I saw my first dead show in 1973. I've been moreling longer. Morel season starts when the first bud opens on a lilac and ends when the last bud dies on the lilac bloom. My grandpa learned that when he was a kid in the 1920's and taught me in the 60's. Science says first morel when 4 inch ground soil is 53 for 3 days. That is exactly when I see the first lilac blooms. It has been accurate for me for 45 years.