There will be a farewell ceremony at Blooms of Bressingham on 11 June at 3.30pm at West Suffolk Crematorium and Cemetery, Risby, Bury St Edmunds IP28 6RR.
She was actively involved in maintaining Adrian Bloom’s home garden Foggy Bottom.
Garden writer Peter Seabrook said: "She was a great host to the many horticulture and garden visitors over the years. Rosemary was a truly lovely lady who will be sorely missed by all. We express our sympathies to Adrian and their three sons Jason, Matt and Richard."