Question
QUESTION: I have one rose bush that has a lot of foliage, but no flowers and another that looks sick, with white leaves.  what can I do?

ANSWER: Lots of foliage means the rose is healthy. If it is newly planted then give it time and it will bloom for you. If it is an older one, then it sounds like it is getting too much fertilizer and is making foliage at the expense of flowers. The rose with the white on has mildew and 1 tablespoon baking soda and 1 quart of water sprayed daily will solve the problem.

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QUESTION: My healthy plant is old and I have not fertilized it.  Is there anything I can put on it to stimulate the growth of flowers rather than foliage?

Answer
Roses bloom on a ratio of foliage to flowers. They need the nutrients that the leaves make to feed the flowers so lot of foliage is a good sign. You could try tomato fertilizer as that has been known to encourage roses to bloom. Just use the amount they say to use for a mature tomato plant.