Keeping a Christmas tree alive comes down to water and temperature. A cut tree can drink a surprising amount, and as long as the supply never stops and the room is not too warm, it will hold its needles and its scent for weeks.
Below is the routine that tree growers recommend, from choosing a fresh tree to rescuing one that has started to droop.
Start with a fresh Christmas tree
The easiest way to keep a tree alive is to buy one that was cut recently. Trees sold in towns are often felled weeks before they reach the forecourt, while a farm can cut yours on the day, so it comes home with all its moisture still inside.
Before you buy, run your hand along a branch: fresh needles stay on the tree. They should be flexible, deep green and smell resinous when crushed. You can search for a Christmas tree farm near you to cut or choose your own.
Variety matters too. Nordmann and Fraser firs are naturally better at holding their needles than spruces, so they are more forgiving if you forget to top up the water once. See how long a real Christmas tree lasts for a comparison of the common types.
Cut the base before it goes in the stand
Always cut a fresh slice of 2 to 3 cm off the bottom of the trunk just before you put the tree in its stand. When a tree is felled, sap quickly seals the cut end within a few hours, and a sealed trunk cannot drink properly.
A few tips for the cut:
- Cut straight across, not at an angle or in a V. A flat cut sits well in the stand and exposes the most wood to the water.
- Do not shave the bark off the sides of the trunk to make it fit. The outer layers just under the bark do most of the water carrying.
- Get the tree into water within an hour or so of cutting.
If you are not decorating straight away, cut the base and stand the tree in a bucket of water somewhere cool and sheltered outside, such as a garage or shed. Then give it another fresh cut when it comes indoors.
How much water does a Christmas tree need?
A real Christmas tree can drink a litre or more of water a day, and a freshly cut tree may take several litres in the first day or two. A rough rule of thumb is to allow around a litre of stand capacity for every 2 to 3 cm of trunk diameter.
That makes the stand the most important piece of kit. Choose one that holds at least two or three litres for an average 6 to 7 ft tree, and more for larger trees. Old style stands that grip the trunk with a few screws often hold very little water and run dry overnight.
Make watering part of your daily routine:
- Check the level every morning, and again in the evening for the first week.
- Never let the water drop below the base of the trunk. If it does, the cut can seal and the tree stops drinking.
- Use a jug or a watering can with a long spout to reach under the branches without spilling onto presents or lights.
If you have cats or dogs, cover the top of the stand with a tree skirt or foil so they cannot drink from it. Our guide to Christmas trees and cats covers the other safety points.
Where to put your Christmas tree in the house
Put your tree in the coolest part of the room, away from radiators, open fires, wood burners and sunny south facing windows. Heat dries a tree out far faster than anything else, and a tree that sits next to a radiator can lose its needles in days.
If the only good spot is near a radiator, turn that radiator down or off. Avoid placing the tree over underfloor heating if you can, and keep it out of the path of warm air from fan heaters.
Lights matter too. Modern LED lights give off very little heat compared with older bulbs, which helps the needles stay moist. If you are choosing new ones, our guide on how to put lights on a Christmas tree explains what to look for. Switch lights off when you go out or go to bed.
Do sugar, aspirin or lemonade help a tree last longer?
No. Plain tap water is all a cut Christmas tree needs, and there is no reliable evidence that home remedies such as sugar, aspirin, lemonade, bleach or vodka keep a tree fresher. Some can even make things worse by encouraging bacteria and slime in the stand.
Commercial tree preservatives exist, but research by tree growers has generally found that clean water, topped up often, performs just as well. The money is better spent on a good stand with a large reservoir.
Anti-transpirant sprays, which coat the needles to slow moisture loss, are sometimes recommended. Opinions on them are mixed, and they are no substitute for water.
Keeping a potted Christmas tree alive
A potted tree needs a different approach because it still has its roots. Keep it indoors for no more than 10 to 12 days, in the coolest room you have, and water the compost so it stays moist but not waterlogged.
Bring it indoors gradually if you can, for example by standing it in a porch or garage for a day or two first, and do the same when it goes back out. Once outside, keep it in its pot in a sheltered spot and water it through the winter. A tree that was grown in its pot, rather than dug up and potted, has the best chance of surviving to next year. Our page on real cut or potted trees explains the difference.
What to do if your Christmas tree starts drying out
If your tree has stopped drinking or the needles are starting to fall, act quickly. Check the stand first: if the water has run out, refill it straight away. If the level has not gone down for a day or more, the base has probably sealed over.
To fix that, take the decorations off the lower branches, lift the tree out and cut another thin slice off the base, then return it to fresh water. It is a fiddly job with a decorated tree, which is why daily watering is the better habit.
Give the tree a gentle shake outside or a sweep around the base to clear the dead inner needles, which are normal and not a sign of trouble. Turn the heating down in the room. A tree that has become very dry and brittle is a fire risk, so if green needles are falling in handfuls it is time to take it down.
For more on keeping the needles on, see Christmas trees that don’t drop needles. And once your tree is up and watered, our guide on how to fluff a Christmas tree will help it look its fullest. Our older page on keeping your tree fresh has a short checklist to keep by the stand.
Questions people ask
Should you put sugar in Christmas tree water?
There is no need. A cut tree draws up plain water perfectly well, and sugar can encourage bacteria and mould in the stand. Clean tap water topped up daily is the best thing you can give it.
Can you use hot water to revive a Christmas tree?
Some people pour warm water into the stand to help soften the sap seal, but there is little good evidence it helps. A fresh cut across the base is far more reliable if the tree has stopped drinking.
How often should I water my Christmas tree?
Check the stand every day, and twice a day for the first few days when a fresh tree drinks the most. The water should always cover the bottom few centimetres of the trunk.
Is it safe to keep a real Christmas tree with pets?
Generally yes, but cover the stand so pets cannot drink the water, and sweep up fallen needles, which can irritate mouths and paws. Keep low branches free of tempting decorations.
Can I keep a cut Christmas tree alive after Christmas and plant it?
No. A cut tree has no roots, so it cannot be replanted, though it can be recycled or chipped. If you want a tree to plant out, buy a pot grown tree instead.
