One of my favorite things about winter is seed starting. Once you know your last frost date, you can easily determine what seeds can be started. There are two primary ways that I start seeds: soil blocking and plug trays. Soil blocking requires a tool to create blocks, a specific type of soil to hold blocks together, but takes up less space. Plug trays are great for seeds that take longer to grow and require more room to grow, like eucalyptus and lisianthus. Both are beneficial methods. I also use heat mats, humidity domes, and shop lights during the seed starting process. All are linked here (affiliate link).
Soil Blocking allows the roots to air prune and creates vigorous plants. Sanitized meat trays make a great place to start 40 seeds at a time. I highly recommend that you plant seeds of the same variety on whatever tray you choose to use. Each type of flower germinates in it’s own time. For more about seed starting using soil blocks, watch this video.
Whether I use plug trays or soil blocks, most seeds start on a heat mat and underneath a humidity dome with water daily until the majority of seeds germinate. Once that happens, I remove the humidity dome, take them off of the heat mat, and put them under lights. Shop lights from any home improvement store work great. I continue to water them daily and fertilize seedlings once a week with diluted fish fertilizer before hardening off for a week outside in a shady area. Once they have been hardened off, they are ready to plant. Let me know if you have any questions about seed starting in the comments.