Your plants look nice but they seem to be a little small for how old they are but sometimes pictures do no justice for size. What is your soil and are you using any nutes?

What size are the pots they're in?

"Morbidangel" makes a great point with the soil. You should fill your pots up higher because the root system will not grow within a couple inches of the top of the dirt.

Here's what a normal root system will look like