Creating a photo log of the back hill

By far the biggest garden we have is on the hill in the backyard.  There are numerous other bits and pieces around the house, but the back hill is the biggest continuous bed.  I've been taking pictures of sections of it for years, but last summer started stitching together some of the sequences to create panoramic scenes of the whole hill.

This year I'm taking the panoramic scenes a step further and creating a series of pictures over time to show the garden as it grows through the season.  So far I have three pictures and have put them together in a sequences collage.

 The top picture is mid-April right after I had spent a weekend putting down the mulch.  I was not very careful in overlapping the original pictures, so the stitching did not work well.  It's actually two different stitched images placed next to each other.  The center image is late April, and the third one is mid-May (then there is room for several more to be added later.)

Here are the images separately - to see more detail.

<-- 2 pictures Mid April

 Mid April 3 pictures ->

Late April

And today (mid-May)

Since I'm still learning what I'm doing out there, this will give me a chance to see what is blooming when. So next year I'll have a quick reference guide that is very specifically tailored to my garden.

Now I am going to ask for help.  I have several plants that I don't know what they are (so I'm not sure what to do for them.)  Here is a gallery of pictures.  If you know what these are, please leave a comment and tell me. I'll group them by numbers to make it easier to keep track.

Plant 1 - along the garden path in several spots - getting to about 12 -18 inches tall

Plant 2 in the center left of the hill - lots of sun

Plant 3 - at the far right on the hill - plenty of full sun.

Plant 4 - ground cover - mostly behind the crimson barberry in the center behind the arbor. 

If you know what these are - please leave a comment and let me know so that I'll know how to care for them.