Thank you for your help and suggestions!

Since the name Miracle Grow keeps coming up I have a different
question.

What would be the best way to feed the roses? I ask this due to all
my roses get early morning to late afternoon sun and I don't want to
burn any leaves. However, if I wait until the sun is over our house
then it's to late in the day to spray the leaves due to I'm afraid of
black spot. Would it be better to water the roses at the base in the
late afternoon with a Miracle Grow mixture or what about mixing
Miracle Grow straight into the soil and then watering the bushes?

I'll get a test kit tomorrow and again thank you for your help!