The total time it takes to grow cannabis indoors from seed to harvest depends on the strain, growing conditions, and method used. On average, it takes 3 to 5 months (8-20 weeks) for a full grow cycle. Here’s a breakdown of the timeline:
📅 Cannabis Growth Timeline (Indoors)
| Growth Stage | Duration | Key Details |
|---|---|---|
| Germination | 1-7 days | Seeds sprout and form taproots. |
| Seedling | 1-3 weeks | First true leaves develop; needs 18-24 hours of light. |
| Vegetative Stage | 3-8 weeks | Rapid growth, bigger leaves; light cycle: 18/6 or 20/4. |
| Flowering Stage | 6-12 weeks | Buds develop; switch light cycle to 12/12. |
| Harvest & Drying | 1-2 weeks | Cut, dry, and cure buds for best potency. |
🌱 Factors Affecting Growth Time
- Strain Type
- Autoflowers: 8-12 weeks total (fastest option).
- Indicas: 3-4 months total (shorter flowering time).
- Sativas: 4-5 months total (longer flowering period).
- Growing Conditions
- Hydroponics = Faster growth (~1-2 weeks quicker than soil).
- Temperature & Humidity must be controlled for optimal results.
- Training Methods (LST, topping, SCROG, etc.)
- Training extends veg time but boosts yield.
- Harvest Timing
- Early = more energetic effects.
- Late = heavier, sedative effects.
🔥 Quickest Way to Harvest?
- Use Autoflower Seeds (Ready in 8-12 weeks).
- Grow in Hydroponics (Speeds up veg phase).
- Optimize Lighting (Use high-quality LED grow lights).
