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Shop greenhouse accessories designed for KLASIKA and BALTIC LT greenhouses Danish-made automatic vent openers, hanging shelves, raised seedbeds, irrigation systems, and seasonal maintenance products. Free UK delivery
The right greenhouse accessories make the difference between a structure that requires daily attention and one that manages itself between a productive growing space and a disappointing one. Every greenhouse accessory in the KLASIKA and BALTIC LT range is designed to work with this specific greenhouse system, ensuring that openers fit correctly, shelving hangs at the right height, and raised seedbed sets fill the internal width precisely. Whether you are setting up a newly assembled greenhouse for the first time or upgrading an existing growing space, the accessories on this page are the ones that make the biggest practical difference.
A sealed greenhouse on a warm spring or summer day can reach 45–50°C within an hour of the sun appearing. At these temperatures, plants do not merely slow down — they wilt, scorch, and suffer permanent damage within a morning. The automatic vent opener is the single greenhouse accessory that prevents this, and it does so without electricity, without wiring, and without any manual intervention.
KLASIKA and BALTIC LT greenhouses use automatic vent openers from Orbesen Teknik ApS — a Danish manufacturer that has specialised in greenhouse ventilation systems for decades. Three models are available:
THERMOVENT — the established model in the range, opening progressively from around 17°C and reaching full opening at approximately 25°C. This temperature response is calibrated precisely for UK growing conditions, where the difference between a cool morning and a warm afternoon can be measured in minutes rather than hours.
VENTOMAX — a more gradual opening profile suited to applications where sensitive seedlings or tender plants benefit from a slower, more controlled increase in ventilation as temperature rises.
UNIVENT — designed for universal application across a wider range of vent geometries, making it suitable where the standard opener fitting requires greater flexibility.
All three operate on the same wax-cylinder principle: no batteries, no electricity, no programming required. The wax expands as temperature rises and pushes the vent open; it contracts as temperature falls and the vent closes. The response is continuous and proportional — the vent opens further as it gets hotter, providing exactly the ventilation the greenhouse needs at any given moment. Fit one opener to every roof vent. The cost is modest; the value is a greenhouse that manages summer temperatures automatically while you are elsewhere.
Hanging greenhouse shelves add a productive staging level above the main growing beds, converting unused air space into a working surface for propagation trays, potted herbs, rooted cuttings, and any plant that does not need the depth of a bed beneath it.
Hanging shelves for KLASIKA and BALTIC LT greenhouses are 45cm wide and available in three lengths: 75cm, 105cm, and 200cm. They attach directly to the greenhouse frame — suspended from the galvanised steel arch sections at whatever height suits the intended use. The strength of a CE-certified steel frame means shelving can be loaded with compost-filled trays, seed modules, and pot plants without any concern about deformation at the fixing point over time. A 200cm shelf run along one end wall of a 3m × 6m greenhouse creates a full-width propagation station at comfortable working height, with beds beneath it for the main growing crops.
For serious propagation — seed starting in January and February, rooting cuttings in late summer — hanging shelves positioned to maximise light exposure under the roof panels give seedlings the best possible start.
Raised seedbed sets transform the growing environment inside a greenhouse from open ground into managed, defined, and productive beds. Available in dimensions matched to the internal widths of the KLASIKA and BALTIC LT range:
For 3m-wide greenhouses (KLASIKA ARCHED, BALTIC LT, KLASIKA TUBE, KLASIKA EASY), the seedbed sets fit the full internal width precisely, sitting on each side of the central path with no gaps and no wasted ground.
For 2.35m and 2.5m-wide greenhouses (KLASIKA HOUSE, KLASIKA BERNARD, STANDART KLASIKA, KLASIKA DROP), equivalent sets fit the narrower internal dimensions with the same precision.
Raised seedbeds warm faster in spring than open ground — soil temperature inside a raised bed can be several degrees ahead of open soil in March and April, which translates directly into earlier germination and faster establishment. Soil stays in the beds and off the path, weeding is reduced, and the defined structure gives the greenhouse interior the organised, purposeful character that makes it a pleasure to work in.
The nursery seedbed with polycarbonate cover (100×93×38cm, 4mm polycarbonate lid) is the standout accessory for year-round growing. Used inside a polycarbonate greenhouse, it creates a double-insulated propagation microclimate — the greenhouse panels hold warmth, the polycarbonate cover holds additional warmth — allowing seeds to germinate in January and February without any electrical heating. The cover lifts for watering and ventilation, then replaces to retain accumulated warmth.
Plant binding sets provide the support infrastructure for training climbing and tall crops — cordon tomatoes, cucumbers, beans, and climbing courgettes — up the greenhouse frame rather than across the beds. Each set is ordered by greenhouse length and provides the appropriate number of horizontal support wires and vertical training attachments to run the full length of your specific model.
The galvanised steel frame in KLASIKA and BALTIC LT greenhouses is specifically strong enough to anchor plant binding systems and carry the sustained weight of trained crop growth — a full season of climbing tomatoes tied to the ridge is a significant load that a steel frame handles without deformation at the fixing point. This makes plant binding sets genuinely practical in a way that is not always possible with lighter frame materials.
Drip irrigation delivers water directly to the root zone of each individual plant through a small-bore nozzle on a supply line running along the bed length. In June and July, when greenhouse tomatoes and cucumbers can require daily or twice-daily watering, a drip system removes this task from your daily routine and ensures consistent moisture levels that uniform fruit development requires. Both mains-connected and gravity-fed configurations are available.
Capillary irrigation uses a permeable mat in contact with the growing medium, delivering water upward by capillary action. This is the system best suited to propagation trays and small pots where maintaining consistent moisture without individual attention is critical for germination and early root development.
Water tanks work with gravity-fed irrigation systems and collect rainwater from greenhouse roof guttering for sustainable irrigation through the growing season. Collected rainwater is softer than mains water in most UK regions, reducing mineral deposit build-up on panels and growing media. Available in multiple capacities and designs.
Additional sunroofs and rear ventilation panels can be added to all KLASIKA models, providing supplementary ventilation above and beyond the standard roof vent configuration. Sunroofs are hinged polycarbonate panels that open outward from the roof, releasing heat from the highest point of the greenhouse — where warm air accumulates first.
For longer greenhouses where a single end door is the only ventilation point when vents are insufficient, a rear door or additional air vent at the far end creates the through-draught that drops internal temperature most effectively. Both rear doors and additional air vent panels are available for every KLASIKA model, sold by greenhouse specification.
Track separations divide the internal floor of the greenhouse into defined growing zones — separating beds from paths, or separating different growing areas within the same structure. Available in regular or U-shaped metal profile, they provide clean, permanent edges to growing beds and keep soil contained within defined areas.
Concentrated greenhouse disinfection solution — broad-spectrum, effective against bacteria, viruses, and fungi. The essential product for the autumn clear-down and spring reopening, removing the disease inoculum that accumulates on frame surfaces and panel faces during the growing season.
Universal concentrated surface cleaner — for external panel cleaning, guttering, frame surfaces, and any surface where organic growth has established. Removes algae, mineral deposits, and surface soiling that reduce light transmission through the panels.
Greenhouse shading solution — applied to the exterior of the polycarbonate panels from late May, reducing solar gain before it enters the greenhouse. Manages summer overheating on the hottest days without permanently affecting light transmission. Washes off cleanly in autumn.
