what is internodes on a plant

hi guys

well im wondering when to start flowering my plants. im growing big stone right now and on planet skunk it said you should start flowering when you have 4-7 internodes

so please help me out

my biggest plant is 8in really bulky.


so please tell me what that means and how big should my plants be before i start to flower.

thanks
cali-high

Here is a picture of nodes, thanks to Garden Knowm:
https://www.rollitup.org/marijuana-pics/index.php?n=289

your plants will double to triple in size, alot of people flower at 12 inches. depends on your preference and space, i flowered at 8-12 inches on my four ladies, and this is what they look like on day 26 for flowering.