the complete seed-to-harvest cycle. Plan around the full cycle, and remember the plant moves into bloom on its own partway through.
Does Guava x Gelato 41 Auto Need a 12/12 Light Cycle?
No. Guava x Gelato 41 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. Keep the longer schedule and strong light intensity instead.
Guava x Gelato 41 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 starts to build.
- Weeks 7-8: main flower development. Dense buds form and the sweet guava and cream aroma gets stronger.
- Weeks 9-10: maturation and harvest. Most plants finish here. Judge ripeness by the trichomes, not the day count.
Choosing Your Setup: Space, Light and Pots
Guava x Gelato 41 Auto is built for small spaces. At around 1.1 m (100-130 cm indoors) it fits a standard tent, and its compact, sturdy structure suits a Sea of Green or a lightly trained canopy.
Light drives the yield, so give it a strong source. A full-spectrum LED at 25-35 watts per square foot, starting 12-18 inches above the canopy, keeps the resinous buds dense. Add an inline exhaust fan and a carbon filter, since the sweet aroma builds through 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 weight by harvest. 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 Guava x Gelato 41 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.
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 over the 7-8 week flowering window. The sweet guava and creamy gelato aroma develops through the middle weeks, so keep air moving and run a carbon filter indoors.
As the 9-10 week finish approaches, let the plant decide. Check trichomes under a loupe and harvest when most are cloudy with a few turning 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 that sweet flavor. Drying and curing come after harvest and are not part of the seed-to-harvest count.
Growing Indoors vs Outdoors
Indoors is where this strain is at its best. Hold 18/6 the whole way, run a trained canopy under strong light, and the 500 g/m² indoor yield is well within reach in a standard tent.
Outdoors, the autoflower trait lets you plant after the last frost and harvest in about nine to ten weeks, fitting more than one run into a long warm season. It performs best in warm, stable climates, reaching 100-120 cm with yields around 80-100 g per plant, so it earns its keep indoors more than in open ground. Give outdoor plants full sun and well-draining soil.
How Tall and How Much? Height and Yield
Height is easy to plan for. Guava x Gelato 41 Auto stays around 1.1 m (100-130 cm indoors), compact and sturdy, so it suits small tents and SOG setups with little training needed to keep it in bounds.
On yield, it is a strong indoor producer: up to 500 g/m² indoors under strong light, and around 80-100 g per plant outdoors. Strong light and an open, lightly trained canopy are the main ways to push the indoor figure toward the top of its range.
Best US Climates for Guava x Gelato 41 Auto
This strain does best in warm, stable climates. Growers in California and the warm West get easy outdoor runs with its short cycle and compact size.
The fast autoflower timing also helps growers in the northern states and Pacific Northwest, where a plant that finishes in nine to ten weeks can beat the fall rains. In the humid Southeast, keep airflow up around the dense, resinous buds. Its small size makes it a strong indoor choice anywhere, which is where it yields best. For other varieties, browse our full how-to-grow library.
Common Problems When Growing Guava x Gelato 41 Auto
A few predictable issues are easy to avoid.
Confusing it with Guava Auto
Guava x Gelato 41 Auto and the separate Guava Auto are different strains with different genetics and timelines. Make sure you are following the guide for the seeds you actually bought.
Expecting big outdoor yields
Outdoor returns are modest at around 80-100 g per plant. The high yield is an indoor figure, so lean on indoor light if weight is the goal.
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.
Humidity in dense, resinous buds
The high resin and compact buds can trap moisture. Keep late-flower humidity down and air moving around the canopy to protect the harvest.
Making the Most of Your Harvest
Do not waste the trim. The high-resin sugar leaves make good bubble hash, dry sift, or infused oil that keeps the sweet, creamy flavor. The stems, roots, and fan leaves compost well and feed your next grow.
Is Guava x Gelato 41 Auto Right for You?
If you want a fast, compact autoflower with a standout sweet guava and gelato flavor and a balanced, functional effect, yes. It is easy to grow, productive indoors, and quick to finish, which makes it a great pick for small spaces and flavor chasers. Just set outdoor yield expectations modestly. For another dessert-flavored option, our Wedding Cake Gelato grow guide is a good next read.
Frequently Asked Questions
Is Guava x Gelato 41 Auto indica or sativa?
Guava x Gelato 41 Auto is indica leaning, listed at 70% indica and 30% sativa, with ruderalis for its autoflower timing. It grows compact and resinous, but the effect is more balanced than the ratio suggests: a relaxed body feel with a creative, uplifting head, so many growers treat it as a functional all-day strain.
Does Guava x Gelato 41 Auto need a 12/12 light cycle?
No. Guava x Gelato 41 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 Guava x Gelato 41 Auto take to grow?
It flowers in about 7 to 8 weeks, with a full seed-to-harvest cycle of roughly 9 to 10 weeks. The flowering figure is the bloom stage only, which sits inside the full cycle. Individual plants can run slightly longer, so judge the finish by trichome maturity rather than the day count.
How much does Guava x Gelato 41 Auto yield?
Guava x Gelato 41 Auto yields up to 500 g/m2 indoors under strong light and around 80 to 100 g per plant outdoors. It performs best indoors. Light intensity, an open lightly trained canopy, and a healthy root zone are the main ways to push the indoor figure toward the top of its range.
How tall does Guava x Gelato 41 Auto grow?
Guava x Gelato 41 Auto is compact, reaching about 1.1 m, or 100 to 130 cm indoors and 100 to 120 cm outdoors. That makes it easy to fit in a small tent or a Sea of Green. It needs little training beyond gentle low stress work to open the canopy and even out the height.
How does Guava x Gelato 41 Auto taste?
Its flavor is the main draw: sweet and fruity tropical guava layered over a creamy gelato richness, from a terpene profile led by myrcene, linalool, and humulene. The taste comes through strongest after a careful dry and cure, so take your time at harvest to protect those sweet, creamy notes.
Can you clone Guava x Gelato 41 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.
