By Teo Spengler Boston ferns (Nephrolepis exaltata ‘Bostoniensis’) are old-fashioned ferns with beautiful arching fronds. They require adequate sunlight, water and nutrients to thrive, and good cultural practices help keep your fern healthy. If your fern doesn’t get the best care – or even if it does – it may be attacked by Boston fern diseases. Read on to learn more about diseases of Boston fern plants. Common Boston Fern Problems If you fail to water your potted fern appropriately, over or under irrigation can lead to unhealthy Boston ferns. Most fern instructions advise you to keep the soil constantly moist. But this is not the same as allowing the soil to be wet or the plant to become water-logged. To avoid issues with Boston ferns, water the plant thoroughly when the top of the soil is dry. Keep watering until it leaks from the drain holes in the bottom
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