Ledvina Trumpet. Trumpet Hybrid. This is a very tall, large honey-yellow flowered cultivar. The very large flowers are down facing and are long lasting. Plants may attain a height of 9 feet if well grown. Excellent plant habit with deep green waxy foliage. Support is needed for the tremendous plants. Blooms in mid-late July. Plants arrive to us through Dennis Ledvina, the renowned Magnolia hybridizer who dabbled in many plant hybridizing projects. Premium bulbs ship after October 15 – the proper planting time for northern tier gardens.