10x5 grow tent with pro-grade Mylar, steel frame, and 14 vent ports—built for high-output HID or LED indoor cultivation.

The Secret Jardin Dark Room 300 Wide V4.0 is a high-capacity professional grow tent built for serious indoor cultivators. Measuring 10 feet wide, 5 feet deep, and 7.1 feet tall, this model provides ample space for large-scale grows while maintaining maximum light efficiency and environmental control.

Constructed with robust 210D canvas and lined with 95% reflective hammered-effect Mylar, the DR300W boosts light intensity and distribution across your canopy. Its reinforced steel frame and durable plastic corners ensure structural strength and long-term reliability.

Features

• Highly-Reflective Lining: 95% reflective, light-proof, and washable Mylar lining for superior light intensity and distribution
• 210D Fabric: Rugged canvas with 2.5x the tear strength and 3x more abrasion resistance than standard tents
• Steel Q195 Poles: 0.75" diameter x 0.02" thick galvanized steel poles ensure robust structural support
• Extra-Strength Corners: 0.2" thick PP transparent corners, 3x stronger than standard plastic
• Lighting Holders & Filter Straps: Includes 4 lighting holders and filter strap kit, each rated for 30 lbs
• Ventilation Ports: 14 total ports with dual-sleeve design and tightening cords
  • 4 cable ports (3")
  • 2 intake ports (11")
  • 4 exhaust ports (11")
  • 2 cool tube ports (11")
• Mesh Windows: 2 removable 20" x 12" mesh windows allow observation without disturbing conditions
• Water Tray: Removable 210D Mylar floor tray for spill management
• Accessory Kit: Includes adjustable tool pouch, 1 pair filter straps, 2 pairs light hooks, and 30 clips for cables/nets

Recommended Lighting Setup:

• HID: 2 × 1000 watts

• LED: 2 × 600 actual watts

Recommended Extraction:

• HPS Setup: 744 CFM with 372 CFM intake every 30–60 seconds

• LED Setup: 372 CFM with 186 CFM intake every 1–2 minutes

What's Included?

• Ducting Flange (Ventilation port adapter)
• Cutting Tool (Precision cutter for duct installation)
• Connectors (Fits 150–160–200–250 mm / 6”–6½”–8”–10”)
• Light Baffle (Optional airflow light trap)
• Cable Flange (Sealed cable pass-through)
• Cutting Tool (Hole cutter for cable flange)
• Space Booster (Structural reinforcement poles)
• Removable Liner (Detachable floor liner)
• WebIT (Plant support netting)
• CableIT (Cable management clips)
• StrapIT (Support strap for hanging equipment)
• 6x T25-120 (Blue bars)
• 6x T25-100 (Medium bars)
• 52x T25-75 (Short bars)
• 32x T25-Link (Connector rods)
• 8x C25-Y (3-way connectors)
• 2x C25-K (Corner connectors)
• 2x C25-T (T-connectors)
• 16x C25-SB (Straight bar brackets)
• 10x C25-H (Horizontal connectors)

Download Resources

Secret Jardin Wide Dark Room 300 Grow Tent (10 x 5 x 7.1 Feet) V4.0 Video