Causes of Flower and Fruit Drop in Greenhouse Peppers and Control Measures

Causes of flower and fruit drop in greenhouse peppers: 1. Nutritional deficiency: Poor cultivation and management practices, such as excessive planting density or overapplication of nitrogen fertilizer, can lead to this issue. Excessive nitrogen promotes a shift from reproductive to vegetative growth, resulting in inadequate nutrition for flowers and fruits and making them prone to dropping. 2. Environmental conditions: In winter and spring, insufficient light and low temperatures (below 15°C) within greenhouses can hinder pollination; even when pollination occurs, fruit development is poor and fruits are easily shed, a problem that becomes more pronounced during cloudy and rainy weather. In late spring, early summer, and early autumn, high temperatures exceeding 35°C often occur inside greenhouses, which may cause incomplete floral organ development or drying of the stigma, preventing successful pollination and leading to flower drop.

Common Misconceptions in Greenhouse Pepper Cultivation and Their Solutions

Greenhouse-grown peppers can bring substantial profits to farmers, which is why they are widely cultivated. Today, we’ll share some key points on greenhouse pepper cultivation and management, as well as common pitfalls to avoid. Pitfall #1: More fertilizer means better growth. In fact, for normal pepper development, the soil’s total salt concentration should ideally be between 2,000 and 3,000 mg/kg. If it exceeds 6,500 mg/kg, the roots may suffer reverse osmosis, leading to dehydration and eventual wilting, inevitably reducing yield. Inside greenhouses, high temperatures and humidity accelerate organic fertilizer decomposition; phosphorus utilization is 2–3 times higher than in open fields, while nitrogen losses through volatilization are significant. Over-fertilization can easily result in fertilizer damage. Solution: ① After planting for 3…

Chili Cultivation Techniques and Precautions

Key points of greenhouse pepper cultivation: 1. Seedling Raising: Flower bud differentiation in the lower and middle parts of the pepper plant is completed during the seedling stage; therefore, cultivating robust seedlings is crucial for ensuring high-quality flower bud formation and promoting early flowering and fruiting. Under suitable temperature conditions, seedlings are typically ready for transplanting around 35 days old—when flower buds have formed but have not yet opened—usually with 9 to 13 true leaves. Seedlings that are too young may delay flowering and fruit set. 2. Land Preparation, Fertilization, and Transplanting: Peppers thrive on potassium and phosphate fertilizers. Phosphate fertilizer should be applied in a single application along with well‑decomposed organic matter, while potassium fertilizer should be applied generously. Excessive nitrogen application results in large, tender leaves and stems, leading to excessive vegetative growth, which negatively affects flowering, fruit set, and later development. Additionally, it can cause darker green fruit coloration and slower fruit enlargement. In winter‑heated greenhouses, planting is best carried out in September.