Pink variegated lemon trees also grow well indoors and are beginner-friendly. Buy a lemon tree at least 2-3 years old, as young trees may not grow as well indoors. Although you can grow lemon trees from seed, they are less likely to adapt to indoor climates and will not produce the same as their parent tree. [3] X Research source
The pot depth determines how large the lemon plant can grow. About 15 gallons (57 L) is the minimum recommended pot size. [5] X Research source Choose a pot that has drainage holes to prevent your plant from getting waterlogged.
You can cut a strip of landscaper’s cloth and place it at the bottom of the pot to keep it from leaking dirt into the saucer. Replace the cloth when you transplant the tree so you don’t clog the hole.
Soils meant for cacti will also work well for citrus trees.
If you’re in a location that doesn’t get a lot of sun, set up a grow light near the plant and leave it on for up to 12 hours a day.
Pull carefully to avoid damaging or breaking off the roots.
Bury the tree at the same level as it was in the older pot. Avoid covering the trunk with soil, as this can cause fungal infections.
If using hard tap water, you may need to drop the water’s pH before giving it to your tree. Adding 1 tablespoon (15 milliliters) white vinegar to 1 gallon (4 liters) of water will usually do the trick. If your tree’s leaves are curling, your tree needs more water.
An NPK fertilizer of 2-1-1 works well for citrus trees. Do not use fertilizers containing alfalfa meal or cottonseed meal. Fertilizers containing these meals can cause fungal diseases.
Lemon trees can be pruned year-round when grown indoors. [12] X Research source
Misting your lemon tree with water several times a week or when it rains can also restore the plant’s humidity levels. If you live in a humid location, you may be able to get enough humidity from opening a door or window.
Repeat this process once a day to ensure pollination. Most lemon trees take 6-9 months to harvest after being successfully pollinated. [15] X Research source Your lemon tree may produce fruit even if you don’t pollinate it, but the fruit will be larger if it is pollinated. [16] X Research source
Too many lemon clusters can drain your tree of energy and stunt all of the fruits’ growth. Many trees will drop fruit on their own. Wait a few months before removing any fruit.
The fruits can be left on the tree for awhile without becoming overripe. The fruits will usually stop growing once they’re ready to harvest. They should also be a rich yellow color. [18] X Research source
Pull or cut gently to prevent damaging your plant.
If you want to store your lemons for longer, squeeze the juice and store it in an airtight container for 4-6 months in a fridge or freezer.
Keep the roots moist while you walk by spritzing them with water from a spray bottle. Repot the tree and prune approximately 1/3 of its foliage to balance out the pruned roots.
