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Try cutting off some of theTry cutting off some of the leaves and on some of the other leaves, take a very stiff switch or stick and hit the leaf stem to the point of damaging the stem. The plant will send up a substance to repair the damage. You will see a "knot" form around the damaged area like a sling of sorts, and then look for those blooms to apear. Try this on a FEW of your plants and see if they don't do much better than the others.. It works in Western Arkansas, and it probably will work where you are.