35 degrees in northern Orlando. I heavily watered my mango trees last night and covered the trees that could be covered (up to 7-8 ft tall). Hopefully they are ok.
What temps can mangos tolerate briefly? (2” diameter trunks and up)?
You can ignore the feel like and wind chill forecast. The actual temperature reports are from sensors that are 5 ft off the ground. The actual temperature 1 ft off the ground is probably lower. At 32° when ice crystals form cellular damage begins. Incrementally the damage surmounts as time pass. More than a couple hours is very problematic. You did the right thing by watering heavily. In your freeze combat Arsenal you should have some high quality trunk wrap some C7 incandescent lights and frost cloth for your smaller trees. When trees get mature keep them pruned and manageable. Radiant freeze irrigation. advective freeze with wind above 7 mph propane heaters are your only
option. Worst case scenario with trunk wrap or anything else you can think of protect a couple feet above the graft. Should be able to start to recover with in a couple seasons instead of replacing the tree which would take 5 years or more. This is the new model for the Citrus industry with undertree irrigation a couple feet above the graft union. They can use her already existing under tree micro jet sprinklers that they use for summer irrigation. In the past they tried to save the whole tree but the unpredictability of a freeze duration caused too much limb breakage. Do not buy into the BS of gibberellic acid and Brassinolide they are not cellular antifreeze. Well hydrated cellular structures fair better than dehydrated plant tissue. Magnesium sulfate adds chlorophyll two plants which they use in the Midwest in early spring to help plants with stress related issues such as cold. Not necessary in Florida. Irrigation is very effective against frost on bloom at 18 gallons per hour.
Some border pushers swear by Brassinolide plant sterol.I am not going to dismiss it. Something about elasticity of cellular walls so ice crystals do not rupture. Sounds like wishful thinking to me not something I need to use
This is my short answer aspirin LOL 🙂
https://www.cals.iastate.edu/news/2020/iowa-state-university-researcher-finds-natural-compound-boosts-plants-freeze-tolerance