Garden HighPro PROBOX Magnum 300L Grow Tent 300×150×220 cm – Extra Large Professional Indoor Grow Tent with 97% Mylar Reflection

The Garden HighPro PROBOX Magnum 300L Grow Tent 300×150×220 cm is an extra-spacious professional indoor grow tent designed for growers who want to achieve maximum control, stability, and efficiency in larger indoor growing setups. Thanks to its large 300 × 150 cm growing area, extra height of 220 cm, durable 600D nylon fabric, and 97% highly reflective Mylar interior, this grow tent creates a stable, efficient, and fully controlled indoor growing environment from seedling to harvest.

This professional grow tent offers ample space for multiple LED grow lights, ventilation systems, carbon filters, and hydroponic setups, making it an ideal choice for larger hobby growing projects and professional indoor growing systems. The sturdy metal frame supports equipment up to 81 kg, allowing heavy lighting and ventilation systems to be safely mounted.

Thanks to its smart design with multiple ventilation openings, cable ducts, and large access doors, the PROBOX Magnum 300L offers maximum flexibility for growers who want to build a spacious, efficient, and stable indoor grow space.

Extra-Large Indoor Grow Tent for Professional Growing Setups

With a large growing area of 4.5 m², the PROBOX Magnum 300L offers ample space for larger plant setups and advanced indoor growing installations. The extra height of 220 cm allows powerful LED grow lights to be positioned at an optimal distance, ensuring better light distribution and a stable growing climate.

This spacious grow tent is particularly suitable for:

• larger indoor grow spaces
• multiple LED grow lights
• hydroponic grow installations
• extensive ventilation systems
• professional indoor growing setups

Depending on pot size and growing method, this tent typically provides space for 12 to 20 plants.

97% Mylar Reflection for Efficient Light Distribution

The interior of the PROBOX Magnum 300L is lined with premium Mylar reflective material with 97% reflection, which distributes light more efficiently throughout the entire grow space.

Advantages of the Mylar interior:

• optimal light reflection within the grow tent
• more efficient use of LED grow lights
• less light loss
• more even light distribution over plants

By optimally utilizing available light, this grow tent helps create an efficient and stable indoor growing environment.

Durable 600D Fabric & Robust Metal Frame

The PROBOX Magnum series is known for its strong construction. The 600D nylon fabric is tear-resistant, durable, and designed to keep light completely inside the tent. This ensures a stable light schedule and minimizes external light penetration.

The sturdy metal frame offers excellent stability and can support heavy equipment such as:

• LED grow lights
• carbon filters
• inline fans
• ventilation systems

With a maximum load capacity of 81 kg, this grow tent is suitable for larger indoor growing installations.

Smart Design with Extensive Ventilation and Cable Openings

A good ventilation system is essential for a stable growing environment. Therefore, the PROBOX Magnum 300L has multiple ventilation openings, cable ducts, and spacious access doors, allowing fans, air ducts, and electrical equipment to be easily installed.

The large doors and windows also make it easy to maintain, train, or harvest plants.

Technical Specifications

• Model: PROBOX Magnum 300L
• Dimensions: 300 × 150 × 220 cm
• Growing Area: 4.5 m²
• Material: 600D nylon fabric
• Reflection: 97% Premium Mylar
• Frame: Sturdy metal construction
• Maximum load capacity: 81 kg

Ventilation & Openings

• Front doors: 2 × 145 × 180 cm
• Front windows: 2 × 35 × 35 cm
• Side doors: 2 × 145 × 115 cm
• Air inlets: 2 × 45 × 20 cm
• Extraction sockets: 8 × Ø 21 cm / Ø 27 cm
• Electrical cable sockets: 4 × Ø 8 cm
• Frame tubes diameter: Ø 2 cm

Why Use a Grow Tent?

A grow tent helps growers create a stable and controlled indoor growing environment where temperature, humidity, ventilation, and lighting can be optimally managed.

Advantages of a grow tent:

• better temperature control
• better humidity regulation
• maximum light reflection
• less light loss
• more efficient use of grow lights

The PROBOX Magnum 300L is ideal for growers who want to build a spacious and efficient indoor grow space with maximum control over climate, lighting, and ventilation.

Why Buy from Amsterdam Grow Supplier

Amsterdam Grow Supplier offers a carefully selected range of professional indoor growing equipment from reliable brands such as Garden HighPro. With fast delivery, competitive prices, and expert advice, we support growers in setting up an efficient and stable indoor growing environment.