Hi, ssb,
Not surprising you are getting conflicting advice. Given Lantana's tender nature, some treat it as an annual or a short-lived shrub. In milder climates, it is treated as a shrub. Depending on how you treat it, and somewhat depending upon where you live will dictate what you do. As a general rule, it is best to prune in mid-spring before new growth resumes. Also as a general rule, Lantana likes little pruning. Having said that, I have been brutal in the past and cut it straight back in autumn (I live in Southern California where winters are very mild so I can get away with that) and it sent out new shoots in spring nicely. Lantana is used along freeways, etc, here and get very little pruning until they are mercilessly hacked back when they get overgrown. They are tough plants as long as they don't get hit by frost /frozen temps. Given all this, my advice to you is to minimally prune in mid-spring, removing unsightly or misplaced shoots, perhaps removing no more than 1/3 of the branches if you want to promote bushier growth.
Kathy C
Replied: Thursday 20th of September 2012 05:41 PM