As Dillard said, there is a lot of variation with beans; I don't think it's too cold for yours at this point, but I would lay off the fertilizer. I'm obviously farther north than you are, but for comparison I usually plant my bean seeds at the beginning of June, and don't start harvesting my main crop of pole beans until early August. Just keep them watered and they will likely grow and flower in their own time; if you want earlier beans, plant some bush beans.
