Thinning and Transplanting - Once seedlings develop their first set of true leaves (not just the initial seed leaves or cotyledons), thin them out by snipping the weaker ones at the soil line, leaving the strongest plants to grow. This prevents overcrowding and competition for nutrients. As the seedlings grow, gently brush your hand over them or use a small fan to simulate outdoor breezes—this helps strengthen their stems.
Before moving plants outdoors, they need to be hardened off to acclimate them to outdoor conditions. Start by placing them outside in a shady, sheltered area for a few hours a day, gradually increasing their time outdoors over 7-10 days. Expose them to more sunlight and gentle wind each day, bringing them indoors at night if temperatures drop significantly. After this process, they will be ready for transplanting into the garden.
Starting seeds indoors allows gardeners to enjoy a wider selection of plant varieties and ensures strong, healthy plants for spring planting. With proper care, your indoor-grown transplants will be ready to thrive in the garden, bringing a season full of fresh vegetables to your table.
For more gardening tips and educational programs, reach out to your local K-State Research and Extension Cottonwood District office—we’re here to help you grow!
Starting Vegetable Garden Plants Indoors:
A Head Start on Spring (continued)