Re: slow growth and no pups
you didn't say what type of banana.
most bananas do not pup that small.
wood ash in ground underneath or on the side is excellent you do not have to worry about how much you use generally. now their in the ground post hole 4 to 5 inches from the plant about a foot and fill with wood ash to the top.
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npk of wood ash 0/1/3 to 0/3/7
npk of banana leaf ash 1.75/0.75/0.5
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