How To Grow Purple Lemonade Auto from Seed to Harvest 

Purple Lemonade Auto by Blimburn Seeds is an easy, high-yielding indica-leaning autoflower loved for its sweet citrus-lemon flavor and colorful purple buds. A cross of Purple Lemonade with ruderalis, it carries a solid 20-22% THC, a citrus, lemon, and sweet flavor, and a balanced effect that is energetic and euphoric before easing into relaxation. It finishes its whole cycle in 8-10 weeks, yields well indoors and out, and is simple to grow, which makes it a rewarding, flavorful autoflower. 

Because it is an autoflower, it flowers on its own with age instead of waiting for a change in the light cycle. That makes it fast and simple, but it also changes how you light, train, and time the grow, as explained below. 

Recommended Strains

Purple Lemonade Auto

	THC	20% - 22% (Medium)
	Lineage	Purple Lemonade x Ruderalis
	Type	Autoflowering
	Height	4.92 ft | 1.5 m
	Yield	High
	Yield Indoor	1.31 - 1.64 oz/ft² | 400 - 500 g/m²
	Yield Outdoor	17.64 - 19.4 oz/plant | 500 - 550 g/plant
	Life Cycle	8 - 10 weeks
	Phenotype	70% Indica / 30% Sativa
	Medical	Arthritis, Insomnia, Pain
	Effects	Energetic, Euphoric, Relaxed
	Flavors	Citrus, Lemon, Sweet

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3 Seeds - $426 Seeds - $659 Seeds - $8025 Seeds - $19550 Seeds - $320100 Seeds - $580 Add to cart

Purple Lemonade FF

	THC	25% - 27% (High)
	Lineage	Tangie x Purple Lemonade Auto
	Type	Fast Flowering
	Height	5.58 ft | 1.7 m
	Yield	High
	Yield Indoor	1.47 - 1.8 oz/ft² | 450 - 550 g/m²
	Flowering Time	7 - 8 weeks
	Phenotype	45% Indica / 55% Sativa
	Effects	Focused, Creative, Relaxed, Talkative
	Flavors	Sweet, Lemon, Sour

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3 Seeds - $425 Seeds - $65 Add to cart

Purple Lemonade Auto Grow Info 

These are Blimburn’s published figures for Purple Lemonade Auto at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Purple Lemonade Auto seed pack. 

What Makes Purple Lemonade Auto Worth Growing 

Purple Lemonade Auto is a crowd-pleaser on every front. Its flavor is the headline, a bright, sweet citrus-lemon profile that stands out from the usual earthy autos, and in the right conditions it produces beautiful purple buds. The balanced 20-22% THC effect is energetic and euphoric up front, settling into relaxation, so it works across the day. 

For the grower, it is fast, easy, and productive, an unusual combination for an autoflower. The whole cycle runs about 8-10 weeks from seed, it stays a manageable 1.5 m, and it still yields a high 400-500 g/m² indoors. Its resilient structure forgives mistakes, which makes it great for beginners while still satisfying flavor chasers. 

Is Purple Lemonade Auto Indica or Sativa? 

Purple Lemonade Auto is indica dominant, listed at 70% indica and 30% sativa, from crossing Purple Lemonade with ruderalis. 

That indica lean gives it a relaxing backbone, but the effect stays balanced: an energetic, euphoric lift from the sativa and Lemonade side eases into a calm body relaxation, so it is versatile rather than purely sedative. The plant grows sturdy and resilient with a manageable size, and the small ruderalis influence is what lets it flower on age alone. 

Flowering Time vs Full Grow Time 

For an autoflower, this works differently than for a photoperiod, and understanding it is the key to timing the grow. 

• Full life cycle: around 8-10 weeks from seed to harvest. This is the number that matters most for an auto, since the plant moves through veg and into flower automatically. 

• Flowering portion: flowering begins on its own at roughly 3-4 weeks of age, with no change to the light needed, and runs through to the harvest inside that total window. 

The practical takeaway: you cannot extend the veg stage to grow a bigger plant the way you can with a photoperiod. What you plant is roughly what you get, so the early weeks matter. Keep seedlings healthy and stress-free, because the plant is on a fixed clock. 

Does Purple Lemonade Auto Need a 12/12 Light Cycle? 

No. This is the key difference from photoperiod strains. As an autoflower, Purple Lemonade Auto does not need a 12/12 light cycle to flower. It starts flowering on its own with age, regardless of the light schedule. 

Most growers run 18/6 (18 hours on, 6 off) for the entire life cycle, from seed to harvest. Some use 20/4 for a little more light and growth. There is no flip and no separate flowering schedule. Outdoors it flowers on age too, so in a warm, long season you can fit more than one crop in a year. 

