When to Transplant Seedlings from 72-Cell Trays

Your tomatoes, peppers, dill, and broccoli germinated quickly at 67°F under 12-14 hours of grow lights—excellent conditions! Wait at least another week before transplanting.

The True Leaf Rule

Don't move seedlings until they develop their second set of true leaves (not the initial cotyledons). This ensures root systems are robust enough to handle transplant stress. You may need to thin crowded cells first, but verify root security before disturbing any plant.

Your Setup Is Ideal

Controlled temperature, consistent lighting, and early germination indicate strong starts. Patience now prevents setbacks later—your seedlings will reward the wait with vigorous growth.