The Foxtail Lily Yellow, 'Eremurus Stenophylius' produces impressive tall spikes of hundreds of small, yellow, lilylike flowers on a tall stem. These spectacular flowers make a colorful and bold statement in the early summer garden. Towering at the back of the sunny border, the leafless flower stalks grow above green, strap-shaped leaves. The roots of the Foxtail Lily must be handled very carefully. The soil should be well-drained, so add sufficient sand to heavy clay soils. Although the tubers are winter hardy, a mulch layer is highly recommended.