These tough tap rooted perennials make excellent border plants and can thrive in hot sunny spots in well-drained soil although they perform best with some good. Eryngium × zabelii 'Neptune's Gold'PBR. About this cultivar: · Position: Full sun, partial shade · Soil: Almost any soil, grows well in Ballyrobert · Flowers: July, August, September, October · Other. A new and totally unique introduction of Sea Holly - the foliage of this Eryngium is a brilliant golden colour, it will become lime green if slightly shady. Commonly known as Eryngo, Variable-leaved sea holly. . The bracts show colors from gold to silver to lavender to blue. Flower color: Mid-light blue standards; mid dark blue falls, slightly greyed by yellow underlay, lighter blue rim, distinct round gold signal with blue veins. Imagine this in an eryngium, "the spiky bracts are silvery blue at the base, turning gold at the tips. sea holly 'Neptune's Gold'. A stunning. The stems of 'Neptune's Gold' are blue, and the foliage. An upright, herbaceous perennial to about 50cm. The foliage and flower bracts are spiny. Striking golden-yellow foliage and blue flowers. ERYNGIUM x zabelii 'Neptune's Gold'. Step into the roles of history's most fierce warriors and embark on a new journey where bravery and good fortune will greatly determine whether you come out. Golden leaves contrast nicely with steel blue stems and deep periwinkle blue flowers.