[header] How to care for a living christmas tree [title] Keep your tree outside until a few days before christmas. [step] Living christmas trees should not be kept indoors for more than 7-10 days at most. [title] Acclimate your tree to indoor temperatures. 
[step] Slowly bring your tree indoors so as not to shock an outdoor tree by exposing it to warm indoor temperatures. The warm temperature will encourage tree growth which is to be avoided.