Provided are a nursery seedling material, a nursery seedling tool, a nursery seedling unit, and a seedling production method which can easily be installed and improve the efficiency of growing large seedlings. A nursery seedling unit (12) has a nursery seedling tool (18) and a seedling (19). The nursery seedling tool (18) has a nursery seedling material (23) and a seedling bed (22). The nursery seedling material (23) includes a cellulose acylate having an acyl group. The nursery seedling material (23) has a cylindrical shape, and is provided in a raised fashion relative to the seedling bed (22). The nursery seedling material (23) has formed therein a hollow portion (23h) through which the seedling (19) from the seedling bed (22) grows, and supports the seedling (19) to be grown.
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