Ive done it again!

I was just staring at my U. sandersonii 'blue' kinda irritated that it keeps sending up aerial stolons and I noticed a flower scape!!! now, this is a plant I obtained from a different source than the first one I flowered, its kept in a different terrarium and treated completly different than the first one I flowered...but!

I think I know why it flowered!! a couple weeks ago I was irritated by the aerial stolons so I just burried the entire plant under 1/4" of soil... the plant imediatly sent up hundreds of new leaves and now a flower scape

and I just remember I have a pot of U. sandersonii 'blue' in the refrigerator, I wonder if its been there long enough to have any effect on the plant

I wonder what I have to do to get my graminifolia to flower