My Strawberry Plant Crown Is Rotting at the Base

Strawberry plants that wilt suddenly and whose crown — the central growing point at the junction of roots and leaves — is visibly brown, soft, or disintegrating when you peel back the outer leaves have crown rot. This is a serious condition that is almost always fatal to the affected plant. The crown is the most physiologically important part of the strawberry plant, and once it is substantially rotted, the plant cannot be saved. The question becomes identifying the cause to prevent further losses in the bed.

Phytophthora crown rot

Phytophthora cactorum causes a crown rot that is often associated with red core root disease (Phytophthora fragariae) in wet soils, though it is a different species. Affected crowns show brown to dark brown discolouration that begins in the outer crown tissue and progresses inward. The surrounding soil is typically wet or waterlogged. Management is the same as red core: improve drainage, remove affected plants, and avoid replanting strawberries in the same area for several years.

Botrytis (grey mould) crown infection

Botrytis cinerea, the grey mould that affects strawberry fruits, can also infect the crown — particularly in cool, very humid conditions in early spring when new growth is beginning. Affected crowns develop a grey-brown rot with visible grey spore masses (the characteristic fluffy mould) under the leaf sheaths. Unlike Phytophthora, Botrytis crown infections sometimes occur in drier soils with poor air circulation around the crown. Improving airflow by not planting too closely and removing dead leaves regularly in autumn reduces risk.

Planting depth

Strawberries are extremely sensitive to planting depth — the crown must sit exactly at soil level, not buried below it and not elevated above it. A crown buried even 1 cm below soil level is in contact with damp soil and decaying leaf material, creating ideal conditions for crown rot pathogens to colonise. A crown elevated well above soil sits in air and desiccates. Correct planting — the crown just at the soil surface — is the single most important prevention measure for crown rot. Check established plants after heavy rain moves soil, and if any crown has been buried, carefully scrape soil away.