I purchased 3 tuberous begonias in 4 inch pots today. I have a container that measures 10" x 10" and is about 3-4" deep. Can I plant all three begonias in this pot or is it too small?

If not, what kind of plant would you recommend for this size container? It is glazed ceramic with a hole. Please, no hens or chicks, I have plenty of those already. I was planning on placing this container on my patio table. Thankyou.