Answer: Mandevillas survive winters only in mild regions. In colder regions, they are often treated as annuals. Yes, digging them will disturb the root system and cause some transplant shock. Water deeply the day before you dig them. Moist soil will help keep the root ball intact. Have containers ready so their roots won't dry out. You might also want to take cuttings and start new plants as an insurance policy. Good luck!
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