The steppes of the Near East certainly have a different climate than we have here. This is where the bluerod comes from, which is why it is also known as Russian lavender. The numerous flowers prove that she likes our summer days. But is it also hardy?
Is the blue rue hardy?
The blue rue (also called Russian lavender) is hardy and survives temperatures from -17.8 to -23.4 °C. However, young plants need winter protection in the form of leaves or brushwood around the rootstock for the first 2-3 years.
Cold tolerance of the blue rue
The varieties of blue rue available from us are all considered hardy. Their winter hardiness is even given as Z6. This means that this plant can survive temperatures ranging from -17.8 to -23.4°C. This means that the blue diamond is well prepared for the icy winter temperatures.
Frostbite possible
Although the blue rue is hardy, prolonged frosts combined with icy winds can affect its he alth. Because then their above-ground plant parts die almost completely. Usually only the woody parts of the shoots remain undamaged.
Your owner doesn't have to despair because of this. Because the remaining root base is enough for survival. In spring the blue rue will grow bushy again.
Protecting young plants
Older specimens have become larger and more resilient over the years. You will either survive most winters unscathed or the frostbite will be limited.
This high winter hardiness is also in the genes of freshly planted blue diamonds. But they still have to conquer it. Until then, they need the support of their owner. If he fails to take care of it in time, it can die completely in a particularly cold winter.
- Winter protection measures are necessary
- at least in the first 2-3 years
- pile up dry leaves around the rootstock in autumn
- alternatively cover carefully with brushwood
Winter with leaves
The blue rue should not be cut in autumn, as is usual with so many plants. Because their own leaves can keep them warm in winter. A lack of autumn pruning does not have any disadvantages for their growth. This also does not affect the flowering of the following year.
It is sufficient if you do not cut the shoots until spring. When the worst frosts have passed and the plant is about to sprout.
Tip
In spring you can use the clippings to propagate Russian lavender. Because you can never have enough of this bee pasture.
