Harden off your seedlings. Seeds that are grown indoors are used to a constant temperature with little fluctuation; when they are introduced into the ‘wild’, they can experience a bit of shock from the varying temperatures, moisture levels, and changing sunlight. Harden them off by placing their pots or trays outdoors for a few hours every day. Start at only 2 hours a day for about a week, and then add one hour to each additional day they are placed outdoors until they can stand being outside for a full 24 hours. At this point, they can handle being planted outside without fear of shock.