In the late fruiting stage of cucumber plants, the characteristics of the season and the productivity of each individual plant play a significant role. During autumn and winter, the fruiting period typically occurs from early March to late April, followed by the winter pod stage from early May to early June, and the late summer fruiting period from mid-June to mid-August. At this stage, the plant's reproductive growth becomes dominant, while vegetative growth gradually weakens. This shift requires careful management to ensure optimal yield and quality.
Guaigua (cucumber) management during this critical phase focuses on maintaining plant vitality, extending the fruiting period, and preventing a decline in both production and quality. The main technical strategies include precise temperature control, effective lighting management, and balanced fertilizer application.
Temperature management is crucial during this time. From early March to mid-May, the greenhouse temperature should be maintained at 16–28°C in the morning, 28–32°C around noon, and 28–24°C in the afternoon. Nighttime temperatures should be kept between 22–18°C and 18–14°C respectively. Due to the short duration of ventilation before and after noon, it's recommended to transition to full-day ventilation. After mid-May, the side vents and roof windows should be fully opened to allow the internal temperature to match the external environment as closely as possible.
Lighting is another essential factor. During this stage, natural light hours are extended, and light intensity is significantly increased. Cucumber plants benefit from sufficient light exposure. To improve light distribution among the plants, it’s important to adjust their positions so that each plant maintains 20–30 functional green leaves, evenly spread out to receive adequate sunlight.
Fertilizer management should focus on frequent but small applications, ensuring both root feeding and foliar spraying are balanced. Watering should occur every 7–8 days, with one top dressing applied per cycle. Fertilizers should be rich in potassium and nitrogen, with quick-release properties. Foliar sprays containing amino acids and trace elements can also be used, ideally at 30–50% of the medium-term fertilizer dosage. This approach helps maintain plant health and supports sustained fruiting throughout the late season.
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