Meyer lemon trees thrive in United States Department of Agriculture hardiness zones 8 through 10. Unfortunately, Oklahoma falls within zones 6 and 7, making it too cold to grow Meyer lemons outdoors, but that doesn't mean you can't grow them indoors. Meyer lemons are on the small side, but there are also dwarf varieties that you can buy at nurseries, some garden centers and home improvement stores that do very well as houseplants. Keep your indoor Meyer lemon tree well hydrated and exposed to full sunlight.
Buy a young Meyer lemon tree from your local nursery. Look for a tree that is about two to three years old with healthy green foliage and strong limbs. Avoid any trees with brown or withering leaves and dry, scaly bark
Prepare a 10- to 15-gallon planting container that has drainage holes and an overflow tray. Fill the bottom with 2 to 3 inches of gravel or crushed rock. Fill the container half way with a mixture of equal parts peat moss and potting soil.
Remove the young Meyer lemon tree from its container and place it in the prepared planting container. Hold the tree upright and fill the container the rest of the way with the peat moss and potting soil mixture. Work slowly and pack the soil in around the root ball with your hands. Water the tree immediately so that the soil is moist.
Place the pot in a warm room in full sunlight, preferably in front of or near a window, so that it gets at least 8 hours of sun every day. Water the tree regularly to keep the soil moist. Mist the leaves and limbs with a spray bottle to keep them clean and moist.
Feed your Meyer lemon tree with a fertilizer formulated for citrus trees (20-10-10 type) around late winter, mid spring and midsummer. Follow the instructions on the packaging for specific information on amounts to use for container plants.