Types of Plants That Can Be Grown at Home: There are plants that can tolerate a lack of irrigation water, and this factor is influenced by the distribution of the plant's roots. It is noted that plants with deep roots, such as (tomatoes, butternut squash, sweet potatoes), require small amounts of water. On the other hand, plants with shallow roots, such as (potatoes, onions, cabbage, cauliflower, zucchini, garlic, lettuce, parsley, spinach, radishes), require more water.