Cannabis Cultivation Guide
GrōHaus carries everything for an indoor cannabis grow — from first seedling to final trim. This guide walks through the gear categories and how they fit together, whether you're running a 2×2 tent or a full room.
What You Need to Grow Cannabis Indoors
Grow Lights
LED grow lights are the standard for modern indoor cannabis. Look for full-spectrum fixtures with high PPFD output and thermal management. HID (HPS/MH) remains popular for large canopies. CMH/LEC offers full-spectrum efficiency between LED and HID.
- LED Grow Lights — highest efficiency, lowest heat, ideal for tents
- HID / HPS / Metal Halide — proven for large yields
- CMH / LEC — full spectrum, UV output, great for quality
- Light Accessories — hangers, timers, reflectors
Grow Tents & Structures
Grow tents create a controlled environment with reflective walls and integrated ventilation ports. Choose a size that fits your space and light footprint.
- Grow Tents — standard and heavy duty options from 2×2 to 10×10
- Complete Grow Tent Kits — tent, light, and ventilation bundled
- Propagation & Seedling Tents — small-footprint clone and veg chambers
Climate & Environment
Cannabis thrives in specific temperature and humidity ranges at each growth stage. Proper airflow and CO2 management are critical for dense, healthy buds.
- Fans & Circulation
- Inline Fans & Ventilation
- Carbon Filters & Odor Control
- CO2 Systems
- Climate Controllers
- Humidifiers & Dehumidifiers
Nutrients & Additives
Cannabis has different nutrient requirements in veg and flower. A base three-part system plus Cal-Mag covers most grows. Organic options available for soil grows.
- Grow / Veg Nutrients
- Bloom / Flower Nutrients
- Hydroponic Nutrients
- Cal-Mag & Supplements
- pH Up / Down
Hydroponics
Hydroponic systems deliver nutrients directly to roots, resulting in faster growth and larger yields compared to soil. DWC, RDWC, and NFT are popular for cannabis.
Propagation & Cloning
Preserve genetics and start fresh plants from cuttings. Aeroponic cloning machines, rooting gels, and propagation trays are all available.
Harvest & Processing
Trimming machines, drying racks, curing containers, and extraction equipment for post-harvest processing.
Meters & Testing
pH and EC meters are essential for hydroponic and soil grows. PAR/PPFD meters help dial in light intensity.
Beginner vs. Advanced Setups
Beginner: 2×2 or 3×3 Tent Setup
Start with a complete grow tent kit that includes a tent, LED, and inline fan. Add a pH meter, nutrients, and soil or coco. Expected investment: $400–$800 for a functional setup.
Advanced: 4×4 to 8×4 with Full Environmental Control
Dedicated grow light matched to canopy size, VPD-controlled environment, CO2 injection, RDWC or coco/drain-to-waste, automated dosing. Requires more monitoring but maximizes yields.
Frequently Asked Questions
How much light does cannabis need?
During veg, cannabis thrives on 18 hours of light per day. During flower, switch to 12/12. PPFD targets: 400–600 µmol/m²/s for veg, 800–1200+ for flower in a CO2-enriched environment.
What's the best grow medium for beginners?
A quality potting mix like Fox Farm Ocean Forest or similar buffered soil is the most forgiving for new growers. Coco coir offers faster growth but requires closer attention to nutrients and pH.
What pH should my water/nutrient solution be?
Soil: 6.0–7.0 pH. Coco/hydro: 5.5–6.2 pH. Use a digital pH meter and calibrate regularly. pH drift is one of the most common causes of nutrient lockout.
How do I control odor?
A properly sized carbon filter paired with an inline fan running at slightly negative pressure (pulling air through the filter before exhausting) is the most reliable solution. Size the filter to the CFM of your fan.
When should I harvest?
The most reliable method is checking trichomes under magnification. Clear trichomes = too early. Milky white = peak THC. Amber = degrading THC, more sedative effect. Most cultivars are ready 8–12 weeks into flower. Use a jeweler's loupe or digital microscope for accurate assessment.