--- title: "Greenhouse Eggplant" description: "Greenhouse eggplant is a long-cycle fruiting vegetable grown for a heavy fruit whose skin decides the grade. Reference values with their Dutch sources, and what the crop asks of a greenhouse." canonical: "https://dutchgreenhouses.com/crops/eggplant/greenhouse-eggplant" locale: "en" updated: "2026-08-11" --- # Greenhouse Eggplant > Part of: [Eggplant](/crops/eggplant.md) · Provider: [DutchGreenhouses](/) Greenhouse eggplant is a long-cycle high-wire crop grown on rockwool with recirculating drip irrigation, carrying a heavy individual fruit whose glossy skin decides the grade. The plant is grafted onto a vigorous rootstock as standard, because the root system is coarse relative to the fruit load it carries across the cycle. Eggplant # Greenhouse eggplant. A heavy fruit on a coarse root system, grafted as standard. Greenhouse eggplant is a long-cycle fruiting vegetable grown for a heavy individual fruit with a glossy skin, where surface blemishes decide the grade. It occupies less Dutch glasshouse area than tomato or pepper, which makes it attractive to growers looking for a crop with less crowded competition, and it fits a house already set up for high-wire production. ## What the crop needs The crop is grown on rockwool with drip irrigation and drain recirculation. Its root system is coarse relative to the fruit load it carries, so water availability does more of the work of holding quality than it does on tomato, and an interruption while fruit is filling shows on the skin. Grafting onto a vigorous rootstock is standard practice for exactly this reason. ## What the greenhouse has to do Eggplant carries a heavy fruit on a plant that is grafted as standard, and the house is specified around both. The crop wire and the structure take a real load for a long cycle, and grafting exists because the root system on its own does not reliably carry it — which makes root-zone control, and the irrigation capacity behind it, central rather than supporting. Skin quality is what the grade turns on, and skin is easily marked. The fruit bruises against structure, against wires and against handling, so row layout, path width and the harvest route are drawn for a fruit that shows every contact. Climate work concentrates on avoiding the swings that leave the surface dull, which is a screening and ventilation question more than a heating one. DutchGreenhouses® specifies the structure, climate, screening and irrigation around the eggplant crop, its rootstock and the local climate, so a heavy fruit load is carried without losing skin quality. Get in touch to plan an eggplant greenhouse. ## Crop data Greenhouse eggplant ### Day climate1 Air temperature 22.7–22.7 °C Sources (1) - WUR / Delphy, 2025, WPR-1510 — Modern unlit high-wire eggplant under low-emissivity glass E076 Reference values, not a specification. Setpoints are calculated per greenhouse, crop and location. Related ## The systems behind the crop ### Hydroponics Substrate growing with drip supply and drain recirculation. ### Climate Heating, cooling, humidity control and carbon dioxide dosing. ### Grow lights Supplemental light for the low-light months. ### Performance and yield What drives greenhouse output, and how it is planned. ## Skin decides it, and skin travels badly Greenhouse eggplant is sold on its skin. A dark, unmarked, glossy surface is the grade, and the nutrition on the plate is not what a buyer is choosing between. Everything about the journey works against the skin: it bruises against structure, against crates and against other fruit, and a mark that shows up days after packing was made at a moment nobody recorded. Distance multiplies the handling. Each extra transfer, each day of vibration and each warm hour adds another chance for the surface to dull or the flesh to soften under it. The fruit is not spoiled. It simply drops a grade, and the loss lands on whoever is holding it at the end. Growing close to the market removes most of that handling rather than managing it. Fewer transfers, fewer days and delivery inside the same week keep the fruit in the state it left the plant in. A long-cycle crop under glass supplies at that standard continuously, which is what a buyer specifying eggplant is actually buying: the same fruit, in the same condition, every week of the year. ### Nutrition facts Eggplant, raw Per 100 g Energy 25 kcal Fat 0.18 g Carbohydrate 5.88 g Sugars 3.53 g Fiber 3 g Protein 0.98 g Sodium 2 mg Potassium 229 mg Vitamin C 2.2 mg Source: USDA FoodData Central, FDC 169228 Questions ## Greenhouse eggplant, asked and answered Why is eggplant grafted? For root vigour and resilience. The crop carries a heavy fruit load over a long cycle, and the rootstock is what reliably supports it. What decides eggplant grade? Skin. The fruit marks easily against structure, wires and handling, so row layout, path width and the harvest route matter as much as the climate does. Does lighting change the design? It changes the heating load, the electrical service and the screening strategy at the same time, so it belongs in the brief rather than in a later upgrade. 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