I love everything about Wilson Spider and it has grown to a nice sized clump since I got it in 2014. It is definitely a mid-season bloomer for me since it blooms all through the month of July.
One thing that I noticed and that I don't understand is that Wilson Spider is registered as a bitone. I do not see any color difference between the petals and sepals, but maybe it is a very slight difference. Maybe someone could help me out with understanding how this is a bitone.
Here it is in 2017, still only about 4 or 6 fans.
But by 2020, it really grew into a wonderful clump. I just love how multiple blooms of it opened at the same time. It is registered at 28 inches and I believe that is how tall it gets in my garden. In this picture, I have 'Hot Pepper' (Joiner, 1993) right in front of it. Hot Pepper is registered as 20 inches. Behind Wilson Spider is 'Lemon Lime Swirl' (Herrington-K, 2006) that is registered at 36 inches.
This shows a spent scape just left of the bloom from 2018 with 3-way branching. Most scapes probably get between 10 and 15 buds.
Here is a picture of the back side of the clump taken on 7-14-19. This shows the branching, mostly 2-3 way.
Same day, 7-14-19, but from the front of the clump. Probably one of my favorite pictures of WS.
This picture was taken on 7-15-19 at 5 pm. I think the color holds up very nicely although I have seen some edges that were a little dull and curled.