Posted: 02/10/2015 at 11:14
For medium size flowering trees consider some of the alternative horse chestnuts.
Aesculus indica-elegant dark foliage and horse chesnut flowers in summer.
Aesculus flava - yellow buckeye yellow horse chesnut flowers in spring and lovely autumn colour.
Neither grows as large as the common horse chestnut.
If you in S.E England or east midlands there are the Catalpas, the Indian bean but also Catalpa speciosa and Catalpa x erubescens.
An easy to grow one is Manna ash, Fraxinus ornus - looks like a smalller common ash but has ornamental flowers in May.