This is my first time growing corn in my square foot garden. All was well, they were growing nicely. The silk started to grow and I could feel the beginnings of earns of corn through the husks. Yesterday, I went out to water and I noticed that husks are opening and revealing immature stalks of corn. Why are they opening??? I water well, added a slow release fertilizer and compost at the beginning of the season and just topped off with more compost and a little more Osmocote. The only thing that has changed is the weather. No rain for a looog time at temperatures in the high 90s-100 degrees last week or so. But, I water reguglarly. Any help appreciated.