outdoor plant heat lamp

Winter Heat lamp

Hi, I’m trying to figure out what type of lamp to use this winter to warm my mango tree.

I’ve heard you can use infrared lamps but I’ve got no clue where to get one as I’ve just bought my first tree. Another person suggested Christmas lights (I’ve heard a lot of controversy on this one). I recently bought a lamp for my aquarium and it is a UVA/UVB lamp but it does not seem to feel warm to the touch. I’m not sure if this aquarium lamp would work or not.

I’m sorry about the very elementary question but like said, I’m new to this.

Thanks in advance,


Mostro: Thank you so much for the advice! That helps a lot. Do you have any suggestions on where to buy infrared lights? Or what type to buy (Bar, bulb, etc.)?

Thank you so much

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Comments (7)

Andrew Scott

Whats up mangodude!
When I was into tropicla birds my vet told me that I should buy a heat lamp for reptiles. The vet said that it puts out heat to simulate the uv rays from the sun. Maybe that light would help warm the mango? I’m in no way saying saying you should try this but maybe it would help?

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Hi mangodude:
I live in fl/jax and I have some very tropical things here with good success. Of course, I lived and learned like all of us.

Remember, this is just what I do! Please, don’t be mad at me if your plants die or your house catches on fire.

About Christmas lights: Be very careful if you use them. The only two plants I have lost died because the Christmas lights over-heated the trunk and killed my guava about 6 inches from the ground. I had wrapped the lights on the trunk and covered it with a blanket, you should not do that. So, I just use warm water and infrared heat lamps now.

Here is what I have done to keep my mango, keylime, guava, and others alive:

1. If potted: I just bring them in the garage (no extra heat needed).
2. Planted in ground but small: place a large bucket (5gl) of warm water right next to the trunk and cover plant with a sheet and then a blanket.
3. If planted but large: I use two large buckets of warm water next to the trunk plus one or two 250W infrared heat lamps placed on the ground looking up toward the canopy. Also, you must cover the tree for the method to work.
4. If planted but very large: keep adding more heat lamps or more heat sources until you feel it is ok.

The methods above I use when it is a tender plant. For other plants (E.G. oranges) often you can just place hot water and/or heat lamps under the tree and not cover it and it will be fine. It all depends on the minimum expected temperature, check the NWS forecast right before you go to bed the night of the freeze to make sure that your protection is sufficient.

To succeed you have to use your common sense. If you heat your plants too much they will die or cause a fire. If you do it properly, they will make it through the freeze without any problems. Here are some tips for making the above methods actually work:

1. Only cover your plants when needed. If the temps are dropping close to a point of danger, lets say 33f for the mango, I do nothing to protect it. I believe that they will become hardier if allowed to come close to dangerous temperatures. If the NWS was wrong and it drops to 30F, then you get minor damage, so what, it will recover. Of course, when plants are very small I tend to protect them a little more.

2. Common sense measures: Stick your hand under the tree (where the heat source points) and feel the heat. If it feels to hot (hotter than the sun) than it probably is too hot and/or too close to the plant.

3. Do not use more heat than its needed: I have a $10 wireless thermometer that I stick inside the tree canopy to check the effect of my heating and covering on the temperature. You will get better at it as time goes on, I hardly ever use my thermometer any more.

4. Experiment before the freeze comes: Make sure you have what you need to cover and/or heat the tree. Remember, the cover should go all the way to the ground and be firmly secured in place.

5. It can be done: It sounds hard, but really it is about experience and instinct.

I have a very tender keylime tree here in Jacksonville that has grown from 1ft to 8 ft high and produces hundreds of limes without ever having a problem with a freeze. Of course, I protected when necessary, which frankly is not very often. I even pick limes in the winter.

Hi, I'm trying to figure out what type of lamp to use this winter to warm my mango tree. I've heard you can use infrared lamps but I've got no clue where to get one as I've just bought my first tree. Another person suggested Christmas lights (I've heard a lot of controversy on this one). I recently… ]]>