From The Buffalo Seed Company:
"MARIGOLD (Tagetes erecta)
DESCRIPTION—This gorgeous white cream-colored marigold is a rare one! The story is that it took Burpee Seed Company over 50 years to get their hands on this beauty. It is sure to pop in the garden. The flower color can range from white to light yellow. Photo by Sara Worcester.
GROWING INSTRUCTIONS—Direct seeded. After the last frost, sow three seeds 1/4" deep every 6" in rows 12" apart or scatter on top and rake seeds in."