I can't keep hold of my plants flowering.? I think I hold a black thumb. All the flowers...

I think I hold a black thumb. All the flowers die off of my plants inwardly a few days of purchase. I got some lillies, gerbera daisies, hydrangeas and some fluerette mums roughly a week ago and none of them have flowers vanished. The green parts are healthy. What am I doing wrong?

Also, I purchased them from differents stores.
Answers:    it help to wear gloves when handleing certain plants cuase if finger grease comes of your skin and touchs the leaves or stems it kills the flowers cuase the other afternoon i was transplanting my lillies i forgot to wear my gloves and i touched the plant when i be transplanting i noticed that the subsequent day my flowers be dead or even starting to die
There are lots of reason for this. Most flower plants are either import or "forced" under artificial conditions such as steam and 24 hour light. When they bloom they are removed and sold to stores. They do look extremely nice, and that is why you buy them. My suggestion is, do not buy a plant in bloom, buy them within bud. The chances are that these enjoy been contained by bloom for quite a long time until that time you bought it, and therefore nearing it's failure. just depart them now, the Dasies and the Mums and the Lily's will die down in a minute, the hydrangea's will take for a time longer. Plant them into the garden and leave them. Next season these will come again, nurture them once a week from the time they begin to bud, and after you will have the pleasure of the plants contained by all their glory. Handling these will NOT assassinate them Good luck