In order to ensure the protection and upkeep of the work of Mien Ruys , the Mien Ruys Foundation sought to give the Mien Ruys Gardens a monumental status. This was achieved in 2004. The following gardens have received the status of National monument.

Wild garden: 1924 (renovated 2001)
The oldest garden from 1924 was created in the orchard. A small square pond built at the crossing of two straight paths was according to Mien Ruys her first attempt at architecture. The straight forms , softened by her exuberant planting scheme is characteristic of her garden designs.

Old experimental garden:
An English border, 30 x 4 metres, with sun loving perennials, flowering abundantly at different times from half May to the end of September. A path from old worn out concrete tiles inspired Mien Ruys to design the ‘Grion tile’ which preceded the popular exposed aggregate.

Water garden(1954, restored in 2002)
Mien Ruys’s first experiment in designing a garden without a lawn. By creating differences in height in a small space, water and marsh plants are combined with plants preferring dry circumstances.

In 2014 another six gardens got the status of national monument. The gardens are the "Standard perennial garden", "Sunken garden", "Sun borders", "Reed pond", "City garden" and "Borders in the shade".

The Foundation hopes to gain monumental status for all the experimental gardens designed by Mien Ruys in the near future.