Sphagnum Moss Has Strong Water Absorption and Retention, Widely Used in Horticultural Seedling Raising

Sphagnum moss is the collective name for plants of the genus Sphagnum in the family Sphagnaceae, widely growing in swamps, wetlands and other moist environments around the world. Its most prominent feature is its extremely strong water absorption and retention capacity; after drying, it can absorb several times or even dozens of times its own weight in water, so in horticulture it often appears under the name water moss.

In appearance, sphagnum moss plants are short and small, mostly pale green or yellow-green, and some species take on red or purple tones when exposed to sufficient light. It prefers acidic, nutrient-poor and humid environments, growing continuously at the tip while the lower part gradually ages, and after the plant remains accumulate over a long period, they form the peat commonly seen in horticulture, that is, peat moss.

In horticultural applications, sphagnum moss has a wide range of uses. After being processed into dried products, it is an ideal medium for sowing and seedling raising and for rooting cuttings, retaining water while allowing air through, and the survival rate of sowing often performs well; it is also commonly used for potted orchids and for growing carnivorous plants such as Venus flytraps and pitcher plants, as it can create a moist, weakly acidic environment. Before use, it generally needs to be soaked in water to moisten it, so that the fibers fully expand, making it easier to lay out and work with.

When caring for such plants in daily maintenance, attention should be paid to keeping the substrate moist but not waterlogged for long periods, and the environment should be well ventilated, with bright scattered light being suitable, avoiding exposure to strong sun that causes the plants to turn yellow and wither. In addition, a distinction should be made between sphagnum moss and peat soil: the former is a living moss plant or its dried product, while the latter is a growing medium formed by the long-term accumulation and decomposition of plant remains, and the two differ in nature and use.