Answer: You can pick bush beans as soon as they are large enough to eat, say four or five inches in length. You want to pick them often to keep them in production -- if the beans are allowed to stay on the bush too long, the plant will stop blooming. Regular harvests promote more blooms, which means a longer, bigger harveset. Also, smaller beans are more tender and tend to be sweeter. If they stay on the plant until they look knobby and the seeds inside swell, then they will be tough and have a bland flavor.
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