Indeterminate tomatoes are a type of tomato plant that continues to grow and produce fruit throughout the growing season. Unlike determinate varieties, which stop growing once they reach a certain height, indeterminate tomatoes can grow tall and require support, such as stakes or cages, to keep the stems upright. They typically produce fruit in waves, allowing for a longer harvest period. These plants thrive in warm climates and can reach heights of 6 to 10 feet or more. Indeterminate tomatoes are popular among gardeners because they yield a continuous supply of fresh tomatoes, making them ideal for home gardens and larger-scale farming.