{"product_id":"holkartherm-riga-black-greenhouse","title":"Hoklartherm | Riga Black Greenhouse","description":"\u003cdiv class=\"pg-product-page\"\u003e\n\u003cp\u003eThe Riga Black Greenhouse brings the proven strength of the German-made Riga line into a more refined, architectural profile. With its black powder-coated aluminum frame, elegant Victorian-style roof cresting, clear front panels, and insulated twin-wall polycarbonate body, it offers a strong balance of beauty, protection, and year-round growing performance.\u003c\/p\u003e\n\u003cp\u003eThis greenhouse is ideal for gardeners who want more than a basic backyard kit. The curved roof and sidewall design help shed snow and deflect wind, while the insulated polycarbonate glazing helps create a more stable growing environment through changing seasons. The clear plexiglass front adds visibility and a more open feeling at the entrance, giving the Riga Black a distinctive look compared to standard polycarbonate greenhouses.\u003c\/p\u003e\n\u003cp\u003eChoose the Riga Black if you want a serious four-season greenhouse with German engineering, stronger insulation than glass, and a more polished visual presence than a typical utility greenhouse.\u003c\/p\u003e\n\u003ch6\u003eKEY FEATURES\u003c\/h6\u003e\n\u003cdiv class=\"pg-feature-grid\"\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eGerman-made Hoklartherm construction:\u003c\/strong\u003e Designed and manufactured in Germany by the maker of the Riga greenhouse line.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eBlack powder-coated aluminum frame:\u003c\/strong\u003e 13-gauge aluminum extrusions provide strength, corrosion resistance, and a refined modern look.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eCurved sidewall and roof profile:\u003c\/strong\u003e Rounded shape helps shed snow, deflect wind, and improve structural performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eInsulated twin-wall polycarbonate:\u003c\/strong\u003e 8mm twin-wall polycarbonate side walls and 10mm twin-wall polycarbonate gable ends help improve insulation and durability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eClear plexiglass front:\u003c\/strong\u003e Adds visibility, light, and a more open architectural appearance at the entrance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003e2 roof vents with automatic openers:\u003c\/strong\u003e Roof windows open and close based on temperature to help release heat without constant manual adjustment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eLarge rear wall window:\u003c\/strong\u003e Adds important cross-ventilation from the back of the greenhouse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eBarn-style Dutch door with lock:\u003c\/strong\u003e Split door improves access and airflow while the lock helps keep the greenhouse secure when not in use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pg-feature-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eVictorian cast metal cresting:\u003c\/strong\u003e Decorative roof finials add a finished European greenhouse look.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch6\u003eDIMENSIONS\/SPECIFICATIONS\u003c\/h6\u003e\n\u003cp\u003eThe Riga Black is available in two sizes, Riga 4 Black and Riga 5 Black. Both models share the same 9ft 8in width, 7ft 7in peak height, black powder-coated aluminum frame, insulated polycarbonate glazing, barn-style door with lock, 2 roof vents with automatic openers, and 1 rear wall window.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;\"\u003e\n\u003cdiv style=\"background-color: #f4f8f2; padding: 20px; width: 400px;\"\u003e\n\u003ch2\u003eRiga 4 Black - 14ft Length\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFRAME\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrame Material: \u003c\/strong\u003e13-gauge powder-coated aluminum extrusions\u003cbr\u003e\u003cstrong\u003eFrame Color: \u003c\/strong\u003eBlack\u003cbr\u003e\u003cstrong\u003eDesign: \u003c\/strong\u003eCurved sidewalls with Victorian cast metal roof cresting\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDIMENSIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWidth: \u003c\/strong\u003e9ft 8in\u003cbr\u003e\u003cstrong\u003eLength: \u003c\/strong\u003e14ft\u003cbr\u003e\u003cstrong\u003ePeak Height: \u003c\/strong\u003e7ft 7in\u003cbr\u003e\u003cstrong\u003eGrowing Area: \u003c\/strong\u003e135 sq. ft.