I have been using Peters XL at about 1/4 strength 1 time per week...I hope I'm doing OK..They are looking happier anyway..Thank you Elaine I will look into those fertilizers also...I used to live about 1/2 hr from MSU...They are a huge agricultural school and have many many acres of land...They have a pretty darn good football team also....I'm an MSU fan for sure.....In fact my hat says it all