We have all seen those stunning photographs of flowers, but are yours mediocre.
A quick tip for you, once again, get low, either shoot from the same level or from below.
While walking round we are used to the old view from above, challenge that view, show something different to your viewers, get low.
Some stunning shot you have there, my favourite is the first shot (Purple Iris).
This is such a simple tip but very effective and can also be used when photographing anything shorter than you are.