What does the packet mean when it says..?

"Pinch off stem tips once in early summer to encourage bushy growth"


This is an Aster (Crego Mix) flower... so, is the packet right? and what do i do?

What does the packet mean when it says..?
Hey Kendall,





After the plant begins to grow and has several levels of leaves, pinch the top leaves (little ones) off. Essentially you will be pruning the plant to encourage growth in the lower parts of the plant, to make it more bushy. This really works.
Reply:Break off the top ends of the plant so it will grow bushier instead of long and leggy.
Reply:You pinch off the center or main stem above several side branches an it will force even more side branches. Hence, more branches...........more flowers.
Reply:When a stem grows, it grows out of the tip of the stem and extends itself. When you want to encourage growth out of the side of the stem, pinch off (literally, with your finger tips) the growing end of the stem. This will stop the lengthwise growth and cause shoots to grow out of the sides of the stem.
Reply:nipping off a tiny bit with a few leaves from the growing tip of a seedling after it has put on some growth ,stops vertical spindly growth,in next to no time many lateral or side shoots appear,this makes your plant busy %26amp; gives you the opportunity of a good display of flowers,each branch will bear flowers ,so there,the packet has been right all along .