producing a nice homepage is plenty of work, but it is not very expensive. Did you calculate the packaging?
You mean tomato plants, if yes: how much do people normally pay for one tomato plant? Is it worth packing? How many people are passing you house daily? Why not a market? Do you need any permissions selling at the driveway? Are you shure that you are alway at home during normal selling hours?
Did you search for other websites selling the same in your country? Why should people sell from your site?
I hope you have answered all the questions yet - good luck!