About us. At The Brown Thumb Plant Shop, we are dedicated to promoting positive mental health and self-care through the growth of plants and fostering a supportive community. The Brown Thumb is a small business in Denton, TX. Join Our Team at The Brown Thumb. Are you passionate about plants and self-care. Do you thrive in customer-facing roles and love the idea of working in a small, vibrant shop environment. If so, we want you to join The Brown ...