How to grow a chia A4
 

Park your car under trees regularly, preferably ones with tiny leaves like acasia
Leave your car in the rain all winter long
Leave it out in the sun for a couple of days
When it starts to sprout at the base of the rear window, keep it moist for another week.

The baseline of the rear window on my A4 is now fully decorated with pale green sprouts. Neat, huh?

Cha Cha Cha Chia !!