Yes, but they first need to be at a maturity level that will allow them to continue ripening after harvest. I suggest you harvest all summer squash before the first frost and store in a cool dry spot. It helps with squash storage if you leave about 2 inches of stem on the fruit when you harvest. Try not to cut or bruise the skin when transporting as this is where infection can enter. Enjoy your harvest, Keep growing, Marianne Binetti