Mexican Sativa, carried at Growlantis as the Sensi Seeds feminized line, is a classic tall sativa with a clear, energetic high. It crosses a Southern Mexican landrace with Durban and Hash Plant, which keeps the uplifting sativa character while adding cold resistance and a shorter flowering window than most pure sativas. You get a big, productive, daytime strain that works indoors with training and shines outdoors.
This is a photoperiod feminized strain, not an autoflower, so it flowers when you shorten the light cycle. It leans 70% sativa / 30% indica, tests at 18-20% THC, and finishes flowering in 8-10 weeks. The figures below are Sensi Seeds’ breeder values; check your own pack for the exact numbers.
Recommended Strains
Mexican Airlines Auto
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THC | 18% - 20% (Medium) |
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Lineage | (Colombia x Mexican Airlines x Mexico) 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 | 1.31 - 1.64 oz/ft² | 400 - 500 g/m² |
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Life Cycle | 10 - 11 weeks |
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Phenotype | 30% Indica / 70% Sativa |
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Effects | Giggly, Creative, Energetic |
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Flavors | Fruity, Lemon, Pine, Earthy |
Mexican Sativa
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THC | 18% - 20% (Medium) |
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Lineage | Mexican x Durban x Hash Plant |
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Type | Feminized |
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Height | 7.38 ft | 2.25 m |
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Yield | High |
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Yield Indoor | 1.31 - 1.8 oz/ft² | 400 - 550 g/m² |
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Flowering Time | 8 - 10 weeks |
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Phenotype | 30% Indica / 70% Sativa |
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Effects | Happy, Focused, Euphoric |
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Flavors | Spicy, Herbal, Sweet |
Mexican Sativa Grow Info
| Trait | Mexican Sativa (Sensi Seeds) |
| Genetics | Mexican x Durban x Hash Plant |
| Seed type | Feminized (photoperiod) |
| Genetic profile | 70% sativa / 30% indica |
| THC | 18-20% (medium) |
| Flowering time | 8-10 weeks |
| Height | Up to 2.25 m (7.4 ft), a tall sativa |
| Indoor yield | High, about 400-550 g/m² |
| Effects | Happy, focused, euphoric |
| Flavor | Spicy, herbal, sweet, with sandalwood and pine |
These are Sensi Seeds’ published figures for the Mexican Sativa line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Mexican Sativa seed pack.
What Makes Mexican Sativa Worth Growing
This is a grower’s sativa. The Durban and Hash Plant in the cross trimmed the flowering time to 8-10 weeks, which is short for a sativa, and added real cold tolerance, so you are not locked into a tropical climate to finish it. That combination is rare in a true sativa.
The high is the selling point: happy, focused, and energizing, built for daytime, creativity, and social settings rather than the couch. Potency sits in a sensible 18-20% band, and the flavor is subtle while growing (useful for discretion) then opens up after curing into sandalwood, pine, and sweet, spicy notes. Yield is high for the type at 400-550 g/m², provided you give the plant room and light.
Is Mexican Sativa Indica or Sativa?
Mexican Sativa is sativa dominant, about 70% sativa and 30% indica. That shows in both the plant and the effect.
The plant is tall and open, with long branches and spaced-out buds, the classic sativa shape. The high is clear and uplifting, good for getting things done. The 30% indica from the Hash Plant side grounds it slightly, so the energy does not tip into anxiety the way some pure sativas can.
Flowering Time and Total Grow Time
Because this is a photoperiod strain, timing works differently than an autoflower, and the two numbers below are not the same thing.
- Flowering time: 8-10 weeks. This is the bloom stage, and it starts only once you switch the lights to 12/12 (or the outdoor days shorten in late summer).
- Total grow time (seed to harvest): flowering plus however long you veg. A typical indoor run vegges for about 4-6 weeks, so total time from seed is often around 12-16 weeks, but you control it by choosing how long to veg.
The practical point: the 8-10 week figure is the flowering window, not the whole grow. Veg length is yours to set, and it is the main lever for final size on a plant this tall.
Does Mexican Sativa Need a 12/12 Light Cycle?
