What Is Eating My Pepper Seedlings?

Raising pepper seedlings takes weeks of patience — peppers are slow — so finding them chewed to stubs, cut off at the base, or riddled with holes overnight is especially gutting. Young pepper seedlings are tender and defenceless, and a few common pests can kill them fast. Identifying the culprit quickly lets you protect the survivors. Let me walk you through the usual suspects and how to tell them apart.

Slugs and snails

The most common seedling-killers are slugs and snails. If your seedlings have ragged holes, are stripped of their soft leaves, or have vanished entirely, and you find silvery slime trails on the soil or nearby in the morning, these are your culprits. They feed at night and in damp weather and can clear a tray of pepper seedlings in a single night. Go out after dark with a torch to confirm and hand-pick them, set beer traps, clear damp hiding places, and ring the seedlings with a gritty barrier like crushed eggshell or grit that they dislike crossing.

Cutworms

If seedlings are found cut off cleanly at or just above the soil line, toppled as if snipped, the culprit is the cutworm. These soil-dwelling caterpillars hide just below the surface by day and emerge at night to chew through tender stems at ground level — devastating to young transplants. The classic defence is a collar around each seedling: a cardboard tube or cut plastic cup pushed an inch into the soil physically blocks the cutworm from reaching the stem. Clearing weeds and disturbing the soil before planting reduces them.

Flea beetles

If the seedling leaves are peppered with many tiny round holes, as if hit by miniature buckshot, and tiny beetles jump away when disturbed, that is flea beetles. They are especially damaging to young pepper plants, which can be badly set back or killed, even though mature plants usually shrug them off. Protect seedlings with floating row cover from the start, keep them growing strongly, and use sticky traps or a light treatment if numbers are high.

Protect young peppers

The best protection for vulnerable seedlings is a physical barrier. Floating row cover laid over the seedlings keeps out flea beetles and, to an extent, other pests, while letting in light and water — remove it once plants flower so pollinators can reach them. Cloches or cut-bottle covers protect individual plants from slugs and cutworms. Because peppers are slow, it often pays to grow them on to a sturdier size in pots before planting out, so they can better withstand the pests that would kill a tiny seedling. Match the damage to the pest — ragged holes and slime equals slugs; clean-cut toppled stems equals cutworms; tiny shotholes with jumping beetles equals flea beetles — then protect the rest, and shepherd your slow-growing peppers safely through the danger period.