I think I have some clues as to why some of my radishes are not fully developing. If you look closely at the picture you'll notice that the outer parts are dry and they slope inward towards the center which is nice and moist. I need to make sure the soil is level all the way across and I remember I didn't rake my box before planting. I just patted the soil down with my hands. Another live and learn example.
Eighteen more days till my last frost day of May 15th arrives. My garden window is bursting at its seams with two feet tall tomato plants and more. I may even have some tomatoes growing on them even before I plant them outside. The flowers are opening up and I'm just waiting till they are completely open so I can begin pollinating them.