Roses are hardy, diverse in color, and bloom throughout the year, beloved by many flower enthusiasts. However, during the summer, it's essential to pay close attention to the management of rose flowers. Let's learn and understand the key points of managing rose flowers in summer together.
Summer Management Methods for Rose Flowers
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Pruning: After roses bloom, cut them below the third leaf below the withered flower to promote vigorous new branches and early bud formation. Weak and short branches should be pruned first, while strong branches should be pruned later to promote balanced growth. Avoid cutting off more than half the length of long branches to prevent delayed axillary bud sprouting. Additionally, avoid leaving too many flowers per season, as it can lead to smaller flowers and affect the next season's blooms. For potted roses, 3-5 flowers per plant are suitable.
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Fertilization and Watering: During summer, roses grow rapidly, requiring ample nutrients and water to maintain vigorous growth. Apply fermented bean cake or diluted poultry manure every 10 days during the flowering period to promote lush foliage and break the summer dormancy of roses. Potted roses have limited soil, prone to drying out quickly in hot weather, so increase watering frequency, ideally spraying water in the morning and afternoon to create a moist environment and promote leaf and flower growth.
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Shading: Roses thrive best at an average temperature of 20-25°C. When temperatures exceed 33°C, roses enter a semi-dormant state. Therefore, it's best to move potted roses to shaded or ventilated areas under trees or pergolas from 8 am to 4 pm during summer, receiving diffused light to create an optimal environment for growth and flowering.
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Loosening Soil and Weed Control: Use a fine iron rake to loosen the soil, remove weeds, and aerate the potting soil to enhance ventilation and promote normal root growth.
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Disease Prevention and Pest Control: The rainy season in July and August is a high-risk period for various diseases. Spray 15% slaked lime water, mancozeb, or potassium permanganate solution regularly to prevent fungal diseases. For leaf spot disease, spray 50% wettable powder of mancozeb at 500-1000 times dilution. For powdery mildew, use 600 times dilution of sulfur or 400 times dilution of carbendazim. Apply once a week for 2-3 consecutive weeks. Prune off branches immediately upon discovering larvae of borers. Spray insecticides promptly upon detecting leaf-eating pests. In conclusion, although roses are relatively drought-tolerant, it's crucial not to expose them to direct sunlight every day during summer. Providing adequate shading is essential.
