The image is from a greeting card copyright 1981 with the following credits: created by Scott Alyn and artist June Wood. The card came with seeds.
The punning didn’t stop at the cover. Inside were planting instructions:
Plant me 1/4 inch deep in early spring and every few weeks as long as weather is cool. Rows should be 15 inches apart. And remember…. “Eat more lettuce. Get Ahead!”
Of course the entire crop could bolt in warm weather. Planting early leads to good head — at least in the domain of iceberg lettuce.
And so for day 1400