Take this page for example it's just the word Seeds and a couple of photos. The point is there but really needs to be presented more style in regards to the graphics, white space and add more text - content.
Over all the products are fine but the site is lacking a bit of style in general to me. I think it's cause this is a basic oscommerce setup modified here and there and it's not getting the message across.
I agree with Chicken.. if no phone, physical address is not good. People want to feel comfortable making purchases. Kinda looks like you have everything thrown on the website and just need to tidy up a bit. You should do well with this, but you'll do even better the more professional it looks and "feels" to your visitors.
Excellent advise from others here and I'm sure you'll get more helpful feedback as you fix up what they recommend and come back for more until you get it right