Hi Jeff, welcome to the forum. I checked your profile and did not see any information on your local. Please update and include your county and state. That information lets the forum members provide you with better advice and information.
From your description I am guessing that you planted from seed probably from a store bought or gathered Meyers Lemon. A fun experiment that can result in an attractive ornamental plant. Meyers Lemons are hybridized so do not set high hopes for edible fruit.
Is your seedling in a pot? If so how large, what kind of soil, drainage and where is it located?
Your growing region (county and state - not just USDA zone) is very important when growing citrus and fruit trees. Fruit tree varieties are VERY region specific. Citrus is grown in the south/deep south unless green housed over winter.
Fruits and citrus do best if you plant grafted trees. Young trees are usually available in 3/5 gallon containers and are 3/5 years old.
Example: I live and grow in Lafayette, La. - deep south. 4 years ago I planted a 3 gallon Satsuma in February. Proper planting time for my region. The hole was no deeper than the root ball but 5 times wider. G was NOT happy about digging that hole. The existing soil was not amended nor was any fertilizer added. The tree flowered but I removed all of the flowers and did not let it develop fruit nor did I do any pruning. The first year the focus is on root development. The only thing I did that first year was make sure it had adequate water.
The following winter we had not one but TWO hard freezes. The temperatures remained below freezing for more than just a few hours. I paid attention to the thermometer and when the temperature dropped below 32 degrees I used a hose end sprayer to cover the entire plant with water which immediately froze creating a shield of ice. Even though the temperatures dropped into the low 20's the core temperature of the tree did not get below 32 degrees. Commercial growers in Florida do this to protect their groves when they have a freak freeze.
Second year: I fertilized with 8-8-8 in mid February and again in May. In the fall I harvested a couple of dozen nice Satsuma.
Third year: Fertilized with 8-8-8. Had an arborist out to inspect an enormous, very old, southern live oak. He recommended applying Ammonium Nitrate to the yard because the tree was sucking huge amounts of nitrogen out of the soil. My mistake - I applied the Ammonium Nitrate too close to the Satsuma. I had lots of beautiful foliage growth but only produced 4 fruit.
I should have known better.
This year: 8-8-8 in February. No pruning other than a sucker from the root stock. The tree has lots of blooms.
Hopefully a nice crop of fruit in the fall.
Sorry! Ramble, ramble.
My point was that even in the deep south Citrus trees need protection form crazy weather.
Jeff - provide more information and decide if you want an ornamental Citrus or a producing Citrus. If you want fruit and you live in a region that is suitable for Citrus growth and production or you will be green housing your tree over winter then really consider purchasing a grafted tree.