She said the word was put out to St John Area Committee members, and friends of members, and as a result they have received donations of cot-sized patchwork blankets, materials so members could make blankets, knitted blankets and crocheted blankets.
Overall they have just under 300 blankets.
"I was absolutely blown away by the support we got," Greenfield said.
"You can just imagine some of the families loving not just the warmth, but the colour and vibrancy of these blankets."
Whangārei Oranga Tamariki social worker Nicole, who did not want her last name used, said social workers were "blown away".
"The blankets have been gifted to people who need them most and they have been so graciously received.
"There are kids who have been over the moon to be able to choose a blanket and call it their own.
"We've had families brought to tears knowing that people have considered them and their wellbeing and want to help," she said.
It is the first time St John Ambulance Whangārei have taken part in the initiative but Greenfield hoped to keep it going and next year include other items to keep families warm - like little hats, pyjamas, and knitted jerseys.
If anyone would like to donate to the initiative they can contact Greenfield on 09 438 2409 or they can drop blankets to the reception of St John Ambulance Whangārei on Western Hills Drive.