#MISS'S Model #2836 designer planter Fill Port Plug Double Wall Design Planting Basin Water Trough Questioner Plug. Overflow Hole Water Reservoir « Planter has builtin water reservoir and overflow drainage hole. ® Avoid using garden soil or top soil for container planting. its often too dense and restricts alr circulation. A potting mik is strongly recommended and will ensure better plant. growth. » Rinse clean with a garden hose, for a deeper Clean, use a power washer.