What technique is used in vegetative designs to position flowers and foliage as they would grow naturally?

Accomplished by techniques such as clustering, layering, terracing and pave and is typically employed in parallel systems and vegetative designs.

Explanation:

well seeing i am an artist and i actually did a self portrait; i will describe how i painted it.   i used acrylic on a stretch canvas about 4 feet wide by 6 feet tall. i painted myself smiling in a soft pink long dress, white tile floor sitting on a white couch with a table behind and a vase of gorgeous flowers.   i also had a round white hat with a soft pink ribbon through it laying on the floor and on the table behind me was a lit candle. i kept it simple but soft and romantic.