What is a flower garden called that makes a picture or spells words?

Carolee: What is a flower garden called that makes a picture or spells words?
I’m looking for the word that describes how flowers are planted or arranged in a garden to make a picture or spell out words. It’s usually a large garden display, and the flowers form words (like at the end of a city and the flowers would spell out the name of the city, or the flowers would make a huge clock face).

What’s that called?

Answers and Views:

Answer by reynwater
Topiary. https://search.yahoo.com/search?p=topiary&fr=ush-ans