Creating a prehistoric-themed outdoor plant box is a fantastic way to bring the ancient world to life in your garden. To achieve an authentic Jurassic or dinosaur-era vibe, focus on plants that have existed for millions of years. Here are the best options:

1. Ferns: These lush, green plants were abundant during the prehistoric era. Species like the Boston fern or maidenhair fern add a dense, jungle-like feel.

2. Cycads: Often called "living fossils," cycads resemble palm trees and were a staple in dinosaur habitats. The Sago palm is a popular choice.

3. Horsetails (Equisetum): With their segmented stems, horsetails mimic the look of ancient plants and thrive in moist conditions.

4. Ginkgo Biloba: One of the oldest tree species, its unique fan-shaped leaves add a touch of prehistoric elegance.

5. Mosses and Liverworts: These primitive plants create a ground cover that mimics the forest floors of the Mesozoic era.

Pair these plants with rocks, driftwood, or faux dinosaur figures to enhance the theme. Ensure proper drainage and sunlight for each species to keep your prehistoric plant box thriving. Whether for a garden corner or a balcony, these plants will transport you back in time!