Guayule is a low user of nutrients. Fertilisation requirements are highly dependent
on soil fertility. In general, application of nitrogen (18 - 210 kg ha-1) in combination
with irrigation increased plant biomass yield. Pests are not a major issue for
guayule.
A method to improve production of high molecular weight rubber by adding a growth
regulator has been described (Bauman, 1979). This method is also used to improve
latex production by Hevea, and needs further study.