I planted ~24 Early White Vienna and ~4 Early Purple Vienna plants on April 30. I am in South Central Illinois about 35 miles due east of St. Louis, we had a very late spring. All of my plants are growing well, but all of the Early White Vienna are growing flowers. I've grown kohlrabi for 5 years and this is the first time this has happened. Can you tell me why and if the stems will still grow bulbs and be edible?