Answer:
I am a word with 5 letters. Bold are the first; true are the second; playful are the third; clever are the fourth; forceful are the fifth.
Lovely and round I shine with pale light grown in the darkness a lady's delight.
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
I've been argued on my color. Without me you'll die. So many attempts on your life use me so make sure you have many of my White friends.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
Give it food and it will live, give it water and it will die.