Yes. Mexican Sativa is a photoperiod strain, so indoors it needs a 12/12 light cycle to start flowering. You keep it under long light (usually 18/6) through veg, then switch to 12 hours on and 12 hours off to trigger bloom.
Outdoors, nature does this for you: the plant flowers as the days shorten in late summer. This is the key difference from an autoflower, which blooms on age no matter the light schedule.
Mexican Sativa Grow Timeline, Week by Week
Veg length is up to you, so treat the flowering weeks as the fixed part and adjust the start to suit your space.
- Weeks 1-2: germination and seedling. The taproot and first leaves establish. Keep water light and conditions stable.
- Weeks 3-6: vegetative growth. The plant builds height fast. Top or train early to control the stretch, and hold it in veg until it is the size you want (shorter veg for small spaces).
- Flip to 12/12: switch the light cycle when the plant is about half its target height, because a sativa can double in size during the flowering stretch.
- Flower weeks 1-3: the stretch. Expect a dramatic height gain. Set your trellis or ties now.
- Flower weeks 4-8: buds form along the long branches and fill in. The subtle grow aroma starts to turn woody and sweet.
- Flower weeks 8-10: ripening and harvest. Judge by the trichomes, not the calendar.
Choosing Your Setup: Space, Light and Pots
Height is the first thing to plan for. At up to 2.25 m, Mexican Sativa is not a plant you flip tall in a short tent. Indoors, give it vertical room, a short veg, and a training plan, or grow it outdoors where height is an asset.
Light should be strong and even to fill out the long, spaced buds. A full-spectrum LED at 30-40 watts per square foot over a trained, flat canopy gets the most from the high yield potential. Pair it with good exhaust, since a 2 m plant moves a lot of air.
For containers, this plant wants root room to support its size. Use 5-7 gallon pots indoors, or larger fabric pots and raised beds outdoors. Unlike an autoflower, a photoperiod can be transplanted, so you can pot up as it grows.
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 70-80°F (21-27°C). A taproot usually shows in two to three days.
When the root reaches about 1-2 cm, plant it root-down a knuckle deep in a light, airy mix and keep the surface moist until it breaks ground. New to germination? Our beginner growing guides walk through it step by step.
The Vegetative Stage and Training
This is where you control a tall sativa. Because it is a photoperiod plant, you can veg as long or as short as you like and use the full range of training, which autoflowers cannot handle.
Top the plant early to break the single dominant cola into several, then use a SCROG net or LST to spread the branches into a wide, even canopy. On a 2 m sativa, this is the difference between a manageable indoor plant and one that grows into the light. Keep nitrogen available through veg, and remember the plant will stretch hard for two to three weeks after you flip to 12/12, so flip before it reaches your ceiling.
Feeding and Watering Mexican Sativa
Feed to the plant’s size. A big, vigorous sativa can take a fuller nutrient schedule than a compact indica, but build up gradually and watch the leaves rather than chasing the bottle. Use a nitrogen-forward base through veg, then shift to a bloom formula higher in phosphorus and potassium once you flip to 12/12.
Water by root-zone moisture. A large plant in a large pot drinks heavily in late veg and early flower, so expect demand to climb, and let the top layer dry between waterings to keep oxygen at the roots.
Flowering and Knowing When to Harvest
Once you flip to 12/12, the plant stretches for two to three weeks, then settles into bud production along its long branches. Buds fill in through the middle weeks, and the aroma turns from faint to a woody, sweet, piney bouquet by late flower.
As the 8-10 week flowering window closes, let the trichomes decide. Harvest when most are cloudy; leave a few extra days for more amber if you want a heavier edge on the otherwise energetic high. 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.
Growing Indoors vs Outdoors
Indoors, the challenge is height. Keep veg short, flip early, and train hard into a flat canopy under strong light. Done right, the high indoor yield of 400-550 g/m² is very reachable.
Outdoors is where this strain is happiest. The Durban and Hash Plant genetics add cold resistance and a shorter flowering window, so it finishes in warm and temperate climates alike, and the tall frame produces big plants in open ground. Plant after the last frost, give it full sun and a large root run, and stake the branches as the colas get heavy.
