Telekia speciosa (Buphthalmum speciosum) | Heartleaf Oxeye
Heartleaf Oxeye, also known as showy telekia, oxeye daisy, and yellow oxeye is an easy-to-grow herbaceous perennial with large, heart-shaped leaves and single 6″ sunflower-like blooms with feathery yellow petals and large golden centers on branched stems that bloom July through September.
Telekia speciosa grows along forest margins in shady or semi-shady places where the earth is damp. It is a good choice for large gardens and gardeners who want to attract butterflies. Beetles also gather in the flowers to eat its pollen.
Heartleaf oxeye ris nearly identical to Inula magnifica (Magnificent Elecampane) which is another large perennial, but it differs from Elecampane in that its slightly cordate leaves have green undersides while Elecampane’s longer, more narrow leaves have woolly undersides. Inula magnifica is also substantially taller. The seeds are different too.
Does best in part sun/part shade, but can tolerate full sun as long as it’s growing in moist soil.
Sun exposure: Part shade to full sun
Mature height: 4-6+ ft
Mature width: 3-4 ft
Hardiness zones: 3-9