Yes. Urban planter box designs can hide the drainage tray while keeping drainage reliable. The cleanest approach is usually a two-part system: an inner planting container with drainage holes sits above a concealed tray or reservoir, and an outer shell or removable base panel hides the tray from view. Overflow outlets can be routed to the back or underside, and a small access door lets you empty the tray without lifting the whole planter.
Common designs include integrated self-watering planters with a false bottom that separates soil from a hidden water reservoir; skirted or recessed-base planters where the outer shell extends below the drainage tray to create a clean, floating look; concealed drawer trays that slide out from a hidden side panel for easy cleaning; slot-drain planters that channel water to a rear collection chamber; and modular bench planters with an internal drainage tray accessed through a lockable panel.
For a truly clean look, choose planters with internal overflow protection, removable trays, and adequate airflow. Make sure the hidden tray is accessible for cleaning and seasonal maintenance; otherwise, trapped water, odors, and root rot can become a problem. Also confirm that the planter can handle wet soil weight, especially on balconies and roofs. A well-designed concealed system hides the hardware, not the maintenance.