What Causes the Blotches on Hydrangeas
Let's talk about the topic of why hydrangeas develop blotches, and the editor will introduce the following.
What Causes the Blotches on Hydrangeas
1. Excessive Sun Exposure: Hydrangeas develop sunburn spots on their leaves under intense or prolonged sunlight. 2. Overwatering: Overwatering hydrangeas can lead to root rot. 3. Fertilizer Burn: Excessive fertilizer application or high concentration can cause fertilizer burn. 4. Disease Infection: Poor ventilation or improper care can lead to leaf spot disease in hydrangeas.
1. -- Sunburn --
Hydrangeas are short-day plants. Under intense or prolonged sunlight, it can hinder the normal growth of the plant and cause sunburn spots on the leaves. At this point, the plant should be moved to a cool, well-ventilated area to prevent further exposure to sunlight.
2. -- Overwatering --
Too much water for hydrangeas can lead to root rot, affecting nutrient absorption in the leaves and causing blotches and yellowing. At this point, the old and withered leaves at the base of the plant should be cut off, placed in a well-ventilated area to dry out the excess water, and water intake should be strictly controlled in the later stages.
3. -- Fertilizer Burn --
When fertilizing hydrangeas, excessive amounts or high concentrations can cause fertilizer burn, leading to spots on the leaves. At this point, water the plant's roots to wash away the excess fertilizer and reduce its concentration to ensure the healthy growth of hydrangeas.
4. -- Disease Infection --
Poor ventilation or improper care can cause leaf spot disease in hydrangeas. This disease primarily affects the plant's leaves, causing small green spots to appear on the leaves, which gradually become larger over time and can even infect the entire plant.
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