Compare it to the one from Cambridge in Colour which has been thoroughly tested and documented before it was published.

But the numbers may not tell you anything useful if you are using a camera with a 1" sensor or smaller. That's so small that you can't see anything beyond the DOF (out of focus, OOF) unless your camera was very close to the subject and using a relatively long focal length and a very wide aperture.

A more extreme situation is when you use a smartphone which has an even smaller sensor. Despite the apparent wide fixed aperture, it's almost impossible to see the limits of the DOF. I showed this in https://www.uglyhedgehog.com/t-805958-11.html#14598145 along with a way to compare the iPhone to full frame camera.

Another factor with very small sensors is whether you are viewing the entire original (uncropped) image from a normal viewing distance (NVD) which is about the same as the image diagonal. You might only see OOF issues if you pixel peep, which artificially brings you much closer than the NVD, and there are a lot of MP in the original image (more than 8MP).

Anything posted online, especially when it's cropped or reduced in size, can be misleading - either out of ignorance or deliberate fraud.

And as engineers, we also notice everything around us that's not working quite right and how it could hurt you if it goes seriously wrong. And since I worked for McDonnell Douglas for over 11-years, spending a lot time around aerospace engineers, you learn a lot more about airplanes and what can go wrong than you really want to know, like where to look, when boarding a plane, to see how old it is (date the airworthiness certificate was issued) or why, about 8 to 10-rows back, there's always a section of the fuselage where it looks like a window should have gone but there's nothing there.

Yes, sometimes I'm jealous of my wife as she's oblivious of everything that could go wrong around us. In her case, she only notices people's poor dental hygiene (she worked over 30-years in dental practices). I guess it could be worse, she could've worked for a proctologist

I totally agree with all that has been said so far. The choice of color for the background to contrast with the bright red flowers is perfect in my estimation. You also filled the frame without crowding the edges. That helps with visual impact. I was wondering how it would look if you cropped so that the stem entered the composition directly at the corner. Then, when I looked at the photo again, I realized that crop would put the flowers right smack in the middle and I think the way you did it with the flowers slightly off set is more impactful. Great job.