Using fertilizers too frequently can inhibit blossoming. Bougainvillea arborea is a thornless and fragrant species. Bougainvillea arborea is a thornless and fragrant species. The clusters would lose their color and fade to a light tan and become very paper-like. Plugs are starter plants with approximately 1” in diameter by 1 ¼+” deep roots in plastic cups.    This plant flowers in a small as a 4" pot and is great for landscapes and patio containers. I trimmed it up to reshape it and it grew back even fuller than before. A thornless variety, //-->