Wider than tall is my favorite type if pot for potting plants. Plant roots in the garden are 4 to 6" deep. 95 percent of all plant roots are within this shallow zone. Pots that are wider than tall also inhibit over watering. Too much soil and not enough roots to suck up the water, and no drain hole? Root rot for sure.
For more personalized answers please send a picture, tell us what plant you are potting, where this plant lives (indoors, out of doors), what soil you are using. It is critical to use JUST sterilized potting soil for all potted plants. All.
The best plants for shallower pots are succulents and cactus. These plants can not stand too much water and their roots are very shallow. Regardless, most plants will love a wider than deep pot as long as you are using potting soil. Bagged and sterilized potting MEDIUM. Never use the garden soil. Don't even try to make your own soil. Unless you are able to COOK that soil and all of the non soil amendments that potting soil contains it is worth the life of your plants in pots.
What type of plant are you imagining? Let us know what you would like to plant in that pot, send us a picture of your pot. Be sure you use potting soil/medium to re pot whatever plant you purchase. Don't try to grow from seed in a big pot. Purchase a beautiful plant from the store and make sure you ask what and when it was last fertilized and what light source the plant acclimated to. Indoors under artificial lighting or out of door in the sun already acclimated?
All plants have different needs. Some love to always have a bit of moisture, most hate wet roots. All have to have a tiny bit of balanced fertilizer.