Here are some information

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Regardless of how well you take care of your container lemon tree, growing in a pot will be more stressful on the plant. You will need to keep an eye out for unique problems that container grown lemon tree can have.

Lemon trees growing in containers are more susceptible to sucker branches. These are branches that grow from the scion or root stock of the plant. Many times, in order to grow a hardier tree, nurseries will grow the desired tree on a hardy root. Under stress, the root stock will try to take over the tree. If you see a sucker branch grow from the bottom of the lemon tree, prune it immediately.

Another issue with lemon trees in containers is that they are more vulnerable to cold and drought.

While a lemon tree in the ground can take mild frost and cold, a lemon tree in a container cannot. A lemon tree in a container has a hardiness zone that is one zone higher than the USDA recommended zone. So for example, if the variety of lemon you are growing normally has a hardiness zone of 7, in a container, the lemon tree will have a hardiness zone of 8.

As already mentioned, allowing your lemon tree to dry out will cause more damage to it if it is grown in a container than if it was grown in the ground.

How Can I Get My Lemon Tree to Bear Fruit?

There are several cultural situations that prevent fruit. At installation, place the plant on the southern or western side of the home. Lemon tree fruiting will only occur in warm temperatures. Choose a well drained area with shelter from damaging and drying winds. Use thermal covers or even just an old blanket to protect new buds or little fruits when unexpected freezes occur.

Also, make sure the fertilizer you apply in early spring is formulated for citrus trees and is high in potash. Avoid excess nitrogen during the flowering period as this spurs leafy growth and minimizes the production of flowers.

How to Encourage Fruit on Lemon Trees

Water the tree deeply and frequently during fall and half the amount of irrigation in winter. Resume the deep watering in spring and summer as these juicy fruits need plenty of moisture to form.

Fertilize in spring with an appropriate food, including the addition of phosphorus to encourage blooming and fruiting, and prune only where necessary. Fruits set on the ends of branches, so it is best to remove only dead wood and problem branches.

Protect the tree from disease and insects and take appropriate steps at the first sign of trouble. Healthy plants produce the most fruit.

No Fruit on Lemon Tree After Cultural Attempts

If the lemon tree is still not producing fruits, it might be due to a poor rootstock. Dwarf stocks produce the best fruit and will bear more quickly than full sized trees. You can always wait a year after good cultivation and see if fruit comes the second year. This is especially true if you have neglected lemon trees. They may just need a little TLC for a year and then will reward you with a bumper crop of golden lemons