Dreaming about the death of a loved one, especially a parent, can be quite impactful and often reflects deep emotional processes. In your dream, your mother's death and the subsequent funeral may symbolize feelings of loss, grief, or unresolved issues related to your relationship with her. The act of cleaning out her place and dealing with her belongings can represent the need to confront and process these emotions, as well as the desire to let go of the past.

Flying to Denver with your brother may indicate a journey of support and shared grief, suggesting that you both are navigating this difficult time together. The plants and random items you encountered could represent aspects of your mother’s life or legacy that are unfamiliar to you, symbolizing the complexity of her existence and the memories tied to her.

Overall, this dream might be encouraging you to embrace your feelings of loss, seek support from loved ones, and find closure. It might also be a reminder to cherish the memories you have while allowing yourself to process the grief in a healthy way. Consider reflecting on your current feelings about your mother and how they influence your life now.