Not at all dear :) Just go on ahead :) Express your feelings through the flowers :) Yes, but start with some modest white flowers and then eventually the Red Roses :) You can give white roses :) :)
Not unless you consider cutting off the genitals of another being and keeping them in an unnatural state of severed-yet-still-alive as a romantic gesture weird
Unless she knows your interested and the romantic type. Than no. But if not then it's a bit weird. But she might take it to be really cute. Just depends on how close you guys are.
You might want to ask her if she's ok. Some girls may think its cute and romantic but others might not like that to happen in the workplace or if she doesn't like you back she may feel a bit uncomfortable.
it all depends if she likes you or not. if she does like you then no its not weird at all. if she doesn't but she finds it really nice then no its not weird. if she finds it creepy weird then yes its weird. it doesn't matter what enviroment your in. if you want her go for it bro.