Rhododendron 'Madame Masson' fertilising
- From mid March to begin May Once
Rhododendron 'Madame Masson' planting
- From end March to mid May Once
Rhododendron 'Madame Masson' pruning
- From begin April to end May Once
Rhododendron 'Madame Masson' flowering
- From end April to begin July