What Are These Caterpillars Of – Found In Old Tomato Pot Soil

Question

Just emptying old flower pots to wash before putting to winter bed, & found 13 of these. They’re the colour of raw prawns with brown heads.

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Answer 1

Those are grub worms you often hear about and probably dig up when you are planting. They are the larva of various beetles, such as Japanese beetles.

https://www.gardeningknowhow.com/special/containers/grubs-in-garden-pots.htm