I recently made a mistake that almost wiped out my sweet pea seedlings: I left them in cell trays for too long and they started to become root-bound. If your seedlings are looking pale, turning yellow, and won't seem to grow any further, it might be that you're also experiencing the same issue.
Just like other plants, seedlings can become root-bound if they're left in smaller pots or seed trays for too long, often caused by sowing seeds too early. The roots run out of room and start to circle, creating a dense root mass that leaves little soil to provide moisture and nutrients. The result is leggy seedlings, stunted growth, discoloring foliage, and the eventual death of the seedling if not addressed.
