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Controlling aphids indoors over winter on milkweed

3 months ago

I'm having trouble finding what is ok to use on my tropical milkweed plants and cuttings that I've brought in to overwinter. I want to make sure I don't use something that will stay in the plant and kill monarch caterpillars when I put them back outside next spring. I brought in quite a few, so squishing with my fingers would be hard to keep up with. Aphids multiply much faster in the house than they do outside because there are no natural pests to eat them.

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