Creating a dinosaur-themed outdoor plant box is a fun and educational way to bring prehistoric vibes to your garden. To achieve an authentic Jurassic look, focus on plants that resemble those from the Mesozoic era or have a primitive appearance. Here are the best plants to include:

1. Ferns: These ancient plants were abundant during the dinosaur age. Opt for species like the Boston fern or maidenhair fern for lush greenery.

2. Cycads: Often called "living fossils," cycads like the Sago palm mimic the look of prehistoric flora.

3. Horsetail (Equisetum): With its segmented stems, horsetail adds a primeval touch to your plant box.

4. Ginkgo Biloba: This ancient tree species, known for its fan-shaped leaves, dates back to the time of dinosaurs.

5. Mosses: Use varieties like sheet moss or cushion moss to create a dense, jungle-like ground cover.

For added drama, incorporate dinosaur figurines or fossils among the plants. This setup not only looks stunning but also serves as a great conversation starter for kids and adults alike. Choose hardy plants suited to your climate to ensure your dinosaur garden thrives year-round.