Tall, healthy shastas but no blooms. 3 different locations in yard, leaves look great, a tight whorl on top where the flower should form of a lighter green. All the plants receive lots of sun with a little shade from other plants at different times of the day. I have added phosphate to encourage blooms to no avail.
Non Blooming Shasta Daisies
Certified GKH Gardening Expert
Other than having an abundance of nitrogen in the soil, which is normally offset with phosphorus, I really don't know what else would be keeping the plants from blooming. You may need to get a soil test to see exactly what, if anything, needs to be corrected as far as nutrients go, but the addition of bone meal shouldn't hurt.