The EDM was tabled on April 9 by MP for Hayes and Harlington John McDonnell and has attracted cross-party support, signed by 17 Labour MPs, three Liberal Democrats, three Conservatives, two Democratic Unionist Party members, one Independent and one Green.
The MP whose constituency Kew is in, Zac Goldsmith, is one of the signatories.
An online petition started by an officer at Prospect union, Julie Flanagan, to the Government asking for it to "urgently reverse existing, proposed, and further cuts to RBG Kew’s annual operating grant in aid" has now reached nearly 85,000 signatures.
Flanagan has encouraged petition supporters to lobby their MPs and ask them to sign the EDM.
Both petitions follow the announcement at the end of March that as many as 125 jobs could go at the world-renowned scientific and horticultural botanic garden, as Kew bosses struggle to close a £5m funding gap.
Funding from central Government has been cut year-on-year over the life of this Government.
EDMs are one of the few ways backbench MPs can get a subject debated in the House of Commons, although few are given the chance to do so. However they do raise awareness and draw press attention.