Dark Room DR300 Grow Tent – Secret Jardin · 300x300x217cm Professional Indoor

Ready to play in the big leagues? The Dark Room DR300 Grow Tent by Secret Jardin isn't just a tent; it’s a massive 9m² production facility designed for growers who demand professional results, maximum control, and zero excuses. If you are looking to scale up your operation with a structure that withstands the weight of heavy equipment and optimizes every lumen of light, this is the definitive upgrade your indoor garden needs.

Why upgrading to a pro tent is non-negotiable

Problem: We've all been there—trying to save a few bucks on a generic, flimsy tent. The result? Zippers that jam or break mid-flower, poles that bow under the weight of a good carbon filter, and the worst nightmare of all: light leaks that stress your plants and ruin the photoperiod.

Agitation: Imagine walking into your grow room and finding your structure sagging, or worse, discovering hermaphroditic plants because cheap stitching let light in during the dark cycle. That’s months of work, electricity, and expensive nutrients thrown down the drain because the foundation of your grow wasn't up to the task. Cheap gear is the most expensive mistake you can make.

Solution: The Dark Room DR300 eliminates these risks entirely. Built by Secret Jardin, the leaders in grow architecture, this tent offers a fortress-like environment. It’s light-tight, structurally sound, and engineered to turn your basement or spare room into a high-performance botanical laboratory.

Quick spec sheet of the Dark Room DR300

• Brand: Secret Jardin (Dark Room V3.0 Series).
• Dimensions: 297cm (width) x 297cm (depth) x 217cm (height).
• Grow Area: Approx. 9m².
• Structure: Q195 steel tubes, Ø 19mm diameter.
• Fabric: Mylar 210D with high coefficient of reflection (95%).
• Weight Capacity: Supports up to 150 kg of equipment (lighting, extraction, filters).
• Included Accessories: Space Booster (prevents walls from sucking in), WebIT (scrog net), CableIT, HookIT, StrapIT, PocketIT.

Key advantages over basic options

When you step up to a tent of this size, stability is everything. Unlike budget tents that wobble when you touch them, the DR300 is built like a tank, designed to house heavy-duty Grow lights without breaking a sweat.

• Unmatched Stability: The 19mm steel poles and reinforced corners mean you can hang heavy carbon filters and multiple reflectors without the roof bowing.
• Space Booster System: This is a game-changer. It keeps the tent walls taut, preventing them from sucking inward when your extraction is running at full power, ensuring you don't lose valuable growing volume.
• Total Light Control: The Mylar 210D fabric offers 95% reflection, bouncing light back to your plants from every angle, while the zippers and double flaps ensure the interior remains 100% light-proof.
• Modular Ventilation: With multiple extraction and intake socks, you can configure your Air Extraction System exactly how you want it, avoiding awkward ducting bends that reduce efficiency.

Real benefits you’re going to notice

First, you’ll feel the peace of mind. Knowing your environment is sealed and secure allows you to focus on the plants, not on patching up equipment. The sheer size (nearly 3x3 meters) gives you room to work inside the tent comfortably, making watering, pruning, and checking for pests a breeze rather than a contortionist act.

Second, your yields will improve. The superior reflectivity of the Mylar 210D means your plants absorb more energy, leading to denser, heavier buds. Plus, the ability to maintain a stable climate without air leaks means your temperature and humidity controllers work more efficiently, saving you money on electricity.

Step-by-step assembly guide

1. Clear the Area: Ensure you have a clean space slightly larger than 3x3m. Lay out all the tubes and connectors.
2. Build the Frame: Assemble the bottom rectangle first, then the vertical poles, and finally the roof structure. Make sure all connectors are fully seated (you'll hear a click).
3. Unfold the Canvas: Open all zippers completely. Slide the bottom of the canvas under the frame.
4. Cover the Frame: Carefully pull the canvas up and over the top structure. This is easier with two people given the height (217cm).
5. Install the Space Booster: Clip the Space Booster bars horizontally along the sides to keep the walls rigid.
6. Add the Water Tray: Place the waterproof liner at the bottom and secure it to the poles.
7. Equip It: Hang your lights, install your extraction, and place your Grow Trays or pots. You are ready to grow!

Frequently Asked Questions

How many lights do I need for the DR300?

For optimal coverage in this 9m² space, we recommend using four 600W HPS fixtures or, for better efficiency and heat management, four 600W-1000W LED fixtures.

What size extractor fan should I use?

Given the large volume (approx. 19m³), you need a powerful extractor. Look for a model capable of moving at least 1000-1500 m³/h to ensure proper air exchange and temperature control.

Is the floor waterproof?

Yes, the DR300 comes with a removable, waterproof Mylar water tray liner that protects your room's floor from spills and runoff.

Can I assemble it alone?

While it is possible, due to the 217cm height and heavy-duty canvas, we strongly recommend having a friend help you pull the canvas over the frame to avoid frustration.

Personal Experience of Pevgrow’s CEO (Alan)

"I've set up dozens of tents in my life, and the jump to a DR300 is significant. It's not just a tent; it's a room within a room. What I love most about this Secret Jardin model is the Space Booster. In cheaper large tents, the negative pressure from the extractor sucks the walls in, stealing 20% of your canopy space. With the DR300, the walls stay flat, and my side branches get the light and air they need. If you have the space for it, this is the best investment for a semi-commercial or high-yield personal setup. Just make sure you measure your room twice before ordering—it's huge!"