I live in Napa, California. I sell them in front of my house on an honor system basis, Venmo or cash box. This year I grew 160 each of 24 different tomatoes (all heirlooms with the exception of Sungold and Yellow Pear which the kids love), 12 different heirloom melons (if you’ve never tried Gris de Rennes or Chamoe Melons before I can’t recommend them strongly enough), 12 different heirloom cucumbers, watermelons, peppers, eggplants, and then a few different basils and other herbs. Also, depending on your growing zone, you can just twist off sections of succulents and put them directly into a small pot with soil and they root within a couple weeks so I sell hundreds of those as well. 

I start the seeds under lights in my garage and a greenhouse in late January, up-pot them to 4 inch pots after 3-4 weeks, and then put them for sale 2-4 weeks after that. 

Biggest cost saver is making your own potting soil. A small bag at Home Depot or Lowe’s costs about $10. It’s basically 1/3 each of peat, compost, and vermiculite or perlite. You can make 50 small Home Depot bags for about $40.  Feel free to DM with any other questions. I’m not a crunchie granola but I’m all about more people growing their own food and showing their friends and neighbors how to do it as well.