Pea eggplant. The small pea eggplants look very similar to green peas and are used in Thai cooking.Sow seeds indoors 8-12 weeks before last frost date. Planting depth is 1/4”. Optimal soil temperature for germination is 85ºF. Germination is apparent within 7-14 days. Eggplant should not be put outdoors until daytime temperatures are at least 70ºF and night time temperatures are above 50ºF. "