Answer: Fuchsia's are sensitive to the standard insecticidal soap spray so you need to throughly drench the upper and lower sides of the leaves, allow it to sit about 10 minutes and then wash it off with fresh water. Any residue left can burn the leaves. You'll need to make repeat sprays as new aphids appear, but it you hose the plant off before the insecticidal soap has a chance to dry on the leaves, the leaves should be okay. Best wishes with your fuchsias!
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