when will a plant flower in michigan?

i have a plant and i need to knew when it will start to flower!!!! because I'm gonna be going away soon and i don't want to miss it.

lets see........june 21 longest day of the year and now about a minute less of daylight per day.....appx 15 hrs of daylight now soooooo.............its gonna take till mid august before theres enough "nighttime" to induce flowering. i hear outside plants are not fully flowered until late sept early oct. lived in the land of milk and honey (ann arbor-grand rapids-cheboygan) so i know it gets cold early up there. good luck bro.....and enjoy your vacation