Golden Clematis A very vigorous deciduous climber, Clematis tangutica bears single, lantern shaped, golden-yellow flowers in late summer to autumn. The foliage is bright green with coarsely toothed divided leaves. It carries profuse silky seed heads from autumn through to winter. Position: Full sun or light shadeSoils: Moist, well-drainedFlowering Period: Late summerHardiness: Fully hardy in IrelandSize: Can reach 15 - 20 ft