Q.My Sea Holly Had Small Worms In Center Of Cones And Never Finished Blooming, Dish Soap And Water Mixture Didn’t Work. What Can
I do next year. The rest of the plant did great, good color lots of leaves and by the way I started plant from seed in spring. It also has some new shoots starting.

Certified GKH Gardening Expert
It will be best to use an insecticide. These articles will help:
https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides
This article will help you with the care of the plant:
https://www.gardeningknowhow.com/ornamental/flowers/sea-holly/sea-holly-flowers.htm