Why Are There Insects Inside My Artichoke Heads?

Finding insects when you cut open an artichoke head — or watching them fall out when you remove the outer scales — is extremely common and is a sign that your artichoke is a real, living, unsprayed food crop rather than a problem with your gardening technique. The tight, overlapping scales of an artichoke head create a perfect habitat for small insects seeking shelter. Most are completely harmless to the head and to you; a few (aphids in large numbers, caterpillars boring into the flesh) are more significant.

Which insects are commonly found

Earwigs are among the most common insects found inside artichoke heads — they shelter between the scales during the day and emerge at night to feed on decaying matter and small insects. They are largely beneficial in the garden and cause minimal harm to the artichoke itself. Aphids (black bean aphid, artichoke aphid) are more problematic — large colonies between the scales are unappetising even after washing and can make a head not worth cooking if infestation is severe. Caterpillars and beetle larvae occasionally bore into the flesh at the base of the head — these cause visible tunnelling and frass.

The salted water soak

After harvesting, submerge the head upside down in a bowl of cold water with 1 tablespoon of salt per litre. Leave for 30 minutes. The insects emerge from between the scales into the water. Rinse the head thoroughly before cooking. This method is reliable for earwigs, aphids, and most other small insects. It does not remove caterpillars that have bored deeply into the flesh — those require cutting the head open and removing manually.

Preventing heavy insect colonisation

Harvest heads promptly — the longer a head remains on the plant after reaching harvest size, the more insects colonise it. Check the outer scales of forming heads weekly for aphid colonies and remove them before they move inside. Avoid leaving harvested heads sitting in a warm place before soaking and cooking.