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45-day autoflower seeds are fast-finishing strains bred for speed, efficiency, and reliable harvests in short grow cycles. Browse our collection of premium 45-day autoflower genetics, available in feminized autoflower formats and designed for quick turnaround grows without compromising quality or potency.
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45-day autoflower seeds give you the quickest path from seed to harvest. Explore the fastest autoflowers available at Homegrown Cannabis Co. and find premium genetics built for quick cycles, multiple harvests, and maximum grows per season.
45-day autoflower seeds are autoflowering cannabis seeds that complete their full seed-to-harvest cycle in approximately 45 days. Unlike photoperiod plants, autoflower genetics trigger flowering based on the plant's age rather than its light schedule. That means no manual light changes and no waiting for a seasonal cue.
45-day autoflowers complete their full cycle from seed to harvest in approximately 45 days, or 6 to 7 weeks. That includes every stage: seedling, vegetative growth and flowering. No other seed category finishes faster. Standard autoflower varieties typically complete their full cycle in 8 to 14 weeks from germination, depending on genetics and environment.
Here's how the two compare:
| Attribute | 45-Day Autoflowers | Standard Autoflowers |
| Full seed-to-harvest | ~6-7 weeks | ~8-14 weeks |
| Flowering phase | ~3-4 weeks | ~5-7 weeks |
| Seedling + vegetative | ~2-3 weeks | ~2-3 weeks |
Actual times vary by genetics, phenotype and growing conditions.
45-day autoflower seeds suit buyers who need fast results in compact spaces or limited growing windows where cultivation is lawful. Three use cases stand out:
You can browse the full range of weed seeds at Homegrown to compare this category against other speed tiers and seed types.
Choosing the right 45-day autoflower strain starts with three attributes: confirmed flowering time, genetic stability and environment fit.
Cannabinoid profile and yield expectations vary by strain, too. If raw speed isn't your only priority, compare fast-growing marijuana seeds side by side with 45-day autoflower options to find the right fit for you.
45-day autoflower seeds differ from standard autoflower seeds in one key attribute: their flowering window is shorter. Both are autoflowering cannabis seeds that flower based on plant age rather than light schedule. The difference shows up in timeline and, often, in yield potential.
| Attribute | 45 Day Autoflower Seeds | Standard Autoflower Seeds |
| Total seed-to-harvest time | ~6-7 weeks | ~8-14 weeks |
| Plant size | Typically compact to small-medium | Small-medium to medium |
| Yield potential | Lower to moderate (varies by strain) | Moderate to higher (varies by strain) |
| Best for | Speed, fast cycles, limited seasons | Balanced timing and yield |
The fastest autoflowering strains typically produce smaller yields per plant than their slower counterparts. But with a 6-7 week cycle, the potential to run multiple harvests helps balance out your overall returns.
If you're choosing between autoflowers and photoperiod plants, feminized cannabis seeds guarantee female plants without age-based flowering like you get with autos. They require a deliberate light-schedule change to trigger flowering. If you want control over when flowering begins, feminized photoperiod seeds give you that.
Homegrown Cannabis Co. carries a curated selection of 45-day autoflower seeds from verified genetics. Every strain in our catalog comes with detailed spec data, a germination guarantee, and access to the Homegrown community for support throughout your grow.
Yes, 45-day autoflower seeds work well for beginners because autoflower genetics remove the photoperiod management that makes growing more complex. You don't need to adjust your light schedule to trigger flowering. The plant handles that on its own. Compact plant size also means less space to manage and fewer variables to juggle early on.
Yes, Homegrown Cannabis Co. ships cannabis seeds to eligible adult buyers across the USA, subject to federal, state, and local rules. Shipping eligibility and possession limits vary by state and locality. Check federal, state, and local rules in your area before placing an order.
The fastest autoflower strains from seed to harvest typically finish in 6 to 7 weeks total. Strains under the "45-day" autoflowering category fall into this tier. Actual harvest time depends on genetics, growing conditions, and phenotype variation.
No, 45-day autoflowers and fast version seeds are different. 45-day autoflowers carry autoflower genetics and flower based on plant age, not light schedule. Fast version seeds are photoperiod-based strains bred to finish faster than standard photoperiod genetics. They still require a light-schedule change to trigger flowering.
Yes, 45-day autoflower seeds can be grown outdoors where cultivation is lawful under local rules. Their compact size and fast finishing time make them especially useful in climates with short summers or early first frosts. Always verify your local laws before germinating any cannabis seeds.
The number of harvests per year depends on your growing setup, local laws, and how you time your cycles. Indoors, multiple back-to-back cycles are possible with strains that finish in 9 to 12 weeks total. Outdoors, your local growing season and regional rules set the practical limit. Always confirm what is permitted under your local rules before planning your grow schedule.
