I recently purchased 3 luna hibiscus from Lowes since some herbicide drift took out my other three. The plants are a deep green, no yellow leaves and seem really healthy. Since the flowers are blooming I've noticed that they is no yellow pollen, making the stamen/pistol look black, there is also no little pads as the end of them. Sorry if the technical terms aren't right I am still learning. I am hoping it works itself out as it continues to bloom or even next year when it returns - as I think this is what makes a hibiscus such a beautiful and unique flower. Should I be doing anything special to potentially correct this.