Please help identify this volunteer plant that emerged next to an Arborvitae. It is not present anywhere else in the yard. Location: WA – Zone 8. I organized the 4 photos by date, starting with the latest (2024/10/15) with 2 photos to the earliest (2024/10/09) with 2 photos.

Please help identify this volunteer plant that emerged next to an Arborvitae. It is not present anywhere else in the yard. Location: WA – Zone 8. I organized the 4 photos by date, starting with the latest (2024/10/15) with 2 photos to the earliest (2024/10/09) with 2 photos.

by FoxButterfly62