Gardener's husband thinks hornworms and aphids come from soil (Miracle-Gro). Wife seeks clarification.
Larvae of moths. Confusion: mature larvae drop to soil to pupate. Adults lay eggs on plants → larvae hatch on plants.
Plant-feeders. Most wingless, but winged forms disperse plant-to-plant. Aphid info.
Neither comes from potting soil. Soil is pupation site for hornworms only.
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