Purple Lemonade Auto Grow Timeline, Week by Week 

With an auto, the timeline is on a fixed clock, so these stages happen on schedule rather than when you decide. 

• Weeks 1-2: germination and seedling. The taproot and first true leaves establish. Keep things gentle and stress-free, since the clock is already running. 

• Weeks 3-4: vegetative growth. Fast, sturdy growth under 18/6. Begin gentle low stress training now if you train at all. 

• Weeks 4-5: pre-flower and stretch. The plant starts flowering on its own and sets its structure. 

• Weeks 5-9: flowering. Buds form and fill out, color may begin to show, and the citrus-lemon aroma develops. 

• Weeks 8-10: ripening and harvest. Judge by trichomes, not just the calendar. 

Choosing Your Setup: Space, Light and Pots 

Purple Lemonade Auto reaches a manageable 1.5 m, so it fits most tents comfortably. Give it strong, consistent light on an 18/6 schedule for the whole cycle to back the yield and bring out the color. A full-spectrum LED at 30-40 watts per square foot is plenty. 

The single most important setup choice for an auto is the pot. Plant in the final container from the start, ideally a 3-5 gallon fabric pot, and do not transplant. Autos dislike root disturbance, and because they are on a fixed clock they have no time to recover from transplant stress. Fabric pots also improve airflow and help prevent overwatering. 

Germinating and Raising Seedlings 

The paper towel method is the simple, reliable start. Soak the seeds for 12-24 hours, then place them between damp paper towels on a covered plate, kept dark and warm at 70-85°F (21-29°C). A taproot usually appears within two to three days. 

When the taproot reaches about 1-2 cm, plant it root-down a knuckle deep directly into its final pot and keep the surface moist until the seedling emerges. Hold off on nutrients at this stage. With an auto, a healthy, stress-free start is especially important because the plant is already on its clock. New to growing? Our beginner growing guides cover germination step by step. 

The Vegetative Stage and Low Stress Training 

Veg is short and automatic with this strain, so the goal is to support fast, healthy growth, not to extend it. Keep it under 18/6 with a light feed and let its sturdy frame build quickly. 

Because the plant is on a fixed clock, stick to low stress training (LST) and skip high-stress techniques. Gently tie down the main stem and branches to open the canopy and expose more bud sites to light, which lifts the already-high yield. Avoid topping and other heavy training, which an autoflower often cannot recover from in time. For the same reason, cloning is not practical with autos, so each plant is a single, seed-to-harvest grow. Train early and gently, during the first few weeks only. 

Feeding and Watering Purple Lemonade Auto 

Autos are light feeders, so go easy. Use a gentle, nitrogen-forward feed at reduced strength through the short veg, then switch to a bloom formula higher in phosphorus and potassium as flowering begins. Start at roughly half the dose you would give a photoperiod and increase only if the plant asks for it. Overfeeding is the most common mistake with autos. 

Water by root-zone moisture, not a timetable. Let the top inch or two of medium dry between waterings, then water thoroughly until a little drains. Fabric pots and this water-to-weight habit keep the roots healthy and prevent overwatering, which small-rooted autos are sensitive to. 

Flowering and Knowing When to Harvest 

Flowering begins on its own at around 3-4 weeks of age. Buds form and fill out through the back half of the cycle, and the sweet citrus-lemon aroma develops, so keep air moving and run a carbon filter indoors. 

For the signature purple color, cool night temperatures in late flower encourage the purple hues, though it is not guaranteed and depends on phenotype and environment. Let ripeness decide the harvest: check the trichomes under a loupe and cut when most are cloudy with a few turning amber. Curing matters on this strain: after harvest, hang the branches in the dark at about 60°F (15-16°C) and 55-60% humidity for 7-14 days, then cure in sealed jars, burping daily for the first couple of weeks and then weekly. A slow, careful cure of three to four weeks is what locks in the bright lemon flavor and smooths the smoke. 

Growing Indoors vs Outdoors 

Indoors, Purple Lemonade Auto is easy and fast. Run 18/6 for the whole cycle, keep it in its final fabric pot, and the manageable size and high 400-500 g/m² yield make it an excellent tent strain with a quick turnaround. 

Outdoors, it is a strong producer, returning up to 500-550 g per plant and finishing fast. Because autos flower on age, not on the season, you are not tied to a single planting window, and in a warm climate you can run more than one crop per year. Cooler nights toward the end of the grow can bring out the purple color. Give it full sun, a light airy soil, and protection from constant wet. 

How Tall and How Much? Height and Yield 

Height is easy to plan for. Purple Lemonade Auto reaches around 1.5 m, a manageable size that fits most tents without aggressive height control. 

