How about a botanical print of his favorite plant or flower? You can find these online or at a local art store. Another idea is a book on the history of botany or a book about plants in your local area. If he likes to garden, you can also get him a set of high-quality gardening tools or a unique planter. Lastly, a subscription to a botanical or gardening magazine can also be a great gift idea.
Or you can get him a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.