A ban on Rutaceous plants currently prevents boronia flowers from entering the United States. Major obstacles to expansion of exports are the short flowering season and limited colour range. Boronia heterophylla is cultivated extensively in Western Australia. Figure 2A. Close up of Boronia heterophylla. Site selection Boronia generally prefers well-drained soils with a slightly acid pH. A cool period is required to initiate flowering.
Strong winds can damage plants, so avoid windy sites, or construct or plant suitable windbreaks.
Test potential sites for Phytophthora and nematodes. Phytophthora affects a wide range of native plants and is almost impossible to eradicate. If sampling reveals the presence of this pathogen, find an alternative site. A soil analysis before planting to determine the residual phosphorus level is also suggested. Soils with a very high residual phosphorus level should be avoided.