Harris Seeds traces was founded in the 1870s. It sells seeds both to home gardeners and to farmers. Many, with some varieties, most of their seeds are F1 hybrids. If you don’t save your seed, then I personally wouldn’t worry about it. They sell to organic farmers and so do offer untreated and organic seed. They also sell to growers who grow in greenhouses, so you will find specialty seeds for peppers, for example, for use in greenhouse horticulture although not in home gardener quantities. A solid commercial seed supplier. They sell a product I have not come across before, a plastic mulch/blanket ground cover with built in drip irrigation. The current price is around $70 for an 8X10 blanket, but it lasts 5 years uncovered and 20 if it is mulched so a low amortized cost. Liquid fertilizer can be fed into the system. A seed catalog well worth reading. Be sure to look at the garden tunnels and other season extending products.