You could consider getting your friend a Hydroponic Herb Garden Kit. This could be a great personalized gift that speaks to their interest in hydroponic gardening. Other gift ideas could be a set of premium hydroponic nutrients, a hydroponic planter, or even a certificate to attend a hydroponic gardening class. It's a special gift that also shows that you've taken the time to think about their interests.
Or you can get her/him a star map with the date of the wedding.
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.