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Protecting Pole Beans from Rodents?After a few years of delicious crops, my purple pole beans were discovered by, I suspect, both squirrels and tree rats. Now a few years later, I want to try again in a shallow raised box with a 2x2 or bamboo pole structure and 1/4" fine black garden netting over this. I realize metal mesh, "hardware cloth" might be more rodent proof, but it is expensive. How successful is this plan likely to be?