How to Make Geraniums Bloom
As a classic variety of flowers for window sills, geraniums are deeply favored by gardening enthusiasts for their colorful and vibrant blooms. However, many hobbyists often encounter the problem of lush plant growth without flowering during maintenance. This article will systematically analyze the secrets to promote flowering and techniques for managing the blooming period.
Ⅰ. Essential Conditions for Geraniums to Bloom
1. Accurate Temperature Control
Geraniums are extremely sensitive to temperature and require a golden range of 15-20°C. When the temperature exceeds 35°C in summer, they should be immediately moved to a north-facing balcony, and the use of a shading net can reduce the leaf surface temperature by 5-8°C. In winter, they should be brought indoors early and maintained in an environment above 10°C through double-glazed windows, with heating pads used for additional insulation during low-temperature periods.
2. Scientific Light Management
In spring and autumn, ensure 6 hours of direct sunlight daily, and in winter, they can be exposed to full sunlight. It is particularly important to note that from 10:00 to 15:00 in summer, a shading net with 30% light reduction should be used to protect the leaves from scorching while maintaining necessary light intensity (recommended to be controlled between 30,000-50,000 lux).
3. Rational Fertilization Plan
During the growing period, apply diluted soybean cake solution (1:800) every 10 days, and switch to potassium dihydrogen phosphate solution (0.2% concentration) for foliar application during the bud formation stage, with bone meal applied in holes to enhance flower bud differentiation. Note that the ratio of nitrogen, phosphorus, and potassium should be controlled at 1:2:1.5 to avoid excessive nitrogen leading to excessive growth.
Ⅱ. Key Points for Geranium Flower Maintenance
1. Water Control Strategy
Use the "wet-dry alternating" method for watering,浇透 once the top 3cm of the substrate dries. It is recommended to use terracotta pots for planting, as their breathability can reduce the risk of root rot by 30%. The recommended air humidity during the flowering period is 40-60%, and dehumidifying equipment should be used during the rainy season in southern regions.
2. Environmental Stability Measures
Maintain a day-night temperature difference within 8°C to avoid sudden temperature fluctuations that lead to bud drop. Use smart temperature control devices to maintain a stable environment, especially avoiding direct air conditioning and keeping the air flow speed below 0.5m/s per hour.
3. Post-Flowering Pruning Techniques
After flowering, promptly remove the faded flowers and the two pairs of leaves below, leaving the complete bud points. Pruning tools need to be disinfected with 75% alcohol, and applying wood ash to the cut can prevent infection. Using Melaleuca通用型 nutrient solution can promote secondary flowering.
By precisely controlling the three key elements of temperature, light, and water-fertilizer, combined with scientific management during the flowering period, geraniums can bloom throughout the year. It is recommended to establish a maintenance log to record daily temperature and humidity and the plant's condition, gradually mastering a personalized care plan.