Our temperatures have recently hit the daily 90s and, although the weather man hit the pause button, they will turn into daily 90s by month end. Make sure that the roses are prepared for this by getting rid of some of the weeds, adding some organic mulch (no rocks) and keeping the soil as evenly moist as you can (no periods of dry soil, wet soil, dry soil again, etc.). Increase the amount of water per waterings soon. Then ratchet it up some more when we hit the daily 100s. When cooler temps arrive, reverse the process.
In May-June, keep an eye also for aphids.
