The individual yellow flowers are small, but the profusion of flower clusters create a showy display that is a welcome respite from winter. The cornelian cherry dogwood is among the first trees to flower here in Philadelphia in the late winter or early spring. Meyer (See gallery below for more photos) Celebrate by planting a tree for future generations, in your garden or your neighborhood. The Scott Arboretum at Swarthmore College also has an outstanding collection.Īrbor Day in Pennsylvania is the last Friday in April. The Morris Arboretum has many in its plant collection and offers a good opportunity to pick your favorite. With each passing year, more yellow cultivars of Magnolia are being introduced. Its form tends to be somewhat irregular, differing from the more formal upright, pyramidal form of ‘Elizabeth.’
It seems to be somewhat smaller in stature and the flowers are a deeper yellow. ‘Butterflies’ is another outstanding selection that is becoming available from nurseries. It is a Pennsylvania Horticultural Society Gold Medal winner. Three fine maturing trees frame the upper curve on the Morris Arboretum driveway. It is a rapid grower, and it is a good tree for the impatient tree planter. Its pale butter yellow flowers are produced at a very young age. The cultivar ‘Elizabeth’ was an early hybrid selection introduced in 1978 by the Brooklyn Botanic Garden. Its Chinese cousin can reach 60 feet tall and has large, showy creamy-white flowers, which appear before the leaves. Though the flowers are somewhat inconspicuous, its genetics enable the yellow pigment important to this breeding line. Its flowers are relatively small compared to other magnolias and it flowers after the foliage emerges. The American parent is a canopy tree growing to over 100’ tall. These selections are generally destined to become big, tall trees. Since they flower later, they are less likely to get hit by a late frost. They are sometimes fragrant and range from light butter yellow to a golden yellow. The combination of these two parents has resulted in many cultivars which flower later (late April) than the more common star and saucer magnolias.
Many of the yellow magnolias are the result of crosses made between the American cucumber tree magnolia, Magnolia acuminata, and the Yulan magnolia, Magnolia denudata. In recent decades, new hybrid selections of yellow flowering magnolia have been introduced and are now becoming more widely available.
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