Too much water. Nothing needs constant water, especially in December, even in So Cal. Let the soil dry on top before watering again. If it's in a pot make sure the water drains out the bottom. Potted roses in So Cal might need daily water most of the year, but not in December, unless they're extremely rootbound. And roses in the ground do not need daily water unless they're in very sandy soil. As I recall, most of So Cal has clay, and clay stays wet for a LONG time. Clay soil presents another problem - getting the water in deep enough. Takes way longer than you would think. When I gardened in NorCal on heavy adobe clay, I would use drip irrigation to water the roses - five drippers at a gallon an hour, for about an hour, two or three times a week in the hottest weather, and not at all in winter. Minis would need only two or three drippers. when you say full sun, that's for at least 6 hours, right? Sometimes when people say 'full sun', they only mean that it gets direct sunlight at some point of the day, even if just a few minutes. Cold??? what do you mean by cold?? My roses are still nice dark healthy green, and they've been snowed on twice this month. Our temps have typically been in the upper 30s - low 40s, with occasional dips to upper 20s. Has it been colder than that where you are? They've also gotten nearly a foot of rain this month, but they're all in very well drained soil. We typically get about 55 inches of rain a year, but we also typically have gravelly and sandy soils, not clay.

Thank you seil for your reply. It perhaps is Sequoia Gold or Sun Sprinkles.

Wow, that's a nice one. Please tell us the name of it. I have three 'Pacific Serenade' miniature yellows on order. Hope they look as good as yours. Randy

From what I have read, Valencia is supposed to be 2 to 3 ft We will see because things tend to get larger here If it turns gynormous I have another place for it.