21.   Blues are a challenge for Southern summer gardens, she says, because most require cool nights.

22.   A bubble of high pressure that provided a comfortably cool night to the upper Middle West will bring a sunny day with comfortable humidity.

23.   A bloom spike will form about three weeks after the spell of cool nights.

24.   But cool nights make it difficult for tannins to develop in those grapes before their sugar content gets too high.

25.   But four inches of rain in October, evenly spaced during its warm days and cool nights, broke their dormancy.

26.   But on a cool night at Houlihan Stadium last Sunday, Dungy raced off the field knowing the journey had been worth the wait.

27.   But the key there is their cool nights.

28.   Carols are sung, loudly, grandly, on a cool dark night before Christmas.

29.   Flowers will last longer with cool night temperatures.

30.   Give them dry leaves, high humidity and cool nights and they are keen to release spores.