Secret Jardin Dark Street V4 120 4' x 4' x 6'6" Hydroponic Grow Tent

The Secret Jardin Dark Street V4 120 is a premium indoor grow tent designed for gardeners who want a full 4' x 4' growing footprint, dependable light control, strong steel construction, and a complete accessory package ready for a professional indoor setup.

With dimensions of approximately 4 feet wide by 4 feet deep by 6 feet 6 inches tall, the DS120 provides about 16 square feet of floor space while offering substantially more vertical clearance than compact grow tents. That added height gives gardeners more flexibility for taller plants, suspended lighting, ventilation equipment, filters, and environmental controls.

• Grow Space: Approximately 16 sq. ft.
• Reflectivity: 95% Reflective Mylar
• Frame: 16 mm Q195 Steel
• Height: Approximately 6'6"

The enclosure uses Secret Jardin 190M fabric engineered to create a controlled, light resistant growing environment. Inside, a highly reflective Mylar lining returns approximately 95% of available light toward the growing area, helping improve illumination across the full canopy and reducing light lost to the enclosure walls.

The square 4' x 4' footprint works especially well with lighting systems designed around square coverage patterns. This makes it easier to create balanced illumination from the center of the enclosure to the outer edges of the canopy.

The frame is constructed from 16 mm Q195 steel poles paired with reinforced polypropylene corner connectors. This provides a strong structure for properly mounted lighting, ventilation equipment, and accessories while maintaining straightforward assembly.

Secret Jardin includes a Space Booster that helps prevent the tent walls from being pulled inward by negative pressure from an exhaust system. By preserving the shape of the enclosure, the Space Booster helps maintain the full usable canopy area rather than allowing the fabric walls to reduce growing space.

The Space Booster can also support the included WebIT trellis system, giving gardeners a practical way to organize the canopy, maintain plant spacing, and improve access to light across the growing area.

A removable waterproof Water Tray 120 is included to help protect the base of the enclosure from irrigation runoff, spilled water, soil, and routine gardening debris.

The DS120 also includes Secret Jardin accessories for equipment installation and organization, including StrapIT filter straps, HookIT lighting hooks, CableIT cable clips, PocketIT tool storage, Space Booster support, and PatchIT repair material.

The Dark Street V4 platform also supports Secret Jardin DF16 ducting flange technology, allowing gardeners to configure intake and exhaust openings around their specific ventilation requirements.

With approximately 2.9 cubic meters of internal volume, 16 square feet of floor area, 6 feet 6 inches of height, reflective Mylar, steel framing, trellis support, and organized ventilation compatibility, the Dark Street V4 120 provides a complete foundation for a serious indoor garden.

16 Square Feet of Growing Area

The DS120 provides approximately 16 square feet of usable floor space. The 4' x 4' square footprint works well for multiple plant containers, square LED fixtures, trellis supported gardens, propagation trays, environmental equipment, fabric pots, automated watering systems, and organized plant rows. Actual plant capacity depends on container size, plant spacing, lighting coverage, and training method.

6 Foot 6 Inch Height

The enclosure measures approximately 6 feet 6 inches tall. The additional vertical clearance provides more room for taller plants, suspended grow lights, carbon filters, inline fans, ducting, hanging hardware, environmental sensors, and increased light clearance.

190M Tent Fabric

Secret Jardin uses 190M material for the Dark Street V4 enclosure. The fabric is designed to provide strong light containment, durable enclosure walls, reliable environmental separation, resistance to everyday wear, and support around access points and openings.

95% Reflective Mylar Interior

The interior lining provides approximately 95% reflectivity. This helps return light toward the canopy, reduce wasted light, improve side illumination, reduce dim corners, improve fixture efficiency, and support more even coverage.

Designed for Square Lighting Coverage

The 4' x 4' configuration pairs naturally with square grow lights. When selecting lighting, consider fixture dimensions, coverage specifications, fixture wattage, hanging height, heat output, mature canopy dimensions, and available vertical clearance.

Q195 Steel Frame

The frame uses 16 mm Q195 steel poles. The steel construction provides stable structural support, reliable equipment mounting, better resistance to frame flex, strong enclosure alignment, and long term durability.

Reinforced Polypropylene Corners

Polypropylene corner connectors secure the frame sections. These connectors help maintain alignment, reduce movement, simplify assembly, support repeated setup and breakdown, and keep the frame securely connected.

