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An outdoor spot that receives full sun is ideal, as both the light and sun are essential in promoting a good harvest. Eggplants thrive in warm soil. In hot, dry weather, your plant may even need multiple waterings a day. Feel the surface of the soil with your finger tips and saturate the soil if it appears dry. Allowing the soil to dry out will reduce the number of eggplants you can grow. Use a water soluble fertilizer and water your eggplant before adding it to the soil, rather than adding it to dry soil. Follow the directions on the back of the label to determine an appropriate amount.  If the leaves of your eggplant begin to pale, you may need to add more fertilizer. A boost of 5-10-5 fertilizer should help significantly if a lack of nutrition is your plant's only problem. A fertilizer with a higher number, meaning a higher percentage of nitrogen, phosphorus, and potassium, may prove too strong. Do not dig any deeper than 1/2-inch (1 1/4 centimeters) beneath the surface of the soil when scratching in fertilizer. Digging any deeper than that could disturb the eggplant's roots, which are rather shallow. Soil with a pH between 5.8 and 6.5 should fulfill your eggplant's needs. Litmus paper or a pH meter should be able to give you an accurate reading.  If you need to increase the pH, try using agricultural lime. If you need to decrease the pH, add additional organic matter such as compost or plant litter, or switch to a fertilizer with urea in it. As your plant begins to climb, loosely tie the stem of the plant to the stake using twine or thin fabric thread. Tying the thread too tightly may cut into the stem or choke it. Cutworms are one of the most common pests that attack eggplants, but they can usually be driven away by placing a cutworm collar over the plant. You may also consider an organic pesticide to drive away cutworms and many other pests. The fruit should stop growing larger and, in many cases, it will be around the size of a large orange. The length of time this takes varies depending on the variety you chose, but your eggplant will usually be ready for harvest within two or three months after you initially planted your seeds. Snip the eggplant off its vine using pruning shears. The vegetable should only have a short stem upon removal.
Place your pot in a sunny location. Water your eggplant daily. Add a liquid fertilizer once every one or two weeks. Monitor the soil's pH. Tie your eggplant to the stake to promote upward growth. Keep an eye out for pests. Harvest your eggplants once the skin looks glossy.