@watergirl62
Depends upon which USDA ag zone you’re in. I use Southern Exposure Seed Exchange, Natural Gardening, Renee’s Seeds, Territorial. I try to stay with things that do well in my zone 9, though I’ve tried Johnny’s, they don’t always work this far south. I also buy from the Mennonites north of Lake Charles, LA. They carried Baker’s. Bradford watermelons are amazing, but they’ve been rationed to 10/per expensive pack, they’re heirloom & worth it. I try to make sure I use heirloom, non-GMO seeds and plants when I can, & now I’ll have to do more seed saving since seed companies are swamped.
I use a mix of compost, manure, ground oyster shells (called chicken grit here) bone & blood meal, alfalfa pellets, rotten cotton seed hulls and clean charcoal. I double dig the soil with a fork & square shovel , mix in the amendments listed above & mix well. I do a raised bed out of cypress or stones because my soil is too alkaline. I can only get cow manure now, can’t find a source for horse or sheep which I prefer. Been doing this for 45+ years.
And I sow seeds dry & set plants in wet, with a mix of liquid fish fertilizer, liquid kelp, hasta-grow, & that odd vitamin thing, can’t remember what it’s called, & pour 1/4 cup of this mix into a gallon of water & shake. Put it in the hole and plant seedlings. My major enemies: raccoons, possums, stink bugs. I also grow citrus, peach, pear, not well, figs & southern plums.
Your local ag agent will test your soil for free & tell you what you need to fix. But some states suggest chemicals, which I try to avoid because I need the bees to pollinate.
Phew, epistle from an old gardener. Good luck