Your Weekly Electronic Gardening Guide
Practical Horticulture for Busy People.
Lettuce (head)
About This Plant...
Family:
Asteraceae
Genus and species:
Lactuca sativa var. capitata
Growing Season:
spring and fall
Indoor Sowing...
Time needed to reach transplant size:
4-6 weeks
When to transplant to garden:
2 weeks before to 3 weeks after last spring frost
Outdoor Sowing...
When to sow outdoors:
-
Other Sowing Guidelines...
Approx. germination time:
2-14 days
Germination temp.:
40-80 degrees F.
Sowing depth:
1/8 inch
Days to maturity:
57-80 days
Transplanting Guidelines...
Spacing between plants:
10-15 inches
Spacing between rows:
16-24 inches
Growing On...
Pests:
slugs, earwigs, leaf miners, whiteflies
Diseases:
aster yellows, downy mildew, powdery mildew, white mold
Harvest:
lift entire head when firm and full sized
Growing tips:
head lettuce is less heat-tolerant than other lettuce types
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