A hydrogarden is an indoor garden that grows plants using hydroponics, meaning plants grow in water with added nutrients instead of soil.

In a hydrogarden, plant roots receive water, nutrients, and oxygen directly, which supports steady growth indoors. Most hydrogardens include a water reservoir, plant holders or baskets, and often LED grow lights to replace sunlight.

Hydrogardens are commonly used for herbs, leafy greens, salads, and compact edible plants because these plants grow well without soil and do not need much space. Many modern hydrogardens are designed as smart gardens, which automate lighting and watering to make indoor growing easier.

In everyday use, a hydrogarden is simply a convenient way to grow fresh plants indoors year-round without traditional soil gardening.