Space Booster Included

The included Space Booster helps stop the enclosure walls from being pulled inward when exhaust equipment creates negative pressure. This helps preserve usable floor space, maintain canopy width, keep fabric away from foliage, maintain enclosure shape, and support the WebIT trellis system.

Negative Pressure Management

Strong exhaust airflow can cause fabric grow tent walls to contract inward. The Space Booster helps reduce this effect while allowing growers to maintain the environmental advantages of negative pressure. Benefits include more usable canopy area, better plant clearance, improved airflow around outer plants, and less contact between plants and tent walls.

WebIT Trellis Support

The included WebIT system can be supported by the Space Booster. The trellis helps gardeners spread plant growth evenly, maintain canopy height, improve light exposure, support branches, organize the growing area, and improve access between plants.

DF16 Ventilation Compatibility

The Dark Street V4 platform supports Secret Jardin DF16 ducting flanges. The DF16 system is designed for configurable ventilation installation. It can support intake ducting, exhaust ducting, inline fans, carbon filters, environmental ventilation systems, and flexible grow room layouts.

Ventilation Ready Design

Proper ventilation helps manage heat, humidity, fresh air exchange, negative pressure, internal air movement, and environmental stability.

Waterproof Water Tray 120

The included Water Tray 120 provides additional protection at the bottom of the enclosure. It helps contain water spills, irrigation runoff, soil, growing media, plant debris, and routine maintenance mess. The removable design also makes cleanup easier between growing cycles.

HookIT Lighting Hooks

A pair of Secret Jardin HookIT hooks is included for lighting installation. These hooks help simplify fixture hanging, keep lighting equipment organized, make height adjustment easier, and reduce improvised mounting hardware.

StrapIT Filter Straps

A pair of StrapIT straps is included for supporting compatible filtration equipment. These straps can help mount carbon filters, ventilation components, and compatible environmental equipment. Always follow the manufacturer’s recommended weight limits when hanging equipment.

CableIT Cable Management

The DS120 includes 15 CableIT clips. These clips can organize lighting cables, fan cords, sensor wires, controller cables, trellis material, and monitoring equipment. Organized wiring improves access and reduces clutter inside the growing area.

PocketIT Tool Storage

The included PocketIT pouch provides adjustable storage for frequently used tools. It can hold items such as measuring tools, plant ties, thermometers, pH meters, EC meters, garden scissors, and small accessories.

PatchIT Repair Accessory

PatchIT is included for minor enclosure repairs or for modifying unused DF16 locations when the ventilation layout changes. This adds flexibility for future equipment configurations.

Designed for Plants Up to Approximately 150 cm

Secret Jardin describes the Dark Street range as suitable for plants approximately 50 cm to 150 cm tall. Actual usable plant height depends on container height, lighting fixture thickness, hanging hardware, required canopy clearance, filter placement, and plant training method.

Ready for Full Cycle Gardening

Unlike smaller propagation focused enclosures, the DS120 provides enough vertical and horizontal room for plants to remain inside throughout a complete growing cycle when appropriate equipment is installed.

Suitable for Home Grow Rooms

The 4' x 4' x 6'6" configuration works well in spare bedrooms, basements, dedicated indoor garden rooms, utility areas, larger closets, and controlled indoor spaces.

Recommended Setup Practices

• Read the Secret Jardin instructions before assembly.
• Assemble the frame on a clean and level surface.
• Confirm every steel pole connection is properly seated.
• Install the fabric without forcing corners or seams.
• Install the Water Tray before adding containers.
• Install the Space Booster before filling the enclosure.
• Keep electrical connections elevated from the floor.
• Route wiring using the included CableIT clips.
• Match lighting coverage to the full 4' x 4' footprint.
• Keep ventilation pathways clear.
• Support heavy equipment appropriately.
• Maintain adequate space between hot equipment and enclosure walls.
• Follow all electrical and fire safety instructions supplied with installed equipment.

Assembly Overview

A typical setup includes:

• Assemble the lower steel frame.
• Install the vertical poles.
• Connect the upper frame.
• Confirm all polypropylene corners are secure.
• Position the 190M enclosure around the frame.
• Install the Water Tray 120.
• Add the Space Booster.
• Install the WebIT trellis.
• Hang lighting using HookIT.
• Install filtration using StrapIT when appropriate.
• Organize electrical cables using CableIT.
• Attach PocketIT.
• Configure the DF16 ventilation system.
• Inspect the finished enclosure for unwanted light gaps.

