Laburnum may grow to 25 ft. tall and about as wide, but usually in our area it is only about 20 ft. tall by 10 ft. wide. It is grown for its bright yellow flowers that bloom in May (if the frost doesnt get them). The flowers cascade down from the branches in 20 in. long clusters and are quite showy. It should be noted that the tree and seed pods are poisonous and this tree should not be planted in a yard with young children or curious pets. Plant where it will get afternoon shade, well-drained soil and deep water once a week, every 7-14 days. This deciduous tree is temperature sensitive and needs some protection. Not disease prone.