Create a different symbology based on an attribute

[Data_TA]

Is there a way to add a symbology for points that have a specific attribute when the layer already has a symbology set on a certain field? A layer I use already has symbology set to a specific field named "Planting Season". However, I'd like to create a different symbol for points that have the value "Stump" under the "Genus" field. Is this possible to do if the current symbology is sourced from the Planting Season field? 

I have looked at the symbol properties that can be changed based on attribute values but I am looking to use a different symbol entirely. The current symbology based on planting season uses solid-fill dots, and I would like to use a different symbol. Below is an example of the current symbology that's based on the "Planting season" field and how it uses solid-fill dots. Could I create a rule or something that uses a different symbol for points labeled as "Stump" under the field called "Genus"?

[Robert_LeClair]

An easy way to do this is:
1.  Duplicate the layer in the Contents Pane
2.  For the newly created copy that is above the existing layer, create a Definition Query Genus='Stump'
3.  Symbolize the top layer with your desired "stump" symbol.
4.  Keep the original layer below, symbolized by planting season.  

I "think" this would work.  Question - do you need the stump symbol to be a single symbol or by season year as well?