Apparently Rain carries an ionic charge that gets grounded when it reaches the plants (or the earth) and must be beneficial somehow from the look of plants after rain (as opposed to hand watering). I do get it that ALL the plants benefit from this, weeds and rare specimens alike...
Kills me in some ways.. Good thing, that attitude needs to die apparently.
"... But I tell you: Love your enemies and pray for those who persecute you that you may be sons of your Father in Heaven. He causes the sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous. If you love those who love you, what reward have you?"