Does the age of the dill plant affect its appearance, aroma and texture? I bought some fresh cut dill for cooking that was very feathery and fine, and had quite a distinct aroma. Some dill I bought recently did not have the same qualities. The leaves were less fine and the aroma didn’t seem obvious (photo attached). Could this have been a different variety or just from an older plant?
Yes, there are many different varieties of Dill.
It may not be easy to identify culinary varieties unless they are labeled.
Here is a great article the highlights some of varieties that are commonly grown.