How hardy is the silver bush?

Cold tolerance of the blue rhomb

The ones available from us Cultivars of the blue rue are all considered hardy. Their winter hardiness is even given as Z6. This means that this plant can survive temperatures in the range of -17.8 to -23.4 ° C. This means that the blue rhomb is naturally well-equipped for the freezing cold of winter.

Frostbite possible

Although the blue rhomb is hardy, prolonged frosts combined with freezing winds can affect its health. Because then their aboveground plant parts die off almost completely. Usually only the woody parts of the shoots remain undamaged.

Your owner doesn't have to despair about it. Because the remaining root base is enough for survival. In the spring, the blue rue will sprout bushy again.

Protect young plants

Older specimens have become larger and larger over the years and at the same time have become more resistant. You will either survive most winters unscathed or the frostbite will stay within limits.

This high degree of winter hardiness is also inherent in the genes of freshly planted blue diamonds. But they still have to conquer it. Until that happens, they will need the support of their owner. If he fails to take care of her in good time, she 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 rhizome in autumn
• alternatively, cover carefully with brushwood

Winter with leaves

The blue rue should not be trimmed in the fall, as is usual with so many plants. Because their own leaves can keep them warm in winter. Due to the lack of autumn pruning, there are no disadvantages for their growth. This also does not affect the flowering of the following year.

It is sufficient if you do not have the shoots until the spring cut. When the major frosts are over and the plant is about to sprout.