This is an extended ventilation tube designed for large flower pots and bonsai, with a core feature of “dual functionality”:

• Enhances aeration and prevents root rot: Once inserted into the potting soil, the holes in the tube’s wall create air channels that allow oxygen to reach deep into the soil, preventing the roots from becoming waterlogged and rotting—especially ideal for succulents, foliage plants, and other moisture-sensitive species.
• Makes fertilization hassle-free: You can directly pour slow-release or granular fertilizer into the tube, where the nutrients gradually seep through the holes into the soil, eliminating the need to dig up the soil and disturb the roots, resulting in more even and consistent feeding.
• Extended length for optimal fit: The longer version is suitable for deep pots and large bonsai, fully covering the main root zone when inserted, ensuring more effective aeration and fertilization.

It’s a practical tool for beginner plant enthusiasts to avoid “overwatering and root rot” while simplifying the fertilization process.