What most naturally follows?

How to plant seeds in a basic seed tray
Plan to start planting seeds between 6-12 weeks before the last frost date.
Actual growing time for seeds will depend on what plants you've decided to grow. Planning around the last frost date for your area will help you determine when to start germinating the seeds.
Read the packaging on the seeds you are planting to see if additional steps, such as soaking or chilling, need to be taken before they are planted. Purchase a cell tray with drains for an easy option.