Beautiful houseplants can be grown from orange, tangerine, lemon or grapefruit seeds. Or, if you have access to adult plants, you can take cuttings and use them to reproduce new plants.
To grow a plant from seed, fill a 75mm pot with a good mixture of soil for planting and sow a few seeds at a sufficient distance from each other. Water them well, and cover the pot with plastic wrap to keep it moist and place it in a warm place in the house - for example, on a shelf above the radiator. The seeds germinate for four to six weeks, and when they sprout, gradually expose them to light. Above them, place fluorescent lamps at 250 - 300 mm and illuminate them for 15 - 16 hours a day. You can also place them next to a well-lit window, only they should not be exposed to direct sunlight.
When several leaves develop on the shoots, carefully transplant them into separate pots filled with transplanting compost. Keep them in a warm place and they will grow steadily - 100 to 150 mm in a few months. But it can take many years until they start to bloom indoors.
For cuttings, cut a 75-150mm long stem cuttings. Dip one end of each cuticle into the hormone rooting powder and plant them in separate small pots with an even mixture of peat moss and coarse sand or perlite. Moisten the soil well, then wrap the entire pot in a polythene bag and place in a medium-lit place, at a temperature of 1 8 - 24 ° C. It will take about six to eight weeks for the plant to take root, after which you will remove the bag and keep the soil moist until you notice a new shoot at the tip of the cuttings.
The young plant is now ready to receive monthly nutrition in the form of liquid nutrient diluted to half its strength. When you notice that the roots have erupted through the holes to drain excess water in the pot, transplant the plant into a larger pot filled with a mixture of flowering compost and soil. Nurture the plant the same way you nurture the adult from which the cuttings originated.
Keep the plants in a sunny location. Do not store them in winter when there is not enough light. Water moderately and keep the plants above 10 degrees Fahrenheit.