Urban heat islands and climate change allow frost- and cold-sensitive plants to now prosper in areas where they once regularly perished.
Also, if a tree is planted at a larger size, it may survive where a smaller plant or seedling would perish.
Another simple possibility is that a quoted hardiness rating is in error. Many plants have not been fully tested for in all climates.
There are also other variables to consider. For example, a plant might do fine in dry cold at -5º C in December, but die from a wet freeze at -5º C in April.
No... the USDA Climate Zones are based on annual lowest temperatures, not the date of the first frost.Hardiness levels/zones only tell you when the average date of first frost is, nothing about actual temperature lows or durations of cold temperatures.
Are you curious about Jacaranda mimosifolia growing in Athens? Even though Athens has received snowfall in recent years, online sources state that Athens minimum Winter temperatures have stayed above -5º C (23º C) in recent decades. That is mild enough for Jacaranda mimosifolia to survive, though a particularly young or exposed tree could receive frost damage.If a tropical tree is big and it snows for 1 day, is it enough to kill the plant? how long i mean, freeze sensitive plants survive under 5 Celsius temperature (41 degrees Fahrenheit)
I am interested for Albizia saman / monkey pod and Pterocarpus indicusAre you curious about Jacaranda mimosifolia growing in Athens? Even though Athens has received snowfall in recent years, online sources state that Athens minimum Winter temperatures have stayed above -5º C (23º C) in recent decades. That is mild enough for Jacaranda mimosifolia to survive, though a particularly young or exposed tree could receive frost damage.
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