Moving seedlings from a seed tray and replanting them with more space for development.
Seeds sown indoors are usually sown fairly thickly in seedtrays of low-nutrient compost. Once the seedlings come up, they can quickly become overcrowded. To avoid a check in growth, they are usually transplanted almost immediately at a spacing of about 2.5-5cm (1-2") in another seedtray filled with compost with more nutrients, and moved soon after to a cooler and less humid situation, to avoid damping off. This process is called pricking out.
The operation of transferring seedlings from the pots or boxes where the seeds were sown into other containers in which the seedlings can be planted individually or spaced farther apart.
Transferring seedlings to individual pots, or given more space in a seed tray, to allow uncrowded development.