We had very bad frost after an extremely warm spring. It got down to -2,5°C.
Some plants are set back drastically. Others got through without a wince.
I was very excited when my Rhaphithamnus spinosus flowered for the first time. It got beaten badly by the frost. There will definitely be no lilac-colored berries this year. Also, it is really only marginally hardy. The top half of the plant always freezes off in my location.
We have summer-like, very dry weather with temperatures sometimes above 20°C.
This was sold to me as Rhamnus californica, but it looks like your plain old Rhamnus frangula aka Frangula alnus. Though this one is definitely different than our native species because it’s (semi-)evergreen. We will probably find out this year, there are flower buds, the berries will tell.
Rhaphithamnus spinosus on the other hand doesn’t seem to be very hardy. Everything above ground-level dies back and the plant doesn’t want to be a ground-cover! Though it is flowering for the first time.
Another slender plant from New Zealand that came back unscathed like Olearia is Hoheria angustifolia. This one was only covered at the base, so it was withstanding th full force of our minimum temp of -11°C.
After the coldest January mean temperature for over 30 years we had an overly warm February and the second warmest March ever. At least, the plants are happy.
Sorbus rosea from the Western Himalyas looks great in spring. But it doesn’t perform well the rest of the year, for me. The leaves brown early. Last year it had berries for th first time, they tasted disgusting.