calculatemygarden
Units

Lettuce

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

Heads of lettuce spaced in rows in a raised bed, morning dew
In the row
6 to 10 in
Between rows
10 to 18 in
Per square foot
4
Planting depth
0.25 to 0.5 in
Start indoors
5 to 6 weeks before last frost
Plant out
0 weeks after last frost
Sow outdoors
2 to 3 weeks before last frost

How many fit a raised bed

BedAt 8 in spacingSquare foot method
4 x 4 ft3664
4 x 8 ft72128
3 x 6 ft3672

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

Lettuce seed germinates best at 55 to 65°F and poorly above 80°F, so sow it 2 to 3 weeks before the last frost and again for fall; summer heat turns it bitter.

Sow every 2 to 3 weeks for a steady supply of heads or salad leaves.

Lettuce calculators

Sources