Correction for the speed of Grass growing
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How fast is 150 kilometers per hour?
It's about 1,000,000,000 times as fast as Grass growing
The speed of Grass growing is about 0.000000140 kilometers per hour.
(for Kentucky Bluegrass, Poa pratensis) (a.k.a. Smooth Meadow grass, a.k.a. Common Meadow grass) (Summer months, ideal growing conditions)
Kentucky Bluegrass, one of the most common grasses in North America, grows about 0.000000150 kilometers per hour in the summer months under ideal conditions. When left un-mowed, Kentucky Bluegrass grows to heights of 60 to 90 cm (2 to 3 ft) and blossoms with a blue flower.