Here is the Trigger Crisphead lettuce, Lactuca sativa. This superb Calmar-type iceberg lettuce is right on target. It has shown high tolerance to cold as well as moderate ability to withstand heat while reluctance to succumb to BOR even when left overcrowded under difficult conditions of excessive rainfall. Head size can range from 4 to 10 inches round and can be peeled off leaf by leaf for salads as the head grows. It is very crinkly toothed leaves fold into tight, tight hard medium-green heads without give. An excellent alternative to iceberg lettuce. They grow best in cool weather with medium moisture. Use shade cloth to keep summer lettuce tender and sweet longer. Open pollinated 65 to 75 days.

Trigger Crisphead Lettuce

SKU: 9100-50
$1.99Price
  • Quantity 50 seeds

    50 seeds

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  • GERMINATION INFO

    1) Prepare for planting. Sprout tomato seeds in small containers, preferably 4" or smaller. In-ground germination is not recommended. Use a standard potting mix that is well drained. Start seeds in containers approximately 8 weeks prior to the planned set-out date. Plants should ultimately be transplanted to the garden 1-2 weeks after the expected date of last frost.
    2) Plant seeds. Plant seeds 1/4" deep in the soil. Cover with soil and water carefully. Overwatering can cause fungal growth which leads to seed rot. Excess water can also bury seeds deep in the soil where they will not be able break the surface. Water when the soil surface just begins to dry. Multiple seeds can be planted in a single starter container, but should be thinned once seedlings appear so only a single plant remains. Seeds do not require light for germination but some light source should be provided for seedlings once they emerge from the soil.
    3) Germination. Soil should be kept consistently warm, from 70-85F. Cool soils, below about 60-65F, even just at night, will significantly delay or inhibit germination. Hot soils above 95F will also inhibit germination.
    4) Care of seedlings. Once a few true leaves have developed, seedlings should be slowly moved outside (if sprouted indoors) to ambient light. Care should be taken not to expose seedlings to direct, scorching sun so plants may need to be hardened off via slow sun exposure. Hardening off can be done using a shaded or filtered light location, as well as protection from strong winds, rain or low humidity. Hardening off time varies, but can take 5-10 days.
    5) Planting out. Plant in the ground once danger of frost has past and daytime temperatures consistently reach 65F. Plants can be spaced as close as 24" apart. Germination time: 1-3 weeks under ideal conditions.
     

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