How To Grow Lemons Indoors

Do you live in an area with a dry climate and a little sunny days?

If your answer is yes, you probably know the struggle if you’ve ever wondered how to grow lemons indoors. It’s pretty challenging, and it may seem impossible, I know.

After a few times of trying to grow lemons inside the house and failing, I’ve finally managed to figure out the best way to grow them, and now I’m going to share my advice, tricks and tips on how to grow them.

What You Need To Grow Lemons Indoors

Before even starting to plant a lemon tree, you need to prepare and get everything you need for planting. The most important things are:

  • Organic lemon seeds or simply lemons (if you want to start from the scratch), or a small lemon tree
  • Slightly acidic soil mixture because lemons prefer a pH level that’s below 7
  • A small planter if you’re starting from the seed, if not, then you can purchase a pot that’s 25% larger than the tree and preferably deep.
  • You will need to purchase a bigger pot anyways even if you’re planting the seed because as soon as it starts developing roots, it will require replanting
  • Water with slightly acidic pH as well
  • Transparent plastic wrap if you’re planting the seed

Adjust The pH Level Of The Soil

If you want to be really precise in order to grow the lemon tree as you should, you can invest in a soil meter that will measure not only the pH level of the soil and water but also light intensity as well as the level of moisture inside the soil.

Also, it would be nice if you had a humidifier next to the lemon tree because lemons thrive in a humid climate and that can help a lot if you’re wondering how to grow lemons indoors in the best way possible.

Grow Lemons Indoors

When it comes to fertilizers, it would be the best choice to fertilize the soil every once in a while. More precisely, you should do it every six-seven weeks during winter and autumn and every three-four weeks during summer and spring.

Since lemons grow the best when they have a lot of nitrogen to consume, choose the fertilizers that are rich with nitrogen, but that don’t contain alfalfa meal since that can cause fungus.

Sunlight, Airflow, Watering

The most important thing to know in order to learn how to grow lemons indoors is that lemons prefer a lot of sunlight and need it to grow their best. That’s why you should hold your pot next to a sunny window.

If your area is mostly without sun, you can even use the grow lights to help your tree with the growth.

Personally, I prefer this grow light, but you can choose from a variety of grow lights on Amazon.

But before exposing the tree to both sunlight and grow lights, you should know for how long during a day to keep them under it.

Lemons thrive when receiving light for at least eight hours every day, even twelve if possible. After that, they need the dark time to consume energy and continue growing.

Also, it would be nice if there was a constant circulation of warm air through the leaves of the lemon because the lemon tree adores warmth and requires a temperature between 12.8 and 21 degree Celsius. Otherwise, the lemon will stop growing.

Don’t forget to always keep the soil moist and water your lemon three every week, maybe even more often. While they need damp soil for growing, lemons still hate overwatering so avoid paddles in the pot because that could kill them.

If you want and can, you should use a grow tent if you think that the climate in your area will be a problem. Grow tent can help you mimic the natural condition much more precisely and accurately.

After knowing all of this, it’s time to finally talk about how to grow lemons indoors and how to plant them.

Planting a Lemon Tree in a Pot – Step by Step

Step one

Prepare the nursery planter by filling the half of it with the acidic soil mixture that’s slightly moist.

Step two

Take the seed out of your organic lemon and clean it completely from the pulp. Keep in mind that the seed needs to be cleaned and planted as soon as taken out.

Step three

Insert the seed inside the pot, 1cm inside the soil, spay some water on top of it and then fill the rest of the container with the same, damp soil mixture.

Step four

Cover the planter with the plastic wrap and make some holes on the wrap. Then place it somewhere sunny and warm.

Step five

Once the seed starts to develop roots, which will happen after around two weeks, it’s time to replant your lemon in another, bigger pot. This process will be the same as if you were starting with a smaller tree so you can follow from there if you’re not starting from the seed.

Step six

Choose a good planter that will have drainage holes that will prevent overwatering of your lemon tree.

Step seven

Carefully take out your plant from the previous pot and make sure that the roots aren’t intertwined. This is important because the roots need to be in great condition to be able to absorb the nutrients from the soil.

Step eight

Fill half of the big container with the moist mixture as you did when planting the seed.

Step nine

Place the roots inside and spray a bit of water around the roots. Then it’s time to add the other part of the mixture

Step ten

Choose a nice, sunny corner in your home, take care of your new plant and enjoy while it’s growing the delicious and beneficial fruits.

How to Choose a Good Pot

This choice is very important because it could affect the growth of your lemon tree. If you want to learn absolutely everything on how to grow lemons indoors, you’ll have to know which pot size will be the best one for your three.

Namely, if the pot is too small, that will stop the roots from growing further, and it will eventually suffocate the tree.

If, on the other hand, the pot is too large, that could affect the amount of water you’re using, and you may end up under-watering your tree because there will be too much soil.

That’s why the container should be around 25% larger than the tree and deep enough to stay balanced once the lemons start growing.

Related Questions

1. How often should I prune the lemon three?

As you may know, pruning is a very important process when growing any type of plant which also means lemons. When it comes to removing dead leaves and branches from your lemon tree, you should do it very carefully and not too often.

The best solution would be to do it once a year. If you notice dead and dry leaves or any type of infection on the leaves and the tree, prune that part because it can seriously affect the lemon tree’s growth.

2. Do I need to pollinate lemon tree?

Even though your lemon tree will most likely grow lemons without the pollination, if you want larger and juicier lemons, you should pollinate your plant. Since indoors there won’t be insects to do it, you will have to help your lemon tree.

You can do it very effortlessly and by using only a simple paintbrush. You should transfer the pollen from the stamen to the pistil at least once a day and the lemon tree will need around nine months to harvest.


3. When is the time to harvest the fruits?

You can simply check if your lemons are fully grown by pressing them with your thumb. If the inside of the lemon feels soft, it is time to harvest them.

Also, the lemons will stop growing as soon as they’re good to harvest, and their color will be rich yellow.

4. The leaves on my lemon tree have become yellowish, what does that mean?

Yellow leaves are a sign that your tree isn’t getting enough water. That means that you should water your lemon more frequently and check the moisture level with the soil meter if possible. Only in this way you can be completely sure that the amount of water is right.

Final Word

If you think about all the benefits that an organic lemon tree has to offer, the effort of growing them indoors is more than worth it, do you agree? I know that I highly enjoy every glass of fresh home-made lemonade, especially during the long hot days.

Even though it’s a bit challenging at the beginning, I’m sure that anyone can learn how to grow lemons indoors in no time and have a lush and rich lemon tree that will be full of fruit.


Do you think it’s too difficult to grow lemons indoors? Have you ever tried growing a plant that’s a bit complicated to take care of inside the house? Let’s discuss it in the comment section below!