Hello there Rush2112,
Good job in using Canna nutes with a constant pH between 6.2-6.5! Rehabilitate your soil a bit with Canna Flush. After that try using a slightly higher dose of Canna Flores (contains calmag) for a while with a 10-30% water run-off. It would be great if you have the Canna Calmag agent available! In that case, use it as a supplement instead and continue with the regular canna Flores schedule.
Good luck with your project, I wish you all the best! 👽