Black walnut trees can grow to be 70-150 feet tall. Historically, its wood was valued for making wagons and furniture. Its leaves and husks were also used for dyeing cloth. Its leaves are long, thin, and attached in clusters. The tree is best known for its large seed that is encased in a green shell that turns black when ripe and falls off to reveal a walnut shell.
Here is a link to the Phenophase Guide:
This is a graph of the Activity Curve for 2021:
Here is a Calendar of the Flowering Phenophase stage being observed for the Black Walnut in 2021. The gray marks are times when the tree was observed and determined to not be presenting the phenophase.
Here is a Calendar of the Fruiting Phenophase stage being observed for the Black Walnut in 2021.
The gray marks are times when the tree was observed and determined to not be presenting the phenophase.
Here is a Calendar of the Leafing Phenophase stage being observed for the Black Walnut in 2021.
The gray marks are times when the tree was observed and determined to not be presenting the phenophase.
Number of Observations 2021: 1,191
Number of Observation sites 2021: 10
Number of Visits to Observation sites 2021: 100
Indiana Backyard Observer data downloaded using the USA-National Phenology Network's Phenology Observation Portal <www.usanpn.org/data/observational>
Map of Counties with Observation sites (2021)
Boone, Decatur, Hamilton, Hendricks, Jefferson, Marion, Monroe, Putnam, Starke, and Steuben Counties