Marigold

How far apart to plant marigolds, how many fit your bed, when to plant them and how many you need.

In the row
8 to 10 in
Per square foot
4
Planting depth
0.25 in
Start indoors
4 to 6 weeks before last frost
Plant out
0 weeks after last frost
Sow outdoors
0 weeks after last frost

How many fit a raised bed

BedAt 9 in spacingSquare foot method
4 x 4 ft2564
4 x 8 ft50128
3 x 6 ft3272

Square grid with half the spacing kept clear at the bed edges.

Space French marigolds 8 to 10 inches apart and the larger African marigolds 12 to 16 inches.

Plant after the last spring frost; seed started indoors at 70 to 75 °F germinates in 5 to 7 days.

Sources