How can I effectively use a planter around a tree trunk to enhance the aesthetic appeal of my garden?

To enhance the aesthetic appeal of your garden using a planter around a tree trunk, choose a planter that complements the tree's size and shape. Plant colorful flowers or greenery that contrast with the tree's foliage. Ensure the planter is the right size and shape to not obstruct the tree's growth. Regularly maintain the planter by watering and pruning to keep it looking neat and attractive.