Ghost peppers thrive in a warm, humid environment where the temperature is 70 °F (21 °C) or higher for at least 5 months out of the year. If you're worried about colder temperatures, plant the seedlings in pots or raised soil beds so the soil they're in stays warmer. If any of your plants are withered, diseased, or browned, pull them out of the soil. That way, there will be more room for healthy plants to grow. If you're going to plant the seedlings outside, acclimate them over a 10 day period by moving them outside for a few hours a day. Leave them outside for one hour longer each day. To plant the seedlings, dig a small hole in the soil just larger than the seed pod. Place it in the hole and pack extra soil in the space around it. Water it well when you're done.  A 4 in (10 cm) pot will be fine for a pepper seedling at first. If you are putting your seedlings in the ground, just space them 12 to 48 inches (30 to 122 cm) apart. You can move your plants into larger containers later on if the original container becomes too small. Ghost peppers need soil that is always slightly damp, but not soaked through. Water as often as you need to keep it in this condition. The exact frequency will depend on your location and the weather conditions.  For best results, water in early morning or after the sun starts to set. Add a layer of mulch around the plants to help the soil retain moisture. You can find this at your local garden store. Mix the fertilizer according to the package instructions, then add it to the soil around your plants. Fish and kelp fertilizer is a great organic option for nurturing your pepper plants. When you start to see flowers (which will be small, light colored, and have pointed petals) on your plants, switch to a fertilizer with higher phosphorus and potassium content to help encourage pepper production.  Look for a fertilizer that is labeled 20-20-20. These numbers refer to the proportions of the minerals nitrogen, phosphorus, and potassium. Avoid high-nitrogen fertilizers, since these will cause the flowers to fall off, and you plant will not produce peppers. You can find good options for organic fertilizers at most garden stores.
Plant seedlings in the ground in areas that are warm most of the year. Thin the seedlings by plucking the weak ones. Move your seedlings to containers or into the ground. Water your plants frequently. Add fish and kelp fertilizer to help the pepper plants to grow. Switch to phosphorus-potassium fertilizer to encourage pepper growth.