Cyperus. If your houseplants repeatedly succumb to root rot, get yourself a cyperus. Cyperus plants have tall grass-like shoots topped with slender bracts that droop downward in an umbrella shape. Cyperus are natives of tropical swamps, so it's virtually impossible to overwater them.
Coneflower
Often self-sowing, coneflowers need little upkeep. These drought tolerant plants and thrive in almost any soil with adequate drainage. Plus, coneflowers attract birds and butterflies. These 15 water-wise plants thrive during dry spells.
Drought tolerance is one of the unique features of resurrection plants. They can survive for up to seven years without water in dormancy and lose up to 95% of their moisture content without cell or tissue damage.
Speaking to Real Simple, Blythe Yost said the secret to garden longevity is picking perennials. "Plants like peonies and iris will easily live on for 50 years if left undisturbed," said Yost, who is a landscape architect and CEO and co-founder of landscape design company Tilly.
Succulents
Their thick leaves store water, so they typically only require weekly watering (wait until the soil is dry before dousing them again). Succulents come in lots of varieties (like slender cacti, spiky sedum, smooth Echeveri, or flowering Kalanchoe), but typically enjoy sunlight and dry air.
Most plants that use very little water are often classified as succulents. Succulents are plants with thick, fleshy leaves and stems. These leaves lose very little water because they have a thick, waxy skin (called a cuticle) highly effective at storing water and not losing it, even in hot weather.
Newly planted hostas will need daily watering for the first two weeks. Once established, small or medium plants will need a good soak once a week. Hostas are drought tolerant, yet like moist well drained soil. If the weather is hotter, increase the watering to three times per week.
The elderberry plant is a good one to grow if you live in the eastern United States. According to the University of Vermont, elderberries can reduce erosion and help slow rapid water flow during floods. Some other good flood-resistance plants include iris, cattail, elephant's ear, and canna.
Ferns. Most ferns can tolerate excessively moist ground and are commonly grown in damp conditions, they would easily soak up all the water that you would provide. Ferns have a dense root system with the unique ability of water-absorbing foliage. The extensive root systems draw water and transport the foliage.
The good news is that most plants will bounce back between 7-14 days if they're given proper care (which includes rehydration). If this isn't possible because major damage was done or little healthy root system exists then expect about 2 weeks until improvement can be seen.
'From spring to fall, during the period of active growth, these plants should be watered once every seven to 10 days. In winter, when the light day becomes shorter, succulents go into dormancy, so you don't need to water them more than once every three to four weeks.
Geraniums are drought tolerant, so let the soil dry out a bit before you add more water. Overwatering will cause the leaves of annual geraniums to turn yellow and the blossoms to wilt. Reduce waterings if you are overwintering annual geraniums, but do not let the soil dry out completely.
But no, the agave americana is definitely from Earth. It's also known as a century plant because it only blooms once every 100 years (roughly) and then dies.
If you don't have flower food, 2 teaspoons of sugar per quart of water will do the trick. In a pinch, some websites recommend adding ¼ cup of clear soda to the vase (yes, like Sprite). Just make sure it has sugar in it—diet and “zero” beverages just won't do.
ZZ Plant. A ZZ plant doesn't need a lot of sun—you can even keep it in a room without any natural light. If you're the type who neglects plants, a ZZ plant can survive (and thrive) without water.
If the soil feels dry, it's time to water. In the spring and fall and in cooler climates, it might be sufficient to water container plants every two to three days. In the summer and in warm climates, container plants usually require daily watering, unless they are succulents or other drought-tolerant xeriscape plants.