Nephrite as a surface treatment. A lot of nephrite tools and amulets are known since the Early Neolithic (VII mill. BC) to the Late Chalcolithic (V mill. BC) on the Balkans (mainly Bulgaria; also in Greece, Serbia, Croatia) from two or more unknown sources - Balkan "nephrite culture". Such tools are found in the Later Neolithic of Poland (from the most probable local source Jordanów), Sardinia (Italy) (unknown source) and Switzerland (Kostov, 2005; 2013). Single or just a few finds of nephrite artifacts are reported also from some other European countries. During Neolithic times, the key known sources of nephrite jade
Ornamental grass long lasting, often remaining well into the winter. Some "Stipa" species flower in the spring, the inflorescence standing almost two metres above the clumps of leaves, and again the seed heads last late into the winter. When gardening near natural wildland-urban interfaces, care to avoid invasive species, such as "Cortaderia jubata", "Pennisetum setaceum", and "Nassella tenuissima" (syn. "Stipa tenuissima"), is responsible horticulture. Ornamental grass Ornamental grasses are grasses grown as ornamental plants. They have become increasingly popular in gardens in recent years. Ornamental grasses are popular in many colder hardiness zones for their resilience to cold temperatures and aesthetic value