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#1 - awesomechardey
Reply -1
(01/28/2013) [-]
Because they grow "away" from gravity.
#5 to #1 - thepastryistrue
Reply +59
(01/28/2013) [-]
wrong. They grow towards the light.
#155 to #5 - awesomechardey
Reply +1
(01/29/2013) [-]
So tell me, how do they know, wich way to grow, when they are still underneath earth surface?
#77 to #5 - ningyoaijin
Reply +2
(01/29/2013) [-]
Actually, plants do display gravitational tropism in addition to that withe regards to light. Plants grown in the dark still grow upwards, for the short time they survive.
#73 to #5 - Fallenurc
Reply +1
(01/29/2013) [-]
Only small amounts of plants grow towards light.

Phototropism isn't the only tropism that exists. Some grow towards light, away from light and also grow towards as well as away from gravity (Geotropism). There is also thermotropism, thigmotropism.

#14 to #5 - popkornking
Reply +1
(01/29/2013) [-]
wrong. They do both.
#63 to #14 - whysodamnserious **User deleted account**
-2
has deleted their comment [-]
#70 to #63 - popkornking
Reply -1
(01/29/2013) [-]
They do all, they're 6th dimensional
#9 to #5 - anon
Reply 0
(01/28/2013) [-]
If they're underground they know to grow up away from gravity so they do technically do that too.
#10 to #9 - thepastryistrue
Reply +1
(01/28/2013) [-]
Technically that's right. Plants even react to mechanical stimulus (like climbing plants that react to mechanical resistance by changing the direction in which they grow).
Plants are pretty ******* awesome, if you think of it this way...
#2 to #1 - toggme
Reply -5
(01/28/2013) [-]
You know... no one asked..