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Hydrangea Care and Management Methods and Precautions Explained in Detail

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Fertilizing: Hydrangeas love fertilizer, generally apply organic fertilizer once every half month. In the early growth stage, use more nitrogen fertilizer; during flower bud differentiation and bud formation, use more phosphorus and potassium fertilizer. You can also spray 0.1% to 0.2% monopotassium phosphate on the leaves 2 to 3 times, and stop fertilizing after the buds show color. Watering: Hydrangea leaves transpire heavily, so you must water promptly. Even brief drought-induced wilting can cause dry leaf edges and dead flowers. Especially in summer, you must shade and cool the plant to reduce transpiration and maintain air humidity above 60%. In addition, hy

Fertilizing: Hydrangeas love fertilizer, generally apply organic fertilizer once every half month. In the early growth stage, use more nitrogen fertilizer; during flower bud differentiation and bud formation, use more phosphorus and potassium fertilizer. You can also spray 0.1% to 0.2% monopotassium phosphate on the leaves 2 to 3 times, and stop fertilizing after the buds show color.

Watering: Hydrangea leaves transpire heavily, so you must water promptly. Even brief drought-induced wilting can cause dry leaf edges and dead flowers. Especially in summer, you must shade and cool the plant to reduce transpiration and maintain air humidity above 60%. In addition, hydrangea flower color is affected by soil pH, usually blue in acidic conditions and red in alkaline conditions. Therefore, determine the water pH according to the flower color you want.

Temperature: Hydrangeas cannot tolerate high temperatures and require temperatures between 15°C and 25°C. High temperatures will make the plant shorter and the flower color paler, reducing quality. After the buds show color, keep the temperature at 10°C to 12°C to improve flower color and help preserve freshness.

Light: Hydrangeas are shade-tolerant; direct sunlight can cause sunscald, so shading is needed. Usually, 60% shading is required during the growing period, and after the flower clusters show color, appropriate shading is also needed to prevent the flower color from fading and losing its luster.

Pruning: Hydrangeas have strong sprouting ability, and many vegetative branches will sprout from the base of the plant. To reduce nutrient loss, remove them promptly. If old branches need to be replaced, choose robust vegetative branches as reserve branches. After flowering, cut back promptly, retaining 2 to 3 robust buds to promote new branches.

To make hydrangeas bloom during the Spring Festival, choose robust 3- to 5-year-old plants, treat them at a low temperature of 2°C to 4°C for 14 days, then move them into a greenhouse to heat, keeping them at 10°C to 20°C; they can bloom in 50 to 60 days. Note to ventilate frequently, maintain good light conditions and relatively high air humidity, and apply an organic liquid fertilizer once every half month until flowering.

Hydrangeas have few pests, mostly aphids, spider mites, and the like. While ensuring good ventilation, spray systemic pesticides to control them. Common diseases are mostly leaf diseases, such as white rot, gray mold, and leaf spot. Therefore, spray pesticides regularly for prevention. After symptoms are found, spray pesticides promptly, and severely diseased leaves can be removed and burned.

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