Water the indoor hibiscus sparingly, and don't water until the soil is bone dry. Your hibiscus will need daily watering in warm weather. While cross-breeding has reduced the water requirements for many varieties, they do still need to receive adequate water in order to thrive. For example, Blue Hibiscus dies if its root run dries, but this plant needs full sun. During particularly hot weather, you may need to water an outdoor potted hibiscus twice a day. Removing the yellow leaves and adjusting your watering routine should resolve the issue. Phosphorus applied to the soil will not leach out and remains available for a long period. To make your hibiscus grow strong and produce many flowers, make sure to provide it with plenty of sun. That's a tough question because frequency of watering depends on a variety of factors, including the size of the plant and the size of its pot, the type of potting mix it's growing in, how much sun it gets, and temperature. Or, if you use a drip-type watering system, fertilizer injectors are inexpensive and easy to add to your system. Depending on the size of the hibiscus, you may need to use more than one soaker hose. If you see yellow leaves, don’t panic: the plant is not ill, it just means that something is wrong. Place the others 6 inches apart until you reach 1 foot beyond the drip line. Observe your hibiscus closely for signs of under- or over-watering. With so much information included here, it … A lot of folks ask us how much they should water their hibiscus. Depending on heat, wind, and humidity, your plant may need to be watered daily, or even twice a day in extremely dry conditions. In mid-summer, heat will go up, so sun should go down and water should go up. Soil in planting pots tends to dry out quicker than the soil in the flower bed, so you’ll need to water both hibiscus types more often if they're planted in pots. Put the hibiscus where it will be in bright sunlight for 6 to 8 hours each day. Never use cold water on hibiscus plants. For example, Blue Hibiscus dies if its root run dries, but this plant needs full sun. Dig a narrow hole, 6 inches deep, at the drip line. Remember what we said - heat, sun and water need to be in the proper proportions for best performance by hibiscus. © Copyright 2020 Hearst Communications, Inc. The hibiscus tea is deep red in color. Imagine a sponge that you’ve wrung all the water from to get an idea of the moisture content of the soil required by both types of hibiscus. Time how long it takes until the bottom of the hole is moist to determine how long to run the hoses. Hardy hibiscus plants differ