Local nurseries prepping for the cold blast. Flamingo Road Nursery owner Jim Dezell says take in all small house plants when the temperature dips below 50 and if you have sensitive plants in the ground, keep them warm. The nursery is running its irrigation continuously overnight this weekend because the water creates a warming environment for the plants. South Florida's last hard freeze was in 2010 when temperatures in Fort Lauderdale fell to 36 degrees and 31 in Redland.