To tell you the truth, I'm not very good with nature photography, but these are a few tips I've learned over the years.
Tip 1: Have a good camera. They say the best camera to have is the one you have.
Tip 2: Know your subject. If you have a knowledge of flowers then chances are you'll know what makes a great picture!
Tip 3: Check your surroundings. That's right, make sure you're in a photography-allowed place. Obviously, if you're outside, no problem! But if there are signs that say "No pictures please", then don't take pictures!
Tip 4: Check the time. Some photographers don't pay any attention to the time. What do I mean? Well, normally photo-taking is forbidden around noon time and early afternoon. The light is harsh, and doesn't make for good pictures. However, if you know how to play with the light, and have specific knowledge about the light, shoot for the stars!! No, not in broad daylight!!
Tip 5: Include other people. If you have your family with you, ask them if they want to be part of the picture! I say "ask" because not everyone wants their picture taken, whether or not it's along with someone else. The reason for having other people in the photos adds some interest to the photos. Studies have shown that when a person looks at just a photo, they are more likely to skim over the photo than if it has people in the photo. The reason? If a person sees a photo, they are drawn to the photo itself, but when they see people in it, they are more likely, by 65%, to look at the photo longer. They wonder what that person or group of people are doing. Therefore they look at the picture longer.