Something to keep in mind is that these plants grow very slowly. Some of them can live for decades, and grow on a scale measured in that time. My Lady Luck produces a new leaf every week or two, at most. This time of year it's more like one a month, or no growth at all until it warms up in spring.
I've never heard of a nep where the growth was visible every day, on a day to day basis - maybe the final stages of a leaf opening up, but that's about it.