| Navy | The Royal Navy |
| Type | Corvette |
| Class | Flower |
| Pennant | K 16 |
| Built by | William Simons & Co. Ltd. (Renfrew, Scotland) |
| Ordered | 25 Jul, 1939 |
| Laid down | 21 Sep, 1939 |
| Launched | 23 Apr, 1940 |
| Commissioned | 24 Jun, 1940 |
| End service | |
| Loss position | |
| History | Transferred to the Royal Danish navy on 8 September 1945 being renamed Thetis. Commanding Officers: T/Lt. Arthur Robert James Tilston, DSC, RNR T/Lt. G. Wallace, RNR T/Lt. C. Blackshaw, RNVR HMS Geranium is not listed as active unit in the October 1945 Navy List |
| Noteable events involving Geranium include: 31 Oct, 1943 |
