Hydroponic gardens are compact and can be placed anywhere. A home hydroponic garden design provides a method of growing plants in water. They use and re-use water over and over and require minimal additional water to function properly. Hydroponic garden design involves growing plants without soil in a nutrient enriched liquid. Hydroponic garden design also eliminate the need to watch for garden pests such as aphids, caterpillars, potato beetles and fungus.If you want to create a homemade hydroponic garden, you can either purchase soil-grown seedlings or start your own from seeds to create starter plants for the garden. The best time to transplant the seedlings is when they reach a height of 2 to 3 inches and have their first true leaves.