can I?

im growing my plants out side and i was wondering if their was a way to make the plants go into flowing stage when i want to keep them a cirtan highth ..

can i put a unbralla or somthing over them during day to make it like days r changing?

no that wont work, they need to be in complete darkness for the buds to grow. If u use the umbrella the plant will just strech to get the light

if its height ur worried about U can always top the plants to keep them from stretching. otherwise youd have to plant the plants in pots, take them outside everyday for 12 hrs, then put them in a dark closet for 12 hrs everyday.