want to grow a southern magnolia. How cold hardy are they?
Southern magnolia, Magnolia grandiflora, is often associated with
the Deep South, and it is here that it is most at home. A few varieties,
among them 'Edith Bogue', 'Poconos', and 'Bracken's Brown Beauty', are
a bit more hardy than others. Some reports indicate that certain
trees have survived brief interludes of -25°F. If you experience
long periods with temperatures below -10°F, southern magnolias will
probably not be viable in your landscape, particularly if dry winter winds
are a factor.
I love the
spring-flowering deciduous magnolias, but the blossoms are often frozen
and turn brown_is there any way to prevent late spring freezes
from damaging my magnolias?
Spring magnolia flowers are damaged by frost in one of every four years
on average in the Washington area. If you have the opportunity to plant
a new magnolia, though, opt for one that is later blooming. Much of the
work done to develop new magnolia cultivars at the National Arboretum focused
on producing hybrids that bloom a bit later. To that end, we have great
cultivars like 'Galaxy'
and the "girl"
series of magnolias: 'Jane', 'Ricki', 'Betty', 'Susan', 'Ann' and 'Judy'.
All bloom as much as two weeks later than the common star magnolia, Magnolia
stellata, and the saucer magnolia, Magnolia x soulangeana.
are some other sources for information about magnolias?