A small plant with four starter leaves in a plastic cell with soil.

Thinning Seedlings

What?! I have to toss some of these perfectly healthy seedlings I worked so hard to start? Which do I save and which do I not? That is the reaction of many a new gardener upon first learning that thinning seedlings is a necessary step to ensure healthy growth of plant starts. The reality is that, if left in crowded environs, your seedlings will eventually suffer.