[Huliwang]

Hey, you know why my kaffir plant doesn't bear any fruits? I've had it for years but never once had a single fruit.

Yours may be male tree.......

[surfer]

Hey, you know why my kaffir plant doesn't bear any fruits? I've had it for years but never once had a single fruit.

You add any fertiliser?
I have the fruit every now and then the largest was about the size of a tennis ball. Any bigger it’ll drop to the ground.

[Blasterlord2]

You add any fertiliser?

Yah.. and the plant is growing very well, just no fruit.

[Blasterlord2]

Yours may be male tree.......

I suspect so. But dunno whether there's such a thing or not.

[surfer]

I suspect so. But dunno whether there's such a thing or not.

Any flowers on the plant?

[surfer]

Yah.. and the plant is growing very well, just no fruit.

Apply those liquid fertiliser for flowering plants. Hopefully your plant will have flowers which will then be pollinated by insects to give you the kaffir lime .

[Blasterlord2]

Any flowers on the plant?

No flowers at all

[Huliwang]

I suspect so. But dunno whether there's such a thing or not.

A lot of trees are both male and female, so these types of trees have no bearing fruit problem.
However, there are also a lot of trees that are solely male or solely female. You cannot tell their genders until they bear flowers. The flowers give clues to whether they are male or female. .....

[WhatDoYouThink?]

Hey, you know why my kaffir plant doesn't bear any fruits? I've had it for years but never once had a single fruit.

grown from seeds, or cloned from mother plant? from seeds will take 4 yrs or more, clones are faster.

besides long hrs of sunlight and good drainage, ferterlizers with phosphorous, potassium and a host of trace elements are needed. that's why commercial farming is easier to mass produce because chemical ferterlizers are cheap, whereas organic way very difficult. 

if the tree grows very well with plenty of leaves, too much nitrogen types of ferterlizers which inhibits the intakes of other nutrients

one trick you can try is to do ring cutting on the trunk

[dynamite]

Hey, you know why my kaffir plant doesn't bear any fruits? I've had it for years but never once had a single fruit.

Either your soil no nutrients, or no sun or no water. Or can be more than one.

[dynamite]

I have just collected some fresh vegetables for eating.