Hi there, I haven't been able to find anything about L. fasciculatus, but according to Lawrie Metcalf ('The Cultivation of New Zealand Plants', 1993) it is easy to grow Leucopogon fraseri from seed, cuttings or by layering. It prefers sunny, free draining soil. Apparently not all Leucopogon species are self-fertile, so it is recommended that several plants are grown in close proximity to ensure fruit is produced. (