Write an engaging article that highlights the key details of the Denver Urban Gardens’ Spring Plant Sale, emphasizing what attendees can expect and the range of plants available. Explore the significance of urban gardening in promoting sustainability and community engagement, and include tips for selecting the best plants for both novice and experienced gardeners. Discuss the unique offerings at the sale, such as organic seedlings and local artisan vendors, while encouraging readers to participate. Address the benefits of bringing sustainable practices into their gardening efforts and how this event fosters a sense of community. Conclude with a call to action, inviting readers to attend the sale and embrace urban gardening this spring.