Fertilising a Polystichum setiferum 'Herrenhaus'
To ensure the lush, verdant fronds of Polystichum setiferum 'Herrenhaus' remain vibrant throughout the seasons, a prudent fertilization regimen is key. This species thrives when supplied with nutrients at the onset of the growing season. An application of a balanced, slow-release fertilizer in early spring can bolster the fern's health and vigor. Given its preference for humus-rich soil, incorporating compost or well-rotted manure into the soil may also be beneficial, enhancing both nutrient content and soil structure.
It's not necessary to fertilize frequently; once at the beginning of the growing season is typically sufficient for this hardy fern. Over-fertilization should be avoided to prevent the potential for excessive growth, which may compromise the plant's natural bushy and spreading habit.