After establishing a greenhouse with the proper temperature, light, humidity, ventilation and irrigation characteristics, it is time to start growing. The important part now is to decide what will be grown and in what quantities. Since home greenhouses are usually small, it may be daunting to determine what plant, flower, herb, vegetable or fruit to grow. But if you start growing in a greenhouse, you can always transplant the plant to another location.
Choose easy-to-grow plants, which include lettuce, herbs, flowers, hot peppers, among others.
Determine how much room will be needed, as the greenhouse plants must be spaced properly for adequate air circulation.
Soak 2-inch peat pots in water for two minutes. Remove them from the water and fill with potting soil.
Plant two or three seeds in each pot, according to the package directions for planting depth. Sprinkle water lightly over the soil just to make it moist.
Keep the growing pots in eight hours of sunlight or grow lights daily. Water the seeds according to the seed packet directions, as different crops or flowers require different watering specifications.
Transplant the seedlings into larger planters when they are about 4 inches tall. Discard any seedlings that appear weak, broken or dead.
Fill the larger planters about halfway with potting soil. Place the entire peat pot into the soil. Fill soil in around the pot until it is within 1 to 2 inches of the top the pot. Continue watering as required.
Keep the greenhouse as clean as possible, throwing out any plants that die or become diseased. Keep the floor swept, make sure there is no standing water and discard of any plant clippings.
Keep the greenhouse well ventilated, especially in the warmer months. Do this by using a fan, a ventilation system or by moving the plants to a shadier area. Employ a space heater to maintain a consistent temperature in cooler months.