Night shooting skills

The equipment and techniques that you use will depend a lot on what you want to do with the final image. If this is just for yourself (not looking to sell the images) then a DSLR that can achieve high ISO with low noise should do the trick. If you are after higher quality images, then even with a high ISO/low noise DSLR, you are going to want to use a tripod and a remote release so you can use lower ISO factors. You want to control your environment as much as possible; when lowering ISO factors, exposure time goes up. If there is wind, or anything that makes the plant move, you are going to get blurring in the image, so that must be considered. If you add artificial light that will lower the exposure time, but you want to light to the effect you want to achieve. Using direct light on the flower will illuminate it, but the greenery will not expose properly. A more diffuse light will get you a more balanced image. In any case you want to use the fastest glass (low F number) that you have. Low F numbers increase light to the sensor, which is very helpful in night scenes, just remember that low F numbers also mean shallow depth-of-field.