This map shows the overall suitability of this crop in the state of Illinois.
Overall Suitability Map
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Lactuca sativa var. longifolia

Common Name(s): Romaine lettuce
Family: Asteraceae
Growth Habit: Func. Annual/Biennial
Growing Days: 80 to 130 (days)
Abs.Max=86° (F)    Opt.Max=64° (F)
Opt.Min=46° (F)    Abs.Min=43° (F)
Precipitation: 43 to 55 (in.)
Winter Minimum:
Soil pH: 6.7 to 7.4
Soil Texture/Type: Light sandy loam; silt loam
Soil Drainage: Well
Photoperiod Response:
Light Intensity:
Not frost tender. Dislikes acid conditions. Must protect from slugs and aphids.
Rust, Powdery Mildew
Food - vegetable


Geographical Origin:
Only cultivated
Metric Units

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Last Modified: October 17, 2012
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