In the beginning of the movie, Grace and her daughter pick up Ellie at airport. It snows heavily. They go together in Jeep Cherokee to the Palmer house but on stock footage doesn't snow any more. When they stop in downtown, it's again snowing. It's still snowing when they finally come to the family house. However, when their mother goes outside of house, and they go out of Jeep, snow suddenly stops.
In the beginning there is a dinner in the Palmer's family house. There is a heavy snowing outside which can be seen through windows. Ellie and Grace go out and sit on porch, but suddenly there is no more snowing at all.
Around 20 min in the movie, Ellie talks with her mother in their family house. Behind them are large windows. On the left windows is snowing, but not on the right one. And yet, it's clearly sunny in the background. After short talk Ellie goes out of house, and not only there is no more snowing, but is clearly sunny.
When Ellie first walks into the greenhouse and sees that there is hardly any red showing on the poinsettias, she says that maybe it is due to "rot root". As a person who grew up working in the business her entire young life, she would know that the correct term is "root rot". Rot root does not exist in horticulture lingo.
The movie takes place in Maryland just before Christmas, but the only time you see winter is in the stock footage. There are everywhere green deciduous trees and bushes, even flowers. Production used artificial snow to mask it, but it was minimal. You can also hear loud birds singing in the outdoor scenes, and they don't sing in December. It was so warm that cast and extras worn non-winter clothes with mostly open jackets even in the night time, and no hats in day time or otherwise they would sweat too much.
Around 60 min in, Ellie and Shawn climb up on the Palmer's family house and sit together on the roof. It's obviously green screened scene - there is now large empty field with some snow and bare deciduous trees in the background. And yet around Palmer's family house there are a lot of green deciduous trees (as was shot in summer), basically house is surrounded by trees but all those trees are gone when they climbed on the roof because scene is green screened. And there is no empty field behind house, there are greenhouses, but they are gone, too.
When Ellie figures out that the poinsettias are not changing colour because they are getting too much light at night because the neighbouring city's lights have made it brighter and the old covers are too porous, Greg agrees, and says he will order more porous coverings, instead of less porous/impermeable coverings.
The story appears to be set in Maryland based on the license plates on the trucks, but when Sean takes Ellie to his porch overlooking the lake, there is a sharp, harsh set of mountains in the background, obviously the Rockies, which would be unlike any mountains in the East and unlike anything in Maryland.
Almost the whole movie takes place in Maryland based on the vehicle license plates, and town is Conway except the closest Conway is in Pennsylvania. In reality it was shot in Vancouver, Canada.