Question
i live in southwest florida.i planted pink verbena that i purchased from a local garden center.they did great for over a month.they are now yellowed leaved and brittle.the few buds are brown on the tips.there are few new buds developping.they are in a mixed container with thriving and healthy plants.what is wrong?

Answer
Hi Gail,
Thanx for your question.  Check the plant very closely to see if there are any pests or signs of disease.  None of the other plants seem to be affected?  Could be nematodes.  Take a look at this link and let me know what you think.
thx,
T

http://plantclinic.cornell.edu/FactSheets/nematodes/nematodes.htm