How deep a planter do I need to grow ivy and ferns in?

For growing ivy and ferns, a planter that is at least 6 to 12 inches deep is generally sufficient. This depth allows for adequate root growth and drainage while preventing waterlogged soil. Ensure the planter has drainage holes to maintain healthy moisture levels, as both plants prefer well-draining soil. Additionally, consider the width of the planter to accommodate the spreading nature of ivy and the root systems of ferns.