You may have noticed the Texas Sage bushes around town are blooming beautifully. I've always heard that the sage is a better rain predictor than any weatherman, so I decided to look into the science behind it. Here's what I found:
Texas sage (Leucophyllum frutescens), also known as Texas ranger and cenizo, produces silvery-gray foliage and ½- to 1-inch, bell-shaped, light purple flowers. Texas sage most often blooms after summer showers and does bloom repeatedly in waves from spring through fall, especially after rains moisten the soil. (homeguide - texas sage)
Hmmmm, that says AFTER a rain... back to google.
Officially known as Leucophyllum frutescens, Barometer Bush is a tough, desert-loving plant native to Texas and Mexico. Resistant to drought, foraging deer, freezes, high winds, salt spray and blazing heat, its foliage has the soft, grayish appearance of some salvias or Dusty Miller. The blossoms, ranging in color from pink to lavender, tend to appear in times of high humidity or after rain has left the soil damp and pliable – hence the name, Barometer Bush.
Because suddenly rising humidity often precedes rain in arid or semi-arid climates, the sage can be tempted to bloom just as suddenly before a rain. Depending on the degree of drought, the excitement over its flowering can be palpable.
Ah, now I get it! Bloom on Barometer bush, bloom on!