DIY flowers

I think it's a sign -- in the past two days I've unintentionally come across 2 separate sources of information about DIY wedding flowers. On the HGTV website, there is a video on making boutonnieres, corsages, hand-tied bouquets, and a round bouquet (using a foam holder). The boutonnieres look very manageable and I will definitely try to DIY those. The hand-tied bouqet of callas also looks very elegant and manageable and the Pick a Petal site gives me even more hope. I should probably practice beforehand though.

According to HGTV, you can make the arrangements a day, to day and a half in advance. You just have to keep the flowers in a cool place (no need to refrigerate) so this is definitely do-able. I just wonder whether I should get the flowers from the Flower District or order them online....