Sedulous

From Latin sedulus ("diligent").

Full definition of sedulous

Diligent in application or pursuit; constant, steady, and persevering in business or in endeavors to effect an object; steadily industrious; assiduous.

2001 Pollan, Michael, The Botany of Desire, Random House, New York, page 135:With the right equipment, an indoor grower could create a utopia for his plants, an artificial habitat more perfect than any in nature, .... These sedulous attentions would be wasted on male plants, which are worse than useless in sinsemilla production.
2010 Paul Routledge, Daily Mirror, 9 March 2010 http://www.mirror.co.uk/news/uk-news/scotland-is-turning-into-another-country-loch-756030:The Scots have always been a fiercely independent people, but it surprised me how far this sedulous process of separation has gone already.