I tried some russet potatoes this year. I just planted pieces from 2 large russets. I put them in a 5 gallon bucket and gradually filled it to the top with soil. It had a beautiful set of leaves and flowered. When it all died down, I went to harvest my potatoes. All I found were a bunch of marble sized ones and one tomoto hornworm pupa! Why don't I have any large full size potatoes?