Difference from average in the timing of the start of Spring 2016
![Difference from average in timing of the start of Spring 2016](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Difference%20from%20average%20in%20the%20timing%20of%20the%20start%20of%20Spring%202016%2C%20as%20estimated%20through%20an%20index%20of%20early-leafing%20plants%204.7.2016.png?itok=Sea9_xBX)
Detailed Description
Difference from average in the timing of the start of Spring 2016, as estimated through an index of early-leafing plants as of April 7, 2016. www.usanpn.org/data/spring