Palm trees can't be had in the state of Maine because of its extreme winters. Maine has a sticky mainland atmosphere with warm and damp summers and cold winters. In July the temperature ranges from 75– 80 °F (24– 27 °C). In January the temperature ranges from 0-32 °F (−18 – 0 °C).
The hottest temperature at any point recorded was 105 °F (41 °C) and the most minimal was −50 °F (−46 °C). It doesn't get tropical storms. Maine USDA zones territory from 3a to 6b.
Palm Trees in Maine
Not shockingly, Maine is unreasonably cold for palm trees. If you want palms here, you need to have them outside during the summer, and bring them inside during the colder month! That way you will have palm trees for at least the warmer months to enjoy. Here are some good indoor/outdoor palm trees.
Areca Palm Tree – Zones 9a – 11 (20 to 25 F)
Chinese Fan Palm Tree – Zones 8a – 11 (10 to 15 F)
Kentia Palm Tree – Zones 9b – 11 (25 to 30 F)
Lady Palm Tree – Zones 8b – 11 (15 to 20 F)
Windmill Palm Tree - Zones 7b-11 ( 5 to 10 F )