Hello. I grew a plant from an avocado pit. It’s grown well but it’s getting so tall. Almost 15 inches with only two real leaves, though a few more seem to be coming in. Some sites have said to cut the top leaves to encourage it to be bushier. Should I continue to wait until I get more leaves?
The reason for the stem will be a severe lack of light. If this sits in the brightest spot that you have available, then it will be necessary to use a horticultural lamp. 200 watts will keep the tree happy until it gets too tall to fit under the light.
If it were me, I would start over with a new seed. Once a plant starts to stretch that significantly, it will start to cause problems for itself. Often, they will continue to stretch, and break under its own weight eventually.
Should you choose to cut it, the tree will sprout a replacement, or two. They can originate from the seed, or the existing stem.
The most important thing will be to increase the light, whichever option you choose.
Here is an article that will help you to care for young avocado plants:
the avocado plant is in my kitchen by a window and seems to be doing very well except for the bites on the leaves.
Mites are the biggest pest of avocado leaves but their damage is more like speckling on the leaves, not holes. Outside of course you have caterpillars, snails, grasshoppers and June beetles that leave holes, as well as moth larva. Unless something can get in the window, I'm not finding indoor pests that leave holes. Your typical indoor pests like aphids, mealybugs and scale would be visible on the leaves.
You might try doing some night time investigation with a flashlight and see if you see anything bothering your avocado tree. Another possibility is fungal spots that have dropped out of the leaves, leaving a hole.
You might give your tree a spray with Neem oil, which combats fungus as well as pests. Another option is contacting your local university extension service, who might have more ideas.