I found these onions at my local nursery already planted in little pots. I have no idea what kind they are. Will they continue to grow and get big ? I know it is a dumb question but I have never grown onions before except for the bunches of individual ones I get at the nursery. I was told by a neighbor to remove as much soil from around them as possible without disturbing the root and they should get big. They were planted mid May. Thanks for any advice.