One way to do it! I use a method in use by the local greenhouses 50 years ago. I simply scatter the number of seeds I want into a 2" deep tray like what vegtables are in from the grocery store. After they have developed their first true leaves they are transplanted into flats to grow on. Don't water at transplant time as it then becomes hard to seperate close plants. Bare root is ok. The greenhouses today are automated. Seeders plant seeds into soil about the size of a sugar cube which is then transplanted at first leaves. We have a lot of greenhouses in the area. My first years of growing tomato seeds was 70 years ago in a hot bed. Dug a shallow pit, placed manure in it sprinkled nitrogen fertilizer on it, cover it with soil and then a frame with an old storm window. A week later plant tomato seeds. Dad wanted to try some tomatoes but couldn't buy the plants. I found your post interesting. Good gardening and do what works for you! VernGot 4 varieties of tomatoes ( 14 dozen), Cabbage (204 plants) and a dozen Brussels Sprouts started in trays and in the germination chamber. Used my trusty high-tech pencil to make divots in trays and pick up seed. That's a cabbage seed hanging on the end of the pencil. Works pretty slick. Just dip it in water, shake off excess and you can pick up 4-6 seeds before needing to dip in water again. Sure beats a pair of tweezers.
I've tried several ways to start seeds including starting them in paper towels, actually percolator coffee filters work better, the roots don't grow through them like paper towels. Now I have advanced to building my own germination chamber from an old freezer, 2 qt. slow cooker to provide heat and moisture, a heat mat thermostat to control the slow cooker, and a small grow light. I normally have tomatoes and cabbage germinate in 36-40 hours, so I'll have to be checking on them tomorrow afternoon. From there into my mini green house to finish out to transplant size.One way to do it! I use a method in use by the local greenhouses 50 years ago. I simply scatter the number of seeds I want into a 2" deep tray like what vegtables are in from the grocery store. After they have developed their first true leaves they are transplanted into flats to grow on. Don't water at transplant time as it then becomes hard to seperate close plants. Bare root is ok. The greenhouses today are automated. Seeders plant seeds into soil about the size of a sugar cube which is then transplanted at first leaves. We have a lot of greenhouses in the area. My first years of growing tomato seeds was 70 years ago in a hot bed. Dug a shallow pit, placed manure in it sprinkled nitrogen fertilizer on it, cover it with soil and then a frame with an old storm window. A week later plant tomato seeds. Dad wanted to try some tomatoes but couldn't buy the plants. I found your post interesting. Good gardening and do what works for you! Vern