How to Grow Mexican Red Hair Auto
Mexican Red Hair Auto is a vigorous, high-yielding, indica-dominant autoflowering strain that crosses Colombian and Mexican landraces with a ruderalis indica. It is a 65/35 indica with a medium 18-20% THC, an earthy, fruity, lemon and pine flavor, and a euphoric, happy, relaxed effect. Fast, easy and productive, it brings classic landrace character to a quick auto grow.
As an autoflowering strain, Mexican Red Hair Auto flowers automatically with age rather than waiting on a change in the light cycle, so there is no need to switch it to shorter days. You simply give it long days from start to finish and it starts flowering on its own after a few weeks, running its whole life cycle in about 8 to 10 weeks from seed to harvest. That speed and simplicity are exactly what make autos so easy to grow.
Recommended Strains
Mexican Red Hair Auto
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THC | 18% - 20% (Medium) |
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Type | Autoflowering |
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Yield | High |
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Phenotype | 65% Indica / 35% Sativa |
CBD Mexican (1:1)
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CBD | 8% (Low) |
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Type | CBD Feminized |
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Yield | High |
|
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Phenotype | 20% Indica / 80% Sativa |
Productive, flavorful and beginner-friendly, Mexican Red Hair Auto is a rewarding auto to grow. You can see the full genetics and buy Mexican Red Hair Auto seeds on the strain page, and browse the rest of our autoflowering seeds alongside it.
Strain Profile at a Glance
| THC | Medium (18-20%) |
|---|---|
| Lineage | Colombian x Mexican x Ruderalis indica |
| Type | Autoflowering |
| Genetics | 65% Indica / 35% Sativa |
| Climate | Temperate |
| Life cycle | 8-10 weeks seed to harvest |
| Harvest (outdoor) | All season |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.8-2.29 oz/ft² (550-700 g/m²) |
| Yield outdoor | 2.12-7.05 oz/plant (60-200 g/plant) |
| Grow difficulty | Easy, beginner-friendly |
| Flavors | Earthy, Fruity, Lemon, Pine |
| Effects | Euphoric, Happy, Relaxed |
Promos & Deals
Growing an Autoflowering Strain
Mexican Red Hair Auto flowers on its own schedule, starting to bloom a few weeks after it sprouts no matter how long the days are. That means you keep it under long light the whole way through, typically 18 hours on and 6 off, or even 20/4, from seedling right to harvest; there is no switch to a shorter day to trigger flowering. The trade-off is that you cannot delay flowering to grow the plant bigger first, so every week of healthy early growth counts.
Because autos grow fast and do not like having their roots disturbed, start Mexican Red Hair Auto in its final pot rather than transplanting it. Sow the seed straight into the container it will finish in, go easy on the feed while it is young, and let it establish without a check. With a short life cycle of around 8 to 10 weeks from seed to harvest, a smooth start is the single biggest thing you can do for a strong, even finish.
Climate and Where to Grow It
Mexican Red Hair Auto suits a temperate climate and, like most autos, it is flexible about when you plant it. Because it flowers on age rather than on the season, you can run it at almost any time where the weather is warm enough, which is why its harvest window is listed as all season; outdoors you can even fit in more than one cycle in a long, warm year. At a medium 1.5 m it slips easily into a tent or a sunny spot.
Its yield is exceptional indoors, around 550-700 g/m² in an optimized setup, which makes it a standout producer under lights, though outdoors it is more modest at 60-200 g per plant on its short cycle. As a sturdy, forgiving indica-leaning auto it is easy to grow and genuinely productive, so it suits anyone chasing a big indoor return from a fast plant.
Its character comes from classic landrace roots: a Colombian sativa heritage like Colombian Gold, also available as a Colombian Gold Auto, crossed with a Mexican landrace and a ruderalis indica to make it autoflowering. If you enjoy that old-school landrace style, the Mexican sativa Acapulco Gold Auto shares the same heritage. Keep temperatures around 68-80°F (20-27°C) and humidity sensible through flowering, easing it down as the buds fill out.
Feeding Schedule (EC Guide)
Mexican Red Hair Auto is a heavy indoor producer, but autos want a lighter hand than photoperiod plants, so keep the feed modest and build slowly. Start very light, raise it gently as the plant grows, push a little more phosphorus and potassium through flower, then flush at the end so the earthy, lemon and pine notes come through clean. The ranges below are a starting guide; adjust to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4-0.6 | Very light feed while roots establish in the final pot |
| Early growth | 0.8-1.2 | Raise nitrogen gently as the plant builds size |
| Early flower | 1.2-1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4-1.6 | Peak bloom feed while the buds swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
Mexican Red Hair Auto starts flowering a few weeks from sprouting and runs its whole cycle in about 8 to 10 weeks from seed to harvest, with no change in the light cycle needed. It fills out with chunky, resinous buds on a medium frame, sometimes showing the reddish pistils that give it its name, and develops an earthy, fruity, lemon and pine aroma. Because it flowers on age, its harvest comes on a fixed, quick timeline.
