Petunia Flowers

Today I'd like to show you some of the petunia flowers I bought to my father a couple of months ago.

I remember when I bought them they were so small, some of them had one bud, you could hardly see what color it is.

Look at them now, they are growing every day and are full of flowers.

I was thinking of how I haven't seen yellow petunias. I don't think they exist. Has anyone see yellow petunias?