How-to Guide
Living Christmas Tree Care and Planting
The short answer
A living (potted or balled-and-burlapped) Christmas tree is a dormant outdoor conifer, and warm indoor air breaks that dormancy. Keep its indoor stay as short as you can: Illinois Extension recommends only four to five days total, and NC State Extension sets the ceiling at no more than a week to ten days. Longer, and the tree may start growing indoors and be killed when it goes back into the cold.
Transition the tree gradually in both directions — a stint in an unheated garage or sheltered spot on the way in and again on the way out. Indoors, keep it in the coolest spot you can, away from heat vents and direct sun, and check the root ball's moisture daily.
Plan the planting before the ground freezes: prepare the hole (or cover the planting site with a thick straw layer to keep the soil workable), then plant promptly after the holidays, remove all burlap and twine, set the root flare at ground level, mulch, and water.
How long indoors — the honest number
This is the make-or-break rule. University of Illinois Extension advises the tree "should only be inside for four to five days total"; NC State Extension allows no more than a week to ten days. The reason is dormancy: extended indoor warmth counteracts winter dormancy, pushing the tree toward active growth that tender new tissue cannot survive when the tree returns outdoors.
While waiting for its indoor turn, store the tree outside in a shady, sheltered spot (the north side of a building works) so it stays fully dormant.
Acclimation in and out
Don't move the tree straight from freezing outdoor air to a heated living room or back. Use an unheated but sheltered intermediate space — a garage or outbuilding — for a few days on the way in and again on the way out, especially if the weather is severe. NC State Extension recommends storing the tree in an unheated, wind-protected area if the ground is frozen and it can't be planted immediately.
Indoors, place it in the coolest spot available, away from heat vents, fireplaces, and direct sun. Use cool-running LED lights rather than heat-generating incandescents. Check moisture daily: a container tree should be watered until a little collects in the saucer; for a balled-and-burlapped tree, set the root ball in a watertight tub — NC State suggests keeping only an inch or two of water in the bottom, and some growers spread crushed ice over the top of the root ball to water it slowly. A full-size tree can use as much as a gallon of water a day indoors.
Planting out after the holidays
Prepare the site in fall, before it freezes. Illinois Extension suggests covering the planting spot with straw 6 to 8 inches deep to keep the soil from freezing deeply so you can still dig in January; you can also dig the hole in advance and store the backfill somewhere unfrozen.
When planting, dig the hole wider than the root ball (Illinois says at least 12 inches wider) but no deeper — NC State advises a hole slightly shallower than the root ball so the tree sits marginally high. Remove all burlap, twine, wire, and any container. Set the root flare at ground level, backfill, apply 2 to 3 inches of mulch (the straw from site prep works), and water well. Hold fertilizer until spring, and keep watering through dry spells in the first year.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- University of Illinois Extension — How to care for a living Christmas tree — Indoors only 4-5 days total or the tree breaks dormancy; store outside in shade before its turn; straw 6-8 inches deep over the planting site keeps soil from freezing; dig hole at least 12 inches wider than root ball; remove burlap and twine; root flare at ground level; reuse straw as mulch
- NC State Extension — Selection and Care of Living Christmas Trees — No more than a week to ten days indoors; indoor warmth counteracts conifer dormancy; cool spot, LED lights; tub with an inch or two of water / crushed ice over root ball; may need up to a gallon of water a day; unheated wind-protected storage if ground frozen; hole slightly shallower than root ball; 2-3 inches of mulch; delay fertilizing until spring