Lactuca sativa (50 days) Open pollinated. Dark green outer leaves with broad mid-ribs and a creamy white center heart. Slow to bolt. Excellent flavor. Bestseller.
Lactuca sativa (50 days) Open pollinated. Dark green outer leaves with broad mid-ribs and a creamy white center heart. Slow to bolt. Excellent flavor. Bestseller.
Lactuca sativa (50 days) Open pollinated. Heirloom. Red butterhead. Dark green butterhead base is fully blushed carmine and pebbled with bronze and brown.
Lactuca sativa (48 days) Open pollinated. Compact tight uniform heads form upright rosettes for a clean market and salad harvest. Pebbled leaves shaded red and light plum on a green base.
Lactuca sativa (58 days) Open pollinated. Thick medium-green leaves make a tight well-developed heart. Holds well in the field, a standout both for commercial growers and home gardeners.
Lactuca sativa (55 days) Open pollinated. German heirloom. Elegant loose softball-sized green butterhead lettuce with light brown pebbling on leaves. Excellent flavor and bolt resistance.
Lactuca sativa (55 days) Open pollinated. Heirloom. Very attractive bibb lettuce has apple-green leaves splashed with maroon-red flecks. Selected for resistance to tip burn.
Lactuca sativa (52 days) Open pollinated. Large fancy fast-growing light-green butterhead lettuce. Bolts quickly in heat. Recommended for fall or overwintering where climate permits.
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Lettuce
700–1100 seeds/g.
Days to maturity are from emergence after direct sowing; for transplants, subtract 20 days.
Culture: Direct seed outdoors as soon as ground can be worked and repeat every 2 weeks for continuous supply. Or start indoors in March and at regular intervals thereafter for early transplanted successions. Optimal germination temperature range 40–70° though many varieties won’t germinate in soil temps above 75° and most shut down above 80°. Thin sowings frequently and ruthlessly to a final distance of 1' for full heads. Heavy nitrogen feeders.
Hardy. All save icebergs tolerate heavy frost. Fall and overwintered harvests are becoming standard practice. For summer harvest, select varieties carefully: bolting, bottom rot and tipburn are problems if a variety can’t take the heat! Using shade cloth can keep lettuce tender and sweet longer into summer. Sesquiterpene lactones produced in the latex render lettuce bitter when it bolts.
Saving Seed: Saving lettuce seed is easy! Leave spring-planted lettuce heads to bolt. Flowers will become white tufted seeds. Once dry on stalk, rub seeds off the plant into a paper bag. To ensure true-to-type seed, separate lettuce varieties by 10 feet.
Diseases:
BOR: Bottom Rot
DM: Downy Mildew
LMV: Lettuce Mosaic Virus
PM: Powdery Mildew
SC: Sclerotinia
TB: Tipburn
X: Xanthemonas
Pest: Aster Leafhopper (vector for Aster Yellows disease) Cultural controls: control perennial broadleaf weeds near lettuce plantings, plow lettuce fields immediately after harvest.
Pest: Slug Cultural controls: avoid mulch or nearby grassy areas. Material: Sluggo
Disease: Bottom Rot Cultural controls: rotate with grass-family green manures, plant in well-drained soil or on raised beds, more upright varieties escape infection.
Major Diseases: Downy Mildew, Grey Mold, White Mold Cultural controls: rotation, reduce duration of leaf wetness, plant parallel to prevailing winds, use wide spacing, control weeds, use well-drained fields in spring and fall. Material controls: MilStop