Riga 5 Black 9x17 Greenhouse | German-Made Four-Season Kit
Riga Black: 9x17
- 1 Top Shelf
- 1 Bottom Shelf
- 20" Intake Shutter Vent
- 16" Exhaust Fan
- Manual Dial Thermostat
- 5 Heavy Duty Seed Trays
- 10 Stainless Steel Hooks
- 10 Heavy Duty Plastic Hooks
- 1 Assembly Facilitation Kit
- 165 sq ft of Growing Area
- 4 Roof Vents
- 1 Rear Wall Window
- Dutch Door
- Keyed Lock
- Front Gable: 6mm Translucent single layer polycarbonate panels
- Rear Gable: 10mm Translucent twin-wall polycarbonate panels
- Sides and Roof: 8mm UV-coated translucent twin-wall polycarbonate panels
Riga 5 (also known as Riga V) Black 9×17 Greenhouse — German-Engineered, Four-Season Growing
The Riga 5 Black is a 165 sq ft, four-season greenhouse engineered and manufactured in Germany by Exaco — a company with 28 years of greenhouse manufacturing experience. Built for serious gardeners and year-round growers who demand maximum growing space, European craftsmanship, and a refined aesthetic.
The Black Series adds a black powder-coated aluminum frame, 6mm crystal-clear single-layer polycarbonate front, and Victorian cast metal roof cresting — delivering striking European aesthetics without compromising structural performance. Rated to 100 mph winds, backed by a 15-year frame warranty, and ships in 12–16 weeks.
What's Included — Basic Package
- 6mm crystal-clear single-layer polycarbonate — front gable and door
- 8mm UV-coated translucent twin-wall polycarbonate — sides and roof
- 10mm translucent twin-wall polycarbonate — rear gable (added strength)
- 4 roof vents (22" × 40" each) with automatic openers
- 1 rear wall window (3'5" × 2'1")
- Split dutch hinged door with keyed lock
- First-class insulation — R/K-value up to 1.89
- 15-year warranty on aluminum frame
- 10-year pro-rated warranty on polycarbonate panels
Riga V Black vs. Riga IV Black — Key Differences
| Feature | Riga V Black (this model) | Riga IV Black |
|---|---|---|
| Length | 17'6" | 14' |
| Growing Area | 165 sq ft | 135 sq ft |
| Roof Windows | 2+ (with auto openers) | 2 (with auto openers) |
| Best For | Maximum growing space; multi-zone growing; serious gardeners | Balance of space and footprint |
Full Riga Series Comparison
| Model | Width | Length | Height | Area | Roof Windows |
|---|---|---|---|---|---|
| Riga IIs | 7'4" | 7' | 7' | ~48 sq ft | 1 |
| Riga IIIs | 7'8" | 10'6" | 7'1" | 81 sq ft | 1 |
| Riga III | 9'8" | 10'6" | 7'7" | 102 sq ft | 1 |
| Riga IVs | 9'8" | 13'10" | 7'7" | ~130 sq ft | 2 |
| Riga IV Black | 9'8" | 14' | 7'7" | 135 sq ft | 2 |
| Riga V Black (this model) | 9'8" | 17'6" | 7'7" | 165 sq ft | 2+ |
| Riga XL series | 9'8" | Up to 30'+ | 7'7" | Up to 300+ sq ft | Multiple |
Frequently Asked Questions
What is the Riga V Black greenhouse?
The Riga V Black is a 165 sq ft, four-season polycarbonate greenhouse manufactured in Germany by Exaco. It features a black powder-coated aluminum frame, crystal-clear 6mm polycarbonate front, and 8mm/10mm twin-wall polycarbonate sides and rear panels. Rated to 100 mph winds with automatic roof vents for year-round climate control.
How does the Riga V Black differ from the Riga IV Black?
The Riga V Black adds 3'6" of length and 30 sq ft of growing area over the Riga IV Black, making it the largest standard Riga model before the XL series. Both share the same 9'8" width and 7'7" peak height and the same Black Series aesthetic.
Do I need the base kit (foundation frame)?
The base kit is strongly recommended for soil or lawn installations. It anchors the greenhouse and adds interior height. For existing concrete pads, the anchor option (+$99.99) is often more appropriate.
Can the Riga V Black handle heavy snow loads?
Yes. The "onion" arch profile sheds snow automatically and the structure is tested to 100 mph winds. When properly anchored, the Riga V Black excels in cold-climate, four-season use.
How long does assembly take?
Approximately one to two days for two people. Written instructions are included. The Riga assembly facilitation kit (metric tape, 10mm wrenches, ratchet straps, Boss 399 silicone caulk, window restraint cables) is available separately.
Is the Riga V Black expandable?
No — the Riga V Black is a fixed-length model. If future expansion is a priority, consider the Riga XL series, which accepts additional sections.
What polycarbonate thicknesses does the Riga V Black use?
Three thicknesses: 6mm crystal-clear single-layer (front and door) for maximum light; 8mm UV-coated twin-wall (sides and roof) for insulation; 10mm twin-wall (rear gable) for added structural strength.
Is the Riga V Black suitable for year-round growing in cold climates?
Yes. Twin-wall polycarbonate provides an R/K-value of up to 1.89, and the arch profile prevents snow accumulation. Engineered for four-season performance in regions with heavy snowfall and sub-zero temperatures.
What is included in the Premium Upgrade option?
The Premium Upgrade enhances the standard kit with additional materials or fixtures. Select "Add Premium Upgrade" above to include it with your order.
| Height | 7'7" |
| Width | 9'8" |
| Length | 17'16" |
| Growing Area | 165 sq ft |
| Frame | Powder Coated Aluminum |
| Frame Color | Black |
| Door Type | Dutch Door |
| Latch | Keyed Lock |
| Door Dimension | 30"W x 79"H |
| Front Glazing Type | Translucent single layer polycarbonate panels |
| Front Glazing Thickness | 6mm |
| Rear Glazing Type | Translucent twin-wall polycarbonate panels |
| Rear Glazing Thickness | 10mm |
| Sides & Roof Glazing Type | UV-coated translucent twin-wall polycarbonate panels |
| Sides & Roof Glazing Thickness | 8mm |
| Extendable | No |
| Snow Rating | Yes - onion arch profile prevents snow accumulation |
| Wind Rating | Tested to 100 mph |