The Red Horsechestnut has a rounded to wide rounded canopy that reaches 40 feet tall by 30 feet wide at maturity. This is a hybrid that is a result of a cross between Aesculus pavia and Aesculus hippocastanum, hardy in zones 3-7.
Dark green leaves made of 5 leaflets, occasionally you will find leaves made of 7 leaflets. Blooming in April and May the soft rose-red flowers are borne on a 6-8″ lonf and 3-4″ wide panicle. The seed is a globose 1.5″ capsule with small barbs, this species is true to the seed.
This tree has good value in the landscape. Due to its overall size it is well suited for many applications, from parks to campuses and even in some residential situations. Care should be given as to placement as the tree does spread to 30 feet.
The Red Horeschestnut is not as susceptible to leaf blotch and mildew as Aesculus hippocastanum. Planted in full sun to part shade this tree will perform well. Rather adaptable to many soil types, I have seen this tree do well in the rather alkaline soils of the Rocky Mountain states as well as the rather acidic soils of Seattle. Moist well drained soil and summer irrigation will help this tree become established.
‘Briotti’ a deeper red flowering variety that has larger panicles(10-12″) than that of A. carnea.
‘O’Neill Red’ is noted for its single bright red flowers.