"Mr. Brand uses no special technique to produce his images.... He doesn’t use filters, preferring his special effects to come from a reflection in water or a dramatic angle of light..."

"... rather than from software. He simply finds his subject and frames it, zooms in and then touches the screen to lock the focus where he wants it — and takes multiples of every subject to improve his odds of success."

From "It’s Time to Slow Down and Appreciate Nature’s Tiny Marvels/Grab your iPhone: Andrew Brand wants to show you a side of your garden that you’ve never seen before (and how to photograph it)" (NYT).

Some nice photos at the link — closeups of plants, insects, dew. The key is to keep looking at details and notice when there's good light. You always have your iPhone (or whatever phone), so you're fully equipped to get the photo. You just have to be there and to see.

I recommend getting out around sunrise, and not just to catch the sunrise. The light on the ground is better, and the things on the ground are always changing. Where I go, different sets of wildflowers rise up and then fade. Every week, it's different. 2 weeks ago it was milkweed. Last week it was verbena and rattlesnake master. Now, it's coneflowers and butterfly weed. But just because it's there doesn't mean you can get a good photograph of it. The light has to bless you. 

At 5:35 a.m. on July 14, 2022, the light shone on the rattlesnake master:

  

I saw these plants later in the day, and the white-green color was gone.