Growing Marijuana Indoors: A Beginner's Overview

Indoor cannabis cultivation gives you total control over environment, genetics, and harvest quality. This overview covers the core steps for a first-time soil grow.

Genetics & Germination

• Start with bag seeds or buy feminized/autoflowering seeds from reputable sources.
• Germinate in damp paper towel (24–72 hrs). Taproot emergence = ready to plant.

Space & Light

• Line floor/walls with reflective material (Mylar > white paint > foil).
• Use 250–400W HPS or CMH for 1–2 plants. CFLs work but yield less.
• Hang lights on adjustable ratchets. Add a fan for airflow and heat management.

Containers & Medium

• 3–5 gal fabric pots or buckets with drainage. Organic potting soil, pH 6.0–7.0.
• Plant germinated seed ¼–½" deep. Firm gently.

Light Schedule

• Vegetative: 18–24 hrs light / 0–6 hrs dark.
• Flowering (at ~12" height): 12/12 light/dark. Remove males (pollen sacs) immediately.

Nutrients

• Weeks 1–2: Water only.
• Weeks 3–4: Ramp to veg formula (high N, e.g., 3-1-2).
• Flowering: Bloom formula (high P/K, e.g., 1-3-2). Follow brand schedule; adjust by strain.

Harvest Signal

Trichomes (resin glands) turn from clear → cloudy → amber. Harvest at 90% amber for peak potency. Use 30–60x magnification.

This is a foundation. Drying, curing, and trimming determine final quality. Research deeply, stay legal, and grow responsibly.