Making an LED Seed Starting Station from Concrete and Wood

The stand also features a bridle joint and attaches to the concrete base with a tenon. And that cool (or warm) orange metal cover hides a seed starting heat mat resting in the concrete tray. Using metal allows the heat from the mat to transfer to the seed starting trays, providing the much-needed heat for seeds! And that frame around the seed trays is not just for looks. Some seeds need serious heat to germinate (I'm looking at you, pepper plants), so this wood frame also helps insulate the trays as well. Let's make seed starting look good!