i have a Brassaia actinophylla (Schefflera) the top is so beautiful and full but the bottom is bare in some places. someone told me i could cut the top of and place it in soil and it will reroot itself is this true?(its about 6 feet tall)
You will need to air layer for good success. Just cutting off the top and sticking it in soil would be very risky. See propagation here.
https://www.edmonton.ca/ArtCultAttr/Schefflera.pdf
Better pics here. Click on 'Air Layering' on the right.
https://extension.missouri.edu/xplor/agguides/hort/g06560.htm