Green’s Dictionary of Slang

roses (are) red n.

(Aus./US) a bed.

1919		T.A. Dorgan in Zwilling TAD Lex. (1993) 70: Its the rhyming slang. Roses red that’s the bed.
1935		A.J. Pollock Und. Speaks n.p.: Roses red, a bed.
1942		D. Runyon in Star (Marion, OH) 31 July 6/8: I will now [...] climb into the roses red, place the lump of lead on the weeping willow and plow the deep.
1960		J. Franklyn Dict. of Rhy. Sl.
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxix 4/4: roses are red: Bed. Shortened to roses.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 9: The room and roses are red in this half-pie polly waffle were like what the dog said when he sat on the sandpaper, ‘RUFF.’.
1999		E. Bunker Mr Blue 114: ‘Roses and reds’ is the bed.
2002		Pete’s Aussie Sl. Home Page 🌐 roses red: a bed.