Sorting to locate all the outside border pieces, while....
Placing the pieces into the 'general-color' piles.
Then I carried on with a second round of sorting (similar colors sorted by shades/patterns) while placing the pieces flat out on the poster boards.
I really was not sure where or how to start this image but as you can see below I started with the brightest orange/yellows and lightest greens and the deepest reds. I continued with the brightest yellows and the light pink/dark red flower.
I don't know flowers so I cannot give them names but I think the orange ones are Tiger Lilies (I could be wrong). I had to identify the pink flowers by their patterns which was doable but tricky. The background 'sprigs' (I'm calling them) which are the whitish colors were fairly easy. That left the dark green patches which were assisted by the shapes of the pieces. Thank goodness for the shapes of the pieces!
The following 4 images gives a little bit closer look at the rich beauty on this Solstice Flowers which is what was the real attraction to this custom jigsaw puzzles
Wondering what Solstice means? "A solstice is an event occurring when the Sun appears to reach its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around June 21 and December 21. The seasons of the year are directly connected to both the solstices and the equinoxes." (as per Wikipedia).
The size of the puzzle seems massive when looking at the assembled pieces and doing the usual 20" x 30" puzzles but truly can be appreciated. And when images such as this one are being assembled I find the shapes of the pieces are very helpful. The quality thickness of the pieces keeps the puzzle together so well that the whole image can be picked up and not fall apart. That said, the puzzle must be taken apart mostly piece by piece very carefully....and I'm ok with that!