Trimming Mexican Petunias? - Knowledgebase Question

Scottsdale, Ar
Avatar for plum_biz
Question by plum_biz
October 30, 2010
Hi. I'm a patio grower with two mexican petunias in large pots. Some of the branches are falling over due to weight (they're newbies), but I'm not sure how to trim appropriately to encourage more growth (and grow fuller). Any advice? Thanks, Tammie

Answer from NGA
October 30, 2010
Mexican petunia, or Ruellia brittoniana, is easy to care for and takes all kinds of pruning, returning with a vengence even if pruned down to 6" above the ground. If that seems too drastic you can simply prune out the stems that have fallen over to make the plant look more attractive. In my garden these plants flower heavily in the spring and fall but they flower sporadically in the summer and winter. You can wait until no more new flowers are produced and then prune your plant back hard. It will respond with new growth and will flower again in the spring for you. These plants increase in girth during the growing season by sending new stems up as the root system expands and in 2-3 years yours will need to be unpotted and divided. Hope this answers your questions.

Avatar for Strofadias
A comment from Strofadias
October 11, 2020
My mexican petunias grow very tall 3 m long . Can I trim them evey week to be 30 cm long?

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