If the leaves are curling, it’s probably aphids. You can tackle aphids with drenching the leaves with dish soap and water. If there are holes in the leaves, it could be beetles. Pesticides may be effective, but picking them off and dropping them in a pail of soapy water works too. If something is eating just the new leaves, look for signs of slugs. To battle them, pour some beer in a shallow dish and place it in the garden next to the plant.
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