It’s easiest to wait until the seedlings are tall enough to grasp.

It’s easier to pull up roots from damp soil.

Taller seedlings aren’t always stronger. Avoid choosing tall and spindly seedlings, as these may not become healthy adults.

If the spacing is too small you may need to thin out the seedlings again later. The recommended spacing varies between plants. For example, for beans it’s 4 in (10 cm) and for corn it’s 1–1. 5 ft (30–46 cm). [7] X Research source

Press your fingers on the soil around each desired seedling when you remove the neighbors if you are worried about disturbing the roots. Discard the seedlings when you are done. Alternatively, you can wash the microgreens and use them in a salad!

You can thin out any seedlings with scissors if you are worried about damaging the roots of the desired plants. However, it takes longer than simply pulling up the roots. [10] X Research source