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Lettuce grand rapids thrive in cooler seasons. Sow the seeds at a depth of ¼ inches in an evenly moist soil. The ideal germination temperature for the seeds should range between 12-15 °C(55-60 °F). Once the soil temperature reaches above 23 °C(75 °F), the lettuce grand rapids seeds can become dormant. Thin the seedlings to a distance of 8-10’’ once you see growth. Lettuce grand rapids grow well with onions, carrots, beets, celery, dill, strawberries and cucumbers as companion plants. They can also be planted in between other taller plants to protect them from direct sun during peak sunlight.