What is a seedling that grows in a small container with soil around the roots called?

A seedling that grows in a small container with soil around its roots is referred to as a containerized seedling. This term specifically describes seedlings that have been grown in a pot or other container, allowing the roots to develop in a controlled environment. Containerized seedlings are often used in forestry and horticulture for reforestation or landscaping efforts, as they can be easily transported and planted with minimal disturbance to their root systems.

The growth in a container helps to protect the young plant from environmental stresses and provides the necessary nutrients and moisture in its early stages of development. This method is advantageous because it allows for planting at any time when conditions are suitable, as opposed to relying solely on seedlings grown directly in the ground, which are often limited by seasonal planting windows.

Using containerized seedlings can help to ensure better survival rates in new plantings, as they're well-rooted and more resilient when being moved to their final planting locations.