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Overwatering, pathogens, pests, soil chemistry and sun can account for japonica leaves turning yellow. Japanese quince (Chaenomeles japonica) and glossy-leaved paper plant (Fatsia japonica) have yellow leaves when the soil pH (power of hydrogen) impedes intakes of present macro- and micro-nutrients. They also show chlorotic shoots from fungal or viral diseases, heavy droughts or floods, improper light and shade and incorrect irrigation schedules.
Wiki User
∙ 6y ago
Wiki User
∙ 9y agoIf the leaves on your Japonica bush are turning yellow, you might have an issue with lace bugs that are eating the bush. You could also have an issue with the soil pH not being acidic enough.
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What percentage of leaves turn yellow?
52% of leaves turn yellow yes this may be true but you need to state your reference!!
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