Royal Horticultural Society Level 3 Certificate in the Principles of Plant Growth, Health and Applied Propagation

Theory Course

The RHS Level 3 Certificates offer you a structured progression from Level 2 qualifications and the opportunity to study a broad range of theory and practical aspects of horticulture, proving your competence against rigorous RHS standards.


Course content:

  • Plant taxonomy, structure and function
  • The root environment, plant nutrition and growing systems
  • The management of plant health
  • Understanding applied plant propagation


Distance learning: please see the Distance Learning leaflet for details of how the course works.

You can study individual units, or enrol for the complete Certificate.

Online: the certificate course costs £372  (£310 + VAT), or  £99 (£82.50 + VAT) for a single unit

Correspondence: the course costs  £576 (£480 + VAT)  or £150 (£125 + VAT) for each unit

Each of the four units is assessed by a short written examination set by the Royal Horticultural Society in February and June each year.

There is no compulsory course work, but you will be given the opportunity to try sample examination questions if you are going take the examination. RHS exam fees are £25 for each unit, in September rising to £26.This is paid to the RHS by the centre where you take your exams.

Achievement: When you have passed exams in all the units, the Royal Horticultural Society will award a Level 3 Certificate in the Principles of Plant Growth, Health and Applied Propagation. Combined with the other theory Certificate and the Level 3 Practical Certificate, this forms the RHS Level 3 Diploma in the Principles and Practices of Horticulture.

Note: If you have opted not to undertake the examinations for either course but work through all the exercises and practice questions we will issue a certificate of attendance.