The magnolia originally comes from North and Central America and Asia, but not necessarily from always warm climate zones. Some magnolia species are naturally used to freezing temperatures, while others are native to Mediterranean or subtropical regions. However, many new breeds are now specifically drawn to winter hardiness.

Deciduous species less sensitive to cold

Basically, it can be said that most of the magnolia varieties that are commercially available are quite hardy, which is why - with a few exceptions - they can be planted out in the garden without any problems. However, the deciduous magnolias, which regularly shed their leaves in autumn, are much more resistant. These varieties are naturally adapted to cold winters, unlike the evergreen species. The latter have their home in warmer climes and therefore need more protection. However, young magnolias in particular, regardless of the variety, always need good winter protection. They only get used to the freezing temperatures with age and are also not strong enough to withstand the cold when they are young. The roots also always need protection (e.g. with a thick layer of bark mulch), as they grow just below the surface of the earth and can therefore freeze to death quickly.

Popular hardy cultivars

magnolia species Latin designation variety flower color frost hardiness
Tulip Magnolia Magnolia soulangiana genius dark red up to approx. - 23 °C
Tulip Magnolia Magnolia soulangeana different white, pink or purple up to approx. - 24 °C
Purple Magnolia Magnolia liliiflora Nigra purple up to approx. - 24 °C
Purple Magnolia Magnolia liliiflora Suzanne purple up to approx. - 27 °C
star magnolia Magnolia stellata different sorts White up to approx. - 30 °C

Only plant early-flowering varieties in mild regions

Even with winter or frost hardy magnolias, the low frost resistance of the buds or flowers is a problem. While the tree itself may be hardy, its flowers are not. Late frosts in spring can therefore rob it of its flowering, which is why you should either protect it in good time or opt for a late-blooming magnolia species. The summer magnolia (Magnolia sieboldii) with its distinctive flowers does not bloom until about June and is therefore not endangered. Varieties that bloom very early (e.g. star magnolia, Magnolia stellata) should therefore only be planted in regions with a rather mild climate.

tips and tricks

Potted magnolias, whether hardy or not according to the variety label, are always endangered by frosty temperatures and should therefore at best overwinter in cold house conditions. The reason for this is the sensitive roots, which are not sufficiently protected by the pot.

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Trees