Awasome Black Eyed Susan Light Requirements References. Web the african type can be planted when the soil temperature reaches 60℉ (15.5℃). These vibrant yellow flowers require at least six hours of direct sunlight daily for optimal.
Web black eyed susans (rudbeckia hirta) thrive in full to partial sun conditions. Web understanding the sun requirements for black eyed susans: These vibrant yellow flowers require at least six hours of direct sunlight daily for optimal.
