Answer: It is possible that the intervening colder and wetter weather caused the seeds to rot. Cucumbers germinate at soil temperatures of between 65 and 105 degrees, with 95 technically being optimum. That is not practical in the home garden, so normally we aim for about a minimum 70 degree soil temperature. The rulke of thumb is t plant the seeds about two weeks after the last average frost date, but this year's weather has been very unusual.
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