Schefflera prefers bright, indirect light. In the summer, move potted plants outside where they will receive bright light but not direct sun, such as under a patio cover. A Schefflera plant that gets leggy or floppy might not be receiving enough light. Never place a Schefflera houseplant in direct, full sun because intense sun can burn the leaves.
Water weekly during the growing season and spray the leaves frequently. You can wait until the soil in the pot dries out and then thoroughly soak the soil when you water. Cut back on water during winter. Often, people will overwater a Schefflera plant and doing so will eventually kill it. Yellow and dropped leaves is a sign that you might be watering too much.