I bought a bouquet of Gerbera daisies. For some reason the flowers start to bend over (maybe b/c of the weight) and eventually the stem kinda snaps causing the flower to die. On another website I read that Gerbera daisies last 14 days (mine died after 7). The website also so said to replace teh water after 4-5 days and trim the stems. I did this and that's when Gerbera daisies started dying, before that they were fine. I bought another bouquet this weekend but I don't want to make the same mistake. I already the flower is starting to bend but I straightened it out to prevent it from bending further. Ideas?