Ars800, you have some wonderful looking plants there, nice garden by the way. When we come close to the end of the growing season, or when I feel that I have a good enough amount of squashes, I take and cut off the growing tips of the runners. This allows the squashes that are already on the plant to mature, instead of more flowers (that will never in probably a million years ripen), to mature. It is getting on to the time when the plants will be slowing down growth, just happens. I have already cut off the tips of my growing vines, I have lots of squash that now can have the power of the plant put to ripening and growing them, not growing more redundant flowers and green growth. I would strongly suggest this. I also do this with my tomato plants. There won't be any more further upward growth in those either, as I know that the new flowers coming will never produce fruit. Not to be negative, but that is "intelligent" gardening.
About that powdery mildew. That comes when the nights become cool. It is just something that will inevitably happen to the curcurbits (curcurbitaceae), which are melons, squashes, cucumbers. That is one of the problems with gardening on the south coast (and many other places), the cool, moist, dewy nights. Those nights are other places too, but especially prominent on the coastal regions. You might try to spray with products, but I have always found that once that powdery mildew is there, it is there. Even more reason now to stop the forward growth of the plants to mature the ones that are already growing on the vine. I would sometimes even sacrifice the some of the small fruit that was growing so that the larger ones would have a chance to mature. Some strong advice from years of growing vegetables. I hope that you get lots of good squashes, but stop the growth as soon as you can, and get those fruit maturing!!! Have a wonderful and awesome day, CynthiaM.
About that powdery mildew. That comes when the nights become cool. It is just something that will inevitably happen to the curcurbits (curcurbitaceae), which are melons, squashes, cucumbers. That is one of the problems with gardening on the south coast (and many other places), the cool, moist, dewy nights. Those nights are other places too, but especially prominent on the coastal regions. You might try to spray with products, but I have always found that once that powdery mildew is there, it is there. Even more reason now to stop the forward growth of the plants to mature the ones that are already growing on the vine. I would sometimes even sacrifice the some of the small fruit that was growing so that the larger ones would have a chance to mature. Some strong advice from years of growing vegetables. I hope that you get lots of good squashes, but stop the growth as soon as you can, and get those fruit maturing!!! Have a wonderful and awesome day, CynthiaM.