Strawberry plants are a great choice for home gardeners, allowing for a constant supply of ripe, fresh strawberries. If your strawberry plants are turning brown, the culprit is most likely a fungus.
Strawberry leaf scorch is caused by a fungus and is one of the most common strawberry plant diseases in North America. This disease causes strawberry plants to turn brown and can end up destroying the plant.
In some cases, leaf-scorched plants can still grow and produce fruit but to a lesser extent than a healthy plant. The disease weakens the strawberry plant so it is more susceptible to death by extreme temperatures or drought.
Manganese and iron deficiencies in strawberry plants can also result in leaf colour changes and these leaves can appear yellowish and eventually turn brown.