I'm sorry but yes, you have to comply. Anytime you live in an association run housing complex. You and everyone else has to abide by the rules. the rules are basically set up to keep everyone from ruining the basic continuity and beauty of the landscaping, etc.
Now you could decide to go to the next association meeting and bring up that you'd like to have flower pots and could they amend the by-laws. A great way to get that done is to have your neighbors sign a petition to allow that to go on. Just know that if you neighbor across the way decides to put the largest ugliest plant and pot near your property- you won't be able to stop them...Lisa