Ronen,
Not certain but believe it is some kind of sun damage.
The leaves are very green with black spots like a plant that was moved from a shady area into full sun (Sunlight should be increased slowly not all at once.) If a plant is watered in mid day sometimes the water acts like a magnifying glass and burns the leaves - the same thing can happon with insecticidal oils in full sun. Am well aware of the intensity of the sun in your country - my work took me there at one time and I lived in Hertzlea - it is ever more intense in other parts of the country. What part do you live in?
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sick cymbidium
Linear Mode
