Hmm...practice makes perfect Geoff?
Here's how I can explain it with a few examples (none of which are in my garden this fine May 1st, but from previous years)
Try to achieve super clear focus.
Composition. Try to start and end the photo at natural points, nature does this for me with the tips of these lily petals.
Rhythm. Notice how the eye is kept busy going around and around the curves of this Fungi?
Balance. Simplicity always works best and the stalk is needed to balance the flowerhead.
Get down on yer knees
Think of different angles to offer interest.
Hope that helps
P.S. Missed one of my favourites. Texture. Not only do we all love Scabiosa because of its pin cushion heads, but in this photo the petals are almost like blobs of watercolour, in my eye anyhow.