cherry blossom in 12/3/17 to 30/3/17?

hi i am planning a trip with my wife and kids during 13/3/17 to 31/3/17 . want to know will i be able to see cherry blossom .

Depends on the weather and location in Japan you are visiting. But last week of March is normally okay. You can always check the forcasts and last year reports within this website for guestimations of dates.

Cherry blossoms begin to usually bloom in the end of March.
And they become in full blossom in approximately one week.
Examples are below.

Examples of blooming forecast at this time ;
Kyoto; March 28th to March 30th
Tokyo; March 22th to March 24th

Examples of full bloom forecast at this time ;
Kyoto; around April 5th
Tokyo; March 29th to April 1st

Sakura blooming report channel already started.
http://weathernews.jp/sakura/
Now all spots are blooming yet. (つぼみ:bud, 満開: full blooming)
Other famous report web open soon.

Basically blooming front(Not full blooming) coming up
from South/West to North/East also Lower to Higher ground.
So you have a lot of chances wide area in Japan west.
http://sakura.weathermap.jp/ (latest but not final forecast)
This year growing up speed seems slower now so make blooming date later than ave.
But if warmer days continued longer make speed up.
If no big changing may like 2011.
http://www.data.jma.go.jp/sakura/data/sakura003_06.html
(Use Google translate, in Japan date writing is Y/M/D.)
https://en.wikipedia.org/wiki/Date_format_by_country

Full blooming is some days later
from 1st blooming announced date( = blooming front).