On yield it is a strong producer, listed as high at around 400-500 g/m² indoors and 500-550 g per plant outdoors, excellent for a fast autoflower. Strong consistent light, gentle LST to open the canopy, the right final pot, and a careful feed are what turn that potential into real weight of colorful, citrus-rich flower. 

Best US Climates for Purple Lemonade Auto 

As a fast, resilient autoflower, Purple Lemonade Auto suits a wide range of US climates. Its age-based flowering means it is not tied to the season, so growers in cooler or shorter-season states can still get a full outdoor crop, and warm-climate growers in California and the Southwest can run multiple cycles per year. 

It thrives indoors anywhere thanks to its manageable size. Cooler nights late in the grow, common in many regions in early fall, can deepen the purple color. In the humid Southeast, keep airflow strong around the buds to prevent rot. For more options, browse our full how-to-grow guide library. 

Common Problems When Growing Purple Lemonade Auto 

A few predictable, auto-specific issues are easy to head off. 

Transplant shock 

Autos hate root disturbance and have no time to recover on their fixed clock. Plant in the final pot from the start and never transplant. 

Overfeeding 

Autos are light feeders. Start at about half strength and build up only if needed, watching the leaf tips for nutrient burn. 

Expecting guaranteed purple 

The purple color depends on cool nights, phenotype, and environment. A green plant can be just as potent and flavorful, so do not chase color at the cost of a clean grow. 

Rushing the cure 

The bright lemon flavor depends on a slow cure. Do not jar buds before they are properly dried, and burp the jars to avoid trapped moisture. 

Making the Most of Your Harvest 

Do not waste the trim. The resinous sugar leaves make good bubble hash, dry sift, or rosin that keeps the citrus-lemon character. The stems, roots, and fan leaves compost well and feed your next grow. 

Is Purple Lemonade Auto Right for You? 

If you want an easy, fast, high-yielding autoflower with a standout sweet lemon flavor, colorful buds, and a balanced effect, yes. Its flavor, yield, and forgiving nature make it a great pick for beginners and flavor lovers alike. If you want a tall photoperiod to shape with topping or a pure sedative indica, look elsewhere. Browse our full how-to-grow guide library for more. 

Frequently Asked Questions 

Is Purple Lemonade Auto indica or sativa? 

Purple Lemonade Auto is indica dominant, listed at 70% indica and 30% sativa, from crossing Purple Lemonade with ruderalis. Despite the indica lean the effect stays balanced: an energetic, euphoric lift eases into a calm body relaxation, so it suits many times of day. The plant grows sturdy and resilient at a manageable size, flowering on age alone. 

How long does Purple Lemonade Auto take to grow? 

Purple Lemonade Auto completes its whole life cycle in about 8 to 10 weeks from seed to harvest. As an autoflower, it begins flowering on its own at around 3 to 4 weeks of age, with no light-cycle change needed. Confirm the finish by checking trichome maturity rather than the calendar, since conditions shift timing. 

Does Purple Lemonade Auto need a 12/12 light cycle? 

No. As an autoflower, it does not need a 12/12 light cycle to flower. It starts flowering on its own with age. Most growers run 18/6 for the entire life cycle, from seed to harvest, and some use 20/4. There is no flip and no separate flowering schedule, which makes it simple and quick to run. 

How much does Purple Lemonade Auto yield? 

Purple Lemonade Auto is a strong yielder, producing around 400 to 500 g/m2 indoors and 500 to 550 g per plant outdoors, excellent for a fast autoflower. Strong consistent light, gentle low stress training to open the canopy, the correct final pot, and a careful feed are what turn that potential into real weight of citrus-rich flower. 

How do you cure Purple Lemonade for the best flavor? 

Dry the branches slowly in the dark at about 60F and 55-60% humidity for 7 to 14 days, until small stems snap. Then cure in sealed jars, burping daily for the first two weeks. A slow three to four week cure preserves the bright lemon aroma and smooths the smoke, which is key on this flavor-led strain. 

Does Purple Lemonade Auto turn purple? 

It can, but it is not guaranteed. The purple color depends on cool night temperatures in late flower, along with phenotype and environment. Encouraging cooler nights toward the end of the grow brings out the hues, but a plant that stays green is just as potent and flavorful, so grow for health first and treat color as a welcome bonus. 

What does Purple Lemonade Auto taste like? 

Purple Lemonade Auto has a bright, sweet citrus and lemon flavor that stands out from earthier autos. To protect those terpenes, run a carbon filter in flower, dry slowly at around 60F with moderate humidity, and cure in sealed jars, burping daily for the first two weeks. A careful cure keeps the sweet lemon notes vivid and fresh.