There is no significant functional difference between a seed tray and a seedling tray. Both are used to grow seedlings from seeds. However, seedling tray is the more commonly used term in professional nurseries and commercial farming in Australia, while seed tray is often used in home gardening. In practice, both terms refer to trays with multiple cells or holes for early plant growth.

A tray cell is an individual compartment in a seedling tray where a single seedling grows. Cell size and depth affect root development and plant strength. Properly sized cells allow roots to grow straight and healthy, reducing transplant shock. In nurseries and commercial farming, selecting the right tray cell helps produce consistent, high-quality seedlings.

Reusable plastic seedling trays with good drainage and aeration are best for greenhouse use. These trays are durable, easy to clean, and suitable for repeated planting cycles. In controlled greenhouse environments, consistent tray and cell design helps maintain uniform growth and efficient watering, making them ideal for commercial nurseries.

A modular seedling tray is a system where trays or cells can be combined or separated as needed. This design offers flexibility for different crops and growing stages. Modular trays are often used in commercial nurseries to improve efficiency, simplify handling, and optimize space usage.