What type of soil amendment is used to improve drainage and aeration?

The use of perlite as a soil amendment is highly valued for its ability to improve drainage and aeration in soil. Perlite is a lightweight, volcanic glass that is heated to high temperatures, causing it to expand and create small, air-filled particles. These particles facilitate the movement of air and water through the soil, preventing compaction and allowing roots to access necessary oxygen. This characteristic is particularly beneficial in potting mixes and garden beds, as it helps create an environment that promotes healthy plant growth.

In contrast, compost, peat moss, and sandy soil serve different primary functions. Compost is rich in nutrients and enhances soil fertility, while peat moss retains moisture but can lead to compaction if used in large quantities. Sandy soil, although it inherently drains well due to its larger particles, lacks the nutrient-holding capacity that perlite provides when mixed into denser soils. Thus, perlite stands out specifically for enhancing both drainage and aeration properties, making it an ideal choice for improving overall soil structure.