This is my first garden, so this may be a dumb question, but I don't have the experience I need to answer it. I have some lovely pole beans growing in the garden. First, they have nearly outgrown their 6' tall trellis, what do I do when they outgrow the trellis? Also, while they appear healthy and green, they haven't flowered at all yet. Should that worry me? We lost 2 weeks off our growing season here due to cold weather and they were planted May 31st, if that info helps. Am I doing something wrong?