Question
QUESTION:      What is the correct soil pH for a rosebed? How do you raise or lower the pH of the rosebed soil? How does soil pH and fertilizer relate to each other?   

    The weather here is starting to cool down (85 to 95 degrees). Should I cut down watering to every other day now?  I am keeping the roots damp and the past few days have been partly cloudy.

    When should I be concerned about overwatering the rosebushes? Or, given the condition of my bushes, should I keep watering full blast until it is truly fall? How do you know when roses have been overwatered?

The less sun intensity, the less water needed?

ANSWER: The correct soil for a rose bed varies from 5.5 ph to 7.0 ph but 6.5 ph is considered ideal.  In normal, not high heat weather, roses required about 5 gallons of water every 5 days. That is roughly the equivalent of a bucket of water. Rose bushes prefer to have one large gulp of water instead of many smaller sips. The soil should be kept damp but not too wet as this can suffocate the frail feeder roots. That is why letting the soil dry out between watering is a good idea. You water the roses well when they start to grow in the spring as they need a lot of water then. In the summer you go to the 5 day routine but if the weather turn really hot, lack of water can put rose roots under stress, so you water every three days to make sure the water isn't evaporating. Finally towards the fall you can go back to the 5 day routine until they drop their leaves and go dormant for the winter.
All this is just a guideline as most gardeners have their own way of looking after their roses and no one is wrong in the way they do it if the roses are growing well.
When roses have had too much water, their leaves start to go totally yellow and then they will drop these leaves. This is normal and they will replace the fallen leaves once the condition is corrected.

---------- FOLLOW-UP ----------

QUESTION:      I put a couple of rose stems(canes) in a five gallon bucket of water. These stems had broken off of some plantings and where set on my front porch where the sun could hit them.  It has been about three weeks and the stems are now growing leaves.

If I add a rooting (growth) hormone, will these stems keep growing if planted in soil?

What is the difference between grades of rose bushes (1, 1.5, 2) and what are some of the better brands of rose bushes?  

How important is shade to a bush?

Answer
The roses that are leafing out in the water will only have very thin roots because they wee grown in just water. If you plant them in soil, they will certainly break off. I would add soil to the water to make a sloppy mixture. When you see lots of new growth coming then add even more soil. Don't plant them in the garden until next year as right now they are very weak plants.
I know the rose books say that roses like all day sun but that just isn't true. They love to have all morning sun plus all afternoon sun. But they really don't like the high heat of midday sun. 6 to 8 hours is lots of sunshine and the rest can be shade. Shade helps to keep the blooms lasting longer and not fading.
Grade one hybrid teas should have three canes the thickness of your thumbs. Grade  1.5  should have only two thick canes and grade 2 usually has a few thin puny canes.
If you want good quality roses then buy them from a nursery that specializes in only roses. This way you will be getting a healthy, true to name plant. Jackson and Perkins and Weeks Roses, both have good roses plants in many garden centers. Here are some top mail order nurseries.
Ashdown Roses
Roses Unlimited
Regan Nursery
Edmunds