Crocuses like the ones below which are currently blooming in my strawberry patch only seem to open in the bright sunlight. That can make taking their picture kind of tough unless you have a neutral density filter to reduce the light entering the lens. An alternative solution, especially with tiny flowers such as these, is to simply block the light with your body, an object, or someone else. The crocuses will stay open, since you are only blocking the direct sunlight for a short period of time, and you have your shot.
Canon 5D Mark II
82mm - ISO 500