With all the rain, it is very possible that there are very few nutrients
left in the soil. Although your area is usually considered to be an 'acid
soil' region, clay is usually more toward the alkaline end of the scale. A
soil analysis is always a good idea when you are not getting the growth and
budding that is normal for your roses.

Be certain that the soil is acid before adding lime!!!!!

A water soluble food such as Miracle Grow is a quick way to get some
nutrients to the plants quickly. If the leaves are pale with dark veins
there is not enough iron available. This may be due to the pH of the soil
or simply a lack of iron and other nutrients. One of the aspects of Miracle
Grow is the micro nutrient compliment, these are essential to bud formation.
There are other water soluble foods available that are also good, just read
the label and look at the analysis.

Tim