We find the best way to judge whether your houseplant needs to be watered is to stick your finger down into the soil. If the soil is dry, water enough to saturate the soil but NEVER allow your plants to sit in water. To take all of the guess work out of it, Wedel’s carries moisture gauges that tell you exactly when your plants need moisture. Most houseplants will need to be watered every five to seven days. Some thirsty/heavy drinkers are hibiscus and gardenias. Some examples of plants that prefer dryer soil are succulents and cacti.