Yields are very high indoors at around 550-700 g/m² and more modest at 60-200 g per plant outdoors on its short cycle. Keep the colas supported and the canopy open so the lower buds get light, feed it lightly through flower, and harvest when most of the trichomes have turned cloudy with a few amber for the fullest earthy, lemon-pine flavor and the most rounded effect.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15-18°C) and 55-60% humidity for 7-14 days, until the thin stems snap rather than bend. A slow, even dry matters with such resinous buds, because they can stay damp in the middle while the outside dries, and a gentle dry protects the earthy, lemon and pine aroma that gives this landrace cross its character.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure is what brings out the earthy, fruity, lemon-pine notes and smooths the smoke, turning a freshly dried auto harvest into the clean, classic result Mexican Red Hair is known for.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Mexican Red Hair Auto is a resinous plant, so its trim is useful for dry sift, bubble hash or rosin. That resin and earthy, lemon-pine aroma make the trim worth keeping, turning offcuts into a flavorful concentrate run rather than waste, which is a nice bonus on top of its heavy indoor flower yield.
Flavor and Terpenes
Mexican Red Hair Auto leads with an earthy, fruity flavor lifted by bright lemon and a clean pine freshness, a classic landrace profile. It is a smooth, natural-tasting smoke that reflects its Colombian and Mexican roots, and a good cure brings that earthy, lemon-and-pine character forward in the jar and on the inhale.
Its terpene profile shapes that flavor. Myrcene forms the earthy, slightly fruity base, while terpinolene adds a fresh, piney, zesty lift that carries the lemon note. Caryophyllene brings a peppery, spicy edge, and linalool a soft, floral touch. Together these four terpenes give the strain its clean, earthy, fruity character with that bright citrus-pine top.
Effects and Best Use
With its medium 18-20% THC and 65/35 indica-leaning make-up, Mexican Red Hair Auto delivers a balanced, approachable experience. It is reported as euphoric, happy and relaxed, pairing an upbeat, cheerful head with a comfortable, settled body, which makes it a versatile strain for daytime or evening use. The moderate potency makes it easy to enjoy without feeling overwhelming.
That euphoric, happy, relaxed profile makes it a rewarding strain for unwinding or sharing with friends, alongside its earthy, lemon-pine flavor. The combination of a fast, high-yielding indoor auto grow, a friendly potency and a classic landrace taste is exactly why this Mexican Red Hair autoflower stands out.
Common Problems and Pro Tips
Mexican Red Hair Auto is forgiving, but autos reward a careful start. Sow it straight into its final pot to avoid a transplant check, go light on the nutrients while it is young, and do any training early and gently, because once an auto starts flowering it will not recover lost time. Stick to low-stress training only, and only while the plant is still growing.
At a medium 1.5 m it is easy to manage, so the main jobs are a smooth start, strong light to feed its heavy indoor yield, and keeping the air moving around its resinous buds. Defoliate a few of the largest fan leaves if the center gets crowded so light reaches the lower buds, and support the heavier colas as they fill out toward the end.
As a pro tip, lean into its strength as an indoor producer: give it plenty of light, a big enough final pot and an open canopy to chase that 550-700 g/m², keep the feed modest, and protect the flavor with a proper plain-water flush and a full three to four week cure. Save the trim for concentrates, and harvest when most trichomes are cloudy with a few amber for a clean, earthy, lemon-pine result.
FAQ
Is Mexican Red Hair Auto an autoflowering strain?
Yes. Mexican Red Hair Auto flowers automatically with age rather than on a change in the light cycle, so you keep it under long days, usually 18/6 or 20/4, from seedling to harvest. It starts flowering on its own a few weeks after sprouting and runs its whole life cycle in about 8 to 10 weeks from seed to harvest, which makes it fast and simple to grow.
Should I transplant Mexican Red Hair Auto?
No. Autos grow fast and do not like having their roots disturbed, so start Mexican Red Hair Auto straight in its final pot rather than transplanting it. Sow the seed into the container it will finish in, go easy on the feed while it is young, and let it establish without a check. A smooth, uninterrupted start is the single biggest thing you can do for a strong finish.
How much THC does Mexican Red Hair Auto have?
Mexican Red Hair Auto is a moderately potent strain, testing from about 18% up to 20% THC depending on the phenotype and how it is grown. Combined with its 65/35 indica-leaning genetics, the result is a euphoric, happy, relaxed effect. The medium potency makes it approachable and easy to enjoy, including for less experienced smokers.
How much does Mexican Red Hair Auto yield?
It is an exceptional indoor producer, giving around 550-700 g/m² in an optimized setup, which is high for an auto. Outdoors it is more modest at 60-200 g per plant on its short cycle. Give it strong light, a big enough final pot and an open canopy to get the most from its heavy indoor flower production.
What does Mexican Red Hair Auto taste like?
It has an earthy, fruity flavor lifted by bright lemon and a clean pine freshness, a classic landrace profile. Myrcene brings the earthy base, terpinolene a fresh piney lift that carries the lemon, caryophyllene a peppery edge and linalool a soft floral note. A proper cure brings that earthy, lemon-pine character forward on the inhale.
Is Mexican Red Hair Auto good for beginners?
Yes. Mexican Red Hair Auto is a forgiving, fast autoflower that suits newer growers well, with a manageable 1.5 m height and a quick 8 to 10 week cycle from seed to harvest. Start it in its final pot, keep the feed light, and it practically grows itself, rewarding you with a heavy indoor yield and a friendly, moderate potency.