How Tall and How Much? Height and Yield
Plan for size. Mexican Sativa can reach 2.25 m, especially outdoors or with a long veg, so it needs either open sky or a committed indoor training plan. Flipping to 12/12 earlier and topping are the two main ways to keep it in bounds.
Yield is a strong point: a high 400-550 g/m² indoors under good light and a well-filled canopy, and large totals outdoors from a single big plant. The payoff for managing the height is a genuinely productive sativa.
Best US Climates for Mexican Sativa
This strain suits more of the country than a typical sativa. Growers in California and the warm, sunny West get the long season a sativa loves, with easy finishes and big outdoor plants.
The cold resistance from its Durban and Hash Plant parents also opens up temperate and northern states that struggle with pure sativas, since the 8-10 week flowering finishes before the worst of the fall weather. In the humid Southeast, the open sativa structure helps airflow, but keep an eye on the dense sections late in flower. For other varieties, browse our full how-to-grow library.
Common Problems When Growing Mexican Sativa
Most issues with this strain trace back to its size and sativa habit.
Running out of vertical space
At up to 2.25 m with a big flowering stretch, Mexican Sativa overgrows a short tent fast. Keep veg short, flip to 12/12 early, and top plus SCROG to hold a flat canopy indoors.
Flipping to 12/12 too late
A sativa can double in height after the flip. If you wait until it is already near your light, the stretch puts the colas into the lamp. Flip at about half your target height.
Treating it like an autoflower
This is a photoperiod plant. It will not flower under 18/6, and it needs the light switched to 12/12 indoors. If you want a strain that flowers on its own, look at the autoflowering seeds instead.
Harvesting too early
Sativas tempt growers to cut once the buds look full, but the 8-10 week window and cloudy trichomes are the real signal. Pulling early trades away potency and yield on a plant you waited months for.
Making the Most of Your Harvest
Do not waste the trim. The resinous sugar leaves make good bubble hash, dry sift, or infused oil, and the Hash Plant heritage lends itself well to hash. The stems, roots, and fan leaves compost well and feed your next grow, which is handy after a long sativa run.
Is Mexican Sativa Right for You?
If you want a clear, energetic daytime high and you have the height to spare, outdoors or with an indoor training plan, yes. It rewards you with a high yield, a shorter flowering time than most sativas, and real climate flexibility. If vertical space is tight and you cannot commit to training, a compact indica or an autoflower will be an easier fit.
Frequently Asked Questions
Does Mexican Sativa need a 12/12 light cycle?
Yes. Mexican Sativa is a photoperiod strain, so indoors it needs the light switched to 12/12 to start flowering. You veg it under a longer schedule like 18/6, then flip to 12 hours on and 12 off. Outdoors it flowers naturally as late-summer days shorten.
How long does Mexican Sativa take to flower?
Mexican Sativa flowers in about 8 to 10 weeks, which is short for a sativa thanks to its Durban and Hash Plant genetics. That is the bloom stage only. Total time from seed also includes your veg period, usually four to six weeks indoors, so plan accordingly.
How tall does Mexican Sativa grow?
Mexican Sativa is a tall sativa, reaching up to about 2.25 m, especially outdoors or with a long veg. Indoors you control the height by vegging less, flipping to 12/12 early, and topping. Expect the plant to stretch hard for two to three weeks after the flip.
How much does Mexican Sativa yield?
Mexican Sativa is a high yielder for a sativa, around 400 to 550 g/m2 indoors under strong light and a well-trained canopy. Outdoors a single tall plant can produce large totals. Light intensity, canopy management, and root space are the main factors that move the final weight.
Is Mexican Sativa indica or sativa?
Mexican Sativa is sativa dominant, about 70% sativa and 30% indica, from a Mexican landrace crossed with Durban and Hash Plant. It grows tall and open like a sativa and gives an uplifting, focused, daytime high, with just enough indica to keep the energy from feeling edgy.
Can you clone Mexican Sativa?
Yes. As a photoperiod strain, Mexican Sativa clones well, unlike autoflowers. Take cuttings from a healthy plant during veg, root them, and keep them under long light until you are ready to flower. Cloning lets you keep a favorite phenotype and skip germination on your next run.
