I had central heat/air system installed this past December. The A/C unit is sitting underneath a small camellia tree outside my house. The flowers are blooming and dropping on the unit. Should I cover the unit? I researched online and read pros and cons... appreciate with any advice.

Provided the outdoor unit isn't a heat pump, the cover isn't a bad idea, if only the top. Leave the sides open to assure ventilation and prevent mildew or rusting. Make d@mn sure you remove it before operating the a/c.