Lighting Setup

When installing lighting:

• Choose a fixture designed for approximately 4' x 4' coverage.
• Verify fixture dimensions before installation.
• Use secure hanging hardware.
• Maintain manufacturer recommended canopy distance.
• Account for mature plant height.
• Keep electrical components dry.
• Recheck fixture height throughout plant development.

Ventilation Planning

When configuring ventilation:

• Position exhaust equipment high in the enclosure when practical.
• Allow cooler incoming air to enter lower in the tent.
• Use compatible DF16 components.
• Keep duct runs reasonably short.
• Minimize unnecessary duct bends.
• Match fan capacity to lighting heat output.
• Use the Space Booster if negative pressure pulls the walls inward.

Internal Air Circulation

Circulation fans help move air throughout the 4' x 4' area. Good circulation can help reduce stagnant air, balance temperatures, reduce localized humidity, move air below the canopy, and improve environmental consistency.

Cable Management

Use the included CableIT accessories to route grow light cords, fan cables, controller wiring, sensors, and monitoring equipment. Keep all electrical connections away from water and avoid overloading circuits.

Plant Arrangement

The square interior can support one large central canopy, four larger plant containers, multiple smaller containers, trellis managed plants, propagation trays, and compact hydroponic systems. Maintain sufficient room for air circulation, watering, inspection, equipment access, and safe wiring.

Trellis Setup

When using the WebIT system: position the net at the appropriate canopy height, spread branches evenly across the growing area, avoid excessive tension on the frame, maintain access around plants, leave room for airflow beneath the canopy, and adjust plant growth throughout development.

Cleaning & Maintenance

Routine Interior Cleaning

• Disconnect electrical equipment.
• Remove plants and loose items where practical.
• Sweep or vacuum loose debris.
• Wipe reflective Mylar with a soft cloth.
• Use mild soap when necessary.
• Avoid abrasive cleaners.
• Allow surfaces to dry completely before reconnecting equipment.

Waterproof Tray Cleaning

• Remove standing water.
• Remove soil and plant debris.
• Wipe or rinse the tray.
• Use mild soap where necessary.
• Allow the tray to dry completely.
• Inspect the tray for damage.
• Reinstall it flat against the enclosure floor.

Mylar Care

To help preserve reflectivity:

• Use soft cleaning materials.
• Avoid abrasive pads.
• Avoid stiff brushes.
• Do not use harsh solvents.
• Remove spills quickly.
• Avoid dragging sharp objects against the walls.

Fabric and Zipper Care

• Keep zipper tracks clean.
• Open and close doors smoothly.
• Avoid forcing jammed zippers.
• Keep fabric clear of zipper movement.
• Inspect seams regularly.
• Repair small damage when appropriate using PatchIT.

Frame Inspection

• Inspect Q195 steel poles periodically.
• Confirm polypropylene corners remain secure.
• Check the Space Booster positioning.
• Make sure suspended equipment remains securely mounted.
• Replace damaged structural components before continued use.

Ventilation Maintenance

• Inspect ducting connections.
• Remove accumulated dust.
• Keep intake and exhaust openings unobstructed.
• Clean filters according to their manufacturer’s instructions.
• Check that negative pressure is not excessively reducing interior space.

Storage

• Remove all lighting and ventilation equipment.
• Clean and dry the enclosure completely.
• Remove the Water Tray.
• Disassemble the steel frame carefully.
• Keep poles and connectors together.
• Avoid sharply folding fabric across zippers.
• Protect the reflective Mylar from punctures.
• Store the enclosure in a clean and dry location.
• Use the supplied storage bag for transport and storage when appropriate.

What's Included

• Secret Jardin Dark Street V4 120 Grow Tent
• 190M Tent Fabric
• 95% Reflective Mylar Interior
• 16 mm Q195 Steel Poles
• Reinforced Polypropylene Corners
• Waterproof Water Tray 120
• Space Booster
• WebIT Trellis Net
• 1 Pair StrapIT Filter Straps
• 1 Pair HookIT Lighting Hooks
• 15 CableIT Clips
• 1 PocketIT Adjustable Tool Pouch
• 1 PatchIT Repair Accessory
• DF16 Compatible Ventilation System
• Carrying Bag with Shoulder Strap