Step 3. Plant it about half an inch down in the midst of the pot, and then seal the soil directly above it with a gentle spray of water. Step 4. Cover the pot with clear plastic wrap, seal the edges, and poke small holes in the highest earlier than putting it in direct sunlight. Remember to keep hydrating. About two weeks later, a seedling will emerge. Take the plastic protecting off, but proceed to keep the soil damp. Make sure the younger plant gets eight full hours of light per day and interment doses of natural fertilizer as needed. When the plant outgrows its seedling pot, put it in a planting pot and make sure to repeat the watering steps above. Older plants want less water than their younger counterparts but do keep the soil moist and fertilized nonetheless. After their third year, wholesome lemon trees start to supply fruit.