That is a term that we do not hear much. There are not many plants that it applies to. Cyclamen is one of the more familiar plants that is summer deciduous. It is from a climate with reasonably mild winters and unpleasantly dry and warm summers. Just like most deciduous plants are dormant through winter to avoid the unpleasantries of the weather, cyclamen defoliates as the weather gets warm in early summer to avoid the expected heat and aridity. It somehow knows how to stay dormant until the weather starts to get cooler in autumn, and is ready to regenerate new foliage and bloom as the rain starts. The active growing season is through autumn, winter and into spring. It is all a matter of taking advantage of the weather while it can, and avoiding the discomforts of severe weather when necessary.
Rhody, like most dogs, has been shedding his fluffier inner winter coat through spring. He still seems to be too fluffy for the weather, but he must know what he is doing. The remaining wiry outer coat provides a bit of shade, and helps to dissipate a bit of warmth when necessary.
Unlike Rhody, I do not have a fluffier undercoat to shed. All that I could do is shed some of the sparse and wiry outer coat. It might have provided shade, but also interfered with cooling air circulation. It does not seem to be designed to dissipate heat like Rhody’s is. Regardless, it was shed just before the Summer Solstice, and will not regenerate until autumn. A barber sheared back the upper evergreen growth first. I then pollarded most of the lower growth, leaving only a pair of formally shorn hedges flanking the upper margin. They too may be removed soon. Antithetically of https://tonytomeo.wordpress.com/2018/01/17/winter-coat/