If you dream of talking and moving plants, it means you have been spending time with plants. Its highly likely you love gardening and have a green thumb. This theme in your waking life, has continued into your night life in dreams. Its natural to dream of the theme that you have spent much time on.
In waking life, are your plants growing healthily? If you have seen a sick plant, this topic may stay with you day and night, until you find a solution to help that sick plant. That would e a reason why you dreamed about a talking plant. The topic of conversation was likely to have been about the plant’s illness.
If you dreamed of plants, did they resemble anyone in your life? Did the talking plants remind you of anything or anybody?