When can you prune Dianthus (sweet william) in Central Mexico?

Question

Are Dianthus annuals or perennials in Central Mexico? Will they come back yearly?

Answer 1

Dianthus' habits are more related to the variety of plant than to where it's growing. This article has more information: https://www.gardeningknowhow.com/ornamental/flowers/dianthus/growing-dianthus-plants.htm