Start planting eggplant seeds indoors, and plant them outdoors in a sunny outdoor spot once outside temperatures have warmed to at least 70 degrees Fahrenheit. Add compost to the soil after tilling it.
- Start the seeds indoors
Plant the eggplant seeds eight weeks before the last frost date by sowing them in flats filled with soil-based potting mix. Lightly cover the seeds with the soil mixture. Place the flats in a warm spot that gets at least 12 hours of sunlight daily. Transplant the seedling to individual pots once they are 3 inches tall. Alternatively, you can buy transplant-ready eggplant seedlings from a nursery.
- Prepare the seedling for planting
Harden-off the seedling by placing it in a sheltered outdoor spot for 2 to 3 hours before bringing the plant back inside. Gradually increase the sun exposure and the amount of time the plant is left outside every day.
- Prepare the planting area
Dig or till the soil in a sunny planting area to loosen and aerate the ground. Mix in several inches of compost or composted manure to enrich the soil.
- Plant eggplant seedlings
Once the soil is 70 degrees Fahrenheit or warmer, dig a hole of the same depth as its current container. Mix time-released fertilizer in the soil, place the plant in the hole and fill it with soil. Cover the ground with a layer of mulch after watering the plant.