Home > Vegetables > Lettuce > Butterhead/Boston > Green
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Product ID: 437
Ermosa
(Lactuca sativa)
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The first dark green butterhead lettuce with heat tolerance.
Top-rated in Midwest trials. Ermosa is strong against tipburn and bolting, and resistant to DM races 1-7 & 10 as well as LMV. Excellent quality. Also available pelleted. Packet: 800 seeds.
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Days to Maturity or Bloom: 48
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Diseases Explained:
| MT0-10 |
10,000 seeds were tested for the presence of lettuce mosaic virus and none was found. |
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Growing Information:
CULTURE: Lettuce is hardy and can be planted as early as the soil can be worked. It is a cool weather crop and makes its best growth at temperatures of 60-65°F (16-18°C). Careful variety selection is important for hot weather crops. Sow every 3 weeks for a continuous supply of fresh lettuce. THERMAL DORMANCY: Lettuce can be dormant at high temperatures. For best germination results sow at soil temperatures of 68°F (20°C) or lower. The priming process in pelleted lettuce seeds broadens the temperature range in which the seeds will germinate, overcoming some of a lot's thermal dormancy. TRANSPLANTING: Sow in flats, 4 seeds/in., or in 3/4" plug trays, barely covering seeds with fine vermiculite, 3-4 weeks before transplanting outdoors. Shade the flats on sunny, warm days if necessary to keep the soil surface cool, below 75°F (24°C), until germination. If sowing into flats, transplant 1-2" apart into flats, pots, or cell-type containers about 2 weeks later. Harden seedlings by reducing water and temperature for 2-3 days before planting outdoors. Properly hardened transplants can survive temperatures as low as 20°F (-6°C). Transplant iceberg lettuce 12" apart in rows 18" apart, other types 8-12" x 12-18" apart. DIRECT SEEDING: Seeds germinate even at low, 40°F (4°C), soil temperature, but poorly above 75-85°F (24-29°C) depending on the variety and seed lot. Cover seed lightly, about 1/8", and firm soil gently. Dry soil must be watered to ensure coolness and moisture, and for even germination. Thin young seedlings to one plant per spot. For salad mix: sow in a 2-4" wide band, about 60 seeds/ft. MT0 SEEDS: A variety name followed by MT0-10 indicates that the seeds offered for sale in sizes larger than a packet have been tested for the presence of lettuce mosaic virus and that no LMV was found in a sample of 10,000 seeds or less. MT0-30 indicates that no LMV was found in a sample of 30,000 seeds tested. NOTE: A disease-free test result does not guarantee a seedlot to be disease-free, only that in the sample tested, the pathogen targeted was not found. DAYS TO MATURITY: For full-size heads from direct seeding and growth in mild temperatures; subtract 10-14 days if transplanting. Note: maturity can be 3 or more weeks later in cool weather, and up to 1 week earlier in hot weather. AVG. DIRECT SEEDING RATE: For full-size heads (precision seeded): 5,300'/oz., 220'/1,000 seeds, 5.5 oz./acre at 3 seeds every 8" in rows 18" apart. For salad mix: 400'/oz., 16'/1,000 seeds, 6,400'/lb. At 60 seeds/ft. TRANSPLANTS: Avg. 20,000 plants/oz. SEED SPECS: SEEDS/OZ.: 20,000-30,000 (avg. 24,000). MINI: 0.5 gm. unless otherwise noted (avg. 400 seeds, sows about 17' at 24 seeds/ft., or makes 250 transplants). PACKET: 1 gm. unless otherwise noted (avg. 800 seeds, sows 34' or makes about 480 plants). |
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Symbols Explained:
| B |
Product is on Backorder
Items identified with this symbol are on backorder.
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JSS Specialty/Exclusive
This seed could be unique or hard to find and may be sold exclusively by Johnny's. |
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