Gardening plays a crucial role for urban sustainability, yet not all urban gardens receive equal support. Community gardens, often seen as efficient sustainable land-use innovations in a densifying city, tend to be prioritised over traditional sustainable practices such as allotment gardening. Using the case study of Prague and Brno, Czechia's two major cities, this article introduces the concept of the quiet right to the city to highlight various routine and inconspicuous ways of negotiating quiet sustainability in urban spaces. We analyse different perceptions of community and allotment gardening by municipal actors, gardeners and activists by comparing the two gardening practices across four dimensions which are both conducive to urban sustainability and the right to the city: (1) public access to urban greenery and spatial justice, (2) community building and engagement, (3) food cultivation, (4) environment and climate protection. We argue that governments' preference for gardens better aligned with the status quo undermines citizens' right to the city, urban sustainability and resilience against future threats. Urban sustainability and allotment gardeners' quiet right to the city could be amplified by addressing governments' bias and fostering alliances between allotment and community gardeners, leading to a convergence of their gardening practices.