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGLAZING\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSide Walls: \u003c\/strong\u003e8mm twin-wall polycarbonate\u003cbr\u003e\u003cstrong\u003eGable Ends: \u003c\/strong\u003e10mm twin-wall polycarbonate\u003cbr\u003e\u003cstrong\u003eFront Panels: \u003c\/strong\u003eClear plexiglass\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color: #f4f8f2; padding: 20px; width: 400px;\"\u003e\n\u003ch2\u003eRiga 5 Black - 17ft 6in Length\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFRAME\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrame Material: \u003c\/strong\u003e13-gauge powder-coated aluminum extrusions\u003cbr\u003e\u003cstrong\u003eFrame Color: \u003c\/strong\u003eBlack\u003cbr\u003e\u003cstrong\u003eDesign: \u003c\/strong\u003eCurved sidewalls with Victorian cast metal roof cresting\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDIMENSIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWidth: \u003c\/strong\u003e9ft 8in\u003cbr\u003e\u003cstrong\u003eLength: \u003c\/strong\u003e17ft 6in\u003cbr\u003e\u003cstrong\u003ePeak Height: \u003c\/strong\u003e7ft 7in\u003cbr\u003e\u003cstrong\u003eGrowing Area: \u003c\/strong\u003e165 sq. ft.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGLAZING\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSide Walls: \u003c\/strong\u003e8mm twin-wall polycarbonate\u003cbr\u003e\u003cstrong\u003eGable Ends: \u003c\/strong\u003e10mm twin-wall polycarbonate\u003cbr\u003e\u003cstrong\u003eFront Panels: \u003c\/strong\u003eClear plexiglass\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch6\u003eWHAT'S INCLUDED\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eBlack powder-coated aluminum frame\u003c\/li\u003e\n\u003cli\u003e8mm twin-wall polycarbonate side walls\u003c\/li\u003e\n\u003cli\u003e10mm twin-wall polycarbonate gable ends\u003c\/li\u003e\n\u003cli\u003eClear plexiglass front panels\u003c\/li\u003e\n\u003cli\u003eVictorian cast metal roof cresting and finials\u003c\/li\u003e\n\u003cli\u003eBarn-style hinged Dutch door with lock\u003c\/li\u003e\n\u003cli\u003eDoor size: 2ft 6in W x 6ft 7in H\u003c\/li\u003e\n\u003cli\u003e2 roof vents with automatic openers\u003c\/li\u003e\n\u003cli\u003eRoof vent opening size: 22in x 40in\u003c\/li\u003e\n\u003cli\u003e1 rear wall window: 3ft 5in x 2ft 1in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eMAINTENANCE AND CARE\u003c\/h6\u003e\n\u003cdiv class=\"pg-card\"\u003e\n\u003cul\u003e\n\u003cli\u003eClean polycarbonate and plexiglass panels with mild soap, water, and a soft cloth.\u003c\/li\u003e\n\u003cli\u003eAvoid abrasive pads, harsh chemicals, or pressure washing directly against panels and seals.\u003c\/li\u003e\n\u003cli\u003eKeep roof vents, rear window, door hardware, and automatic openers free of debris.\u003c\/li\u003e\n\u003cli\u003eInspect the door lock, fasteners, anchors, and vent openers periodically.\u003c\/li\u003e\n\u003cli\u003eRemove excessive snow accumulation if conditions exceed normal design expectations.\u003c\/li\u003e\n\u003cli\u003eMaintain good airflow during warm weather to reduce heat buildup and plant stress.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch6\u003eOPTIONAL ACCESSORIES\u003c\/h6\u003e\n\u003cdiv class=\"pg-card\"\u003e\n\u003cp\u003eOptional Riga-compatible accessories may include shelving, staging, shade cloth, foundation kits, extra ventilation components, and other growing accessories. Availability may vary by model and supplier.\u003c\/p\u003e\n\u003cp\u003eFor many buyers, the most important upgrades to consider are a proper foundation\/base solution, shelving or staging for growing efficiency, and shading or ventilation accessories for warm climates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003ePolycarbonate: 15 Year Limited Warranty (prorated after 5 years)\u003c\/li\u003e\n\u003cli\u003eFrame: 15\u003cspan\u003e Year Limited Warranty\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca title=\"Hoklartherm RIGA Greenhouse Warranty\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0097\/9959\/8140\/files\/2022-RIGA-greenhouse-warranty-_originated-Jan-2017.pdf\" target=\"_blank\"\u003e\u003cimg width=\"200\" style=\"border: 1px solid #bdbdbd;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0097\/9959\/8140\/files\/RIGA_Greenhouse_Warranty_Cover.jpg\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch6\u003eMANUFACTURER INFO AND UNIQUE SELLING POSITION\u003c\/h6\u003e\n\u003cdiv class=\"pg-card\"\u003e\n\u003cp\u003eThe Riga Black is manufactured by Hoklartherm in Germany and distributed by Exaco in the United States. Hoklartherm has been manufacturing high-quality greenhouses in Germany for over 40 years, and the Riga line is known for its curved profile, insulated polycarbonate construction, and strong four-season performance.\u003c\/p\u003e\n\u003cp\u003eWhat makes the Riga Black stand out is its combination of practical greenhouse performance and refined European styling. It keeps the strength and insulation of the standard Riga line, then adds a black powder-coated frame, clear plexiglass front, and decorative Victorian cresting. For growers who want a serious polycarbonate greenhouse that also looks polished in the landscape, Riga Black is a distinctive choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch6\u003eFREQUENTLY ASKED QUESTIONS\u003c\/h6\u003e\n\u003cdetails class=\"pg-faq-item\"\u003e\n\u003csummary\u003eWhere is the Riga Black greenhouse made?\u003c\/summary\u003e\n\u003cdiv class=\"pg-faq-answer\"\u003e\n\u003cp\u003eThe Riga greenhouse line is made by Hoklartherm in Apen, Germany. Hoklartherm has manufactured high-quality greenhouses in Germany for over 40 years. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pg-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Riga Black and the standard Riga greenhouse?\u003c\/summary\u003e\n\u003cdiv class=\"pg-faq-answer\"\u003e\n\u003cp\u003eRiga Black uses the same strength and insulation concept as the standard Riga line, but adds a black powder-coated frame, clear plexiglass front, and Victorian cast metal roof cresting for a more refined appearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pg-faq-item\"\u003e\n\u003csummary\u003eWhat glazing does Riga Black use?\u003c\/summary\u003e\n\u003cdiv class=\"pg-faq-answer\"\u003e\n\u003cp\u003eRiga Black uses 8mm twin-wall polycarbonate side walls, 10mm twin-wall polycarbonate gable ends, and a clear plexiglass front.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pg-faq-item\"\u003e\n\u003csummary\u003eDoes the Riga Black include automatic vent openers?\u003c\/summary\u003e\n\u003cdiv class=\"pg-faq-answer\"\u003e\n\u003cp\u003eYes. Riga Black includes 2 roof vents with automatic openers, along with 1 large rear wall window for additional ventilation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pg-faq-item\"\u003e\n\u003csummary\u003eDo I need a permit for this greenhouse?\u003c\/summary\u003e\n\u003cdiv class=\"pg-faq-answer\"\u003e\n\u003cp\u003ePermit requirements vary by local municipality. Customers should check local rules before ordering, especially if the greenhouse size, location, foundation, or local wind and snow requirements may affect approval.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pg-faq-item\"\u003e\n\u003csummary\u003eWhat foundation is recommended?\u003c\/summary\u003e\n\u003cdiv class=\"pg-faq-answer\"\u003e\n\u003cp\u003eThe site must be level and the greenhouse must be securely anchored. Exaco notes that customers may use a concrete strip foundation, a compatible foundation\/base frame kit, or in some cases a full concrete slab with proper drainage planning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e","brand":"Hoklartherm","offers":[{"title":"9ft 8in x 14ft","offer_id":47337747251349,"sku":"RIGA-4-B","price":9349.0,"currency_code":"USD","in_stock":true},{"title":"9ft 8in x 17ft 6in","offer_id":47337747284117,"sku":"RIGA-5-B","price":11049.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0097\/9959\/8140\/files\/Riga-black.jpg?v=1778171441","url":"https:\/\/mygreenhousestore.com\/products\/holkartherm-riga-black-greenhouse","provider":"MyGreenhouseStore.com","version":"1.0","type":"link"}