One easy technique to capture great flower pictures is to plant them in your yard. This will allow you to photograph the flowers when they are budding, to blooming, to losing their luster at anytime during the day without ever having to leave your yard. Having the ability to take the pictures from dusk to dawn allows you to capture interesting native insects that may be hiding among the petals or feeding on the nectar.
All you have to do is walk outside and snap away. Heck, you can even take the pictures in your pajamas. Not only will you capture some great pictures, you have the added bonus of enjoying the pretty flowers in your backyard.
This image was taken on the side of my garage using a background i had to hide the siding.