Cyrus Gardner, it's not totally bogus at least as I understand it. Basically, the virus is everywhere and all potatoes harvested have it. The virus is harmless to you. If effects the potato by reducing yields... alot. By more than 50% to the best of my knowledge. That's why it's best (ignoring cost) to plant certified, virus-free potato seed. This is produced by tissue culture in a laboratory. The thing is, the virus builds up and increases in strength and effect from one year to the next. So the first-year potatoes in the field become infected but suffer little. Replanting those next season gets worse, and so on. I have no idea how much it is year-to-year. But I'm beginning to think the cost of seed potatoes is too high and I think I will try grocery store potatoes and see how it goes. Hopefully, these potatoes were grown from virus-free seed and the yield reduction won't be too bad. I'll find out. But I would also likely purchase new seed potatoes from the grocery store every year.

There's a list floating around this website that has alot of online suppliers, can't find it though...I got my seed recently from the below company. Most local garden centers should also have some bulk seed, but I was concerned about quality, since the bins I've seen are bunched together and it's inevitable that different seeds will spill/mix...kinda like a salad bar. Here is a link that might be useful: Hogan Seed Company

Swallowtail has this one (but I know you're looking for Snowdrift) I, too, love that 'moppy' look of SD, but figured I'd toss this out there. AN5099 VANILLA IMPROVED HYBRID MARIGOLD SEEDS Tagetes erecta Elegant 2.5-3 inch soft creamy-white fully double blooms on compact 16 inch plants. Vanilla is an outstanding garden performer and is a major improvement over previously introduced white marigolds. Prefers afternoon shade. The bulk section lists them 500 seeds for $34.99

I purchase Turface at Fisher and son in Malvern. http://agmap.psu.edu/Businesses/1466 Hilltop Distributors in Media carries poultry manure, green sand and other products http://www.contractorssolutions.com/HilltopDistributors.htm You could probably have things delivered from Penn State Seed Company http://www.pennstateseed.com/ They sell Bio-Comp, a wonderful growing medium made from bark and peanut hulls. They sell Perlite, too. http://www.pennstateseed.com/index_files/Page528.htm this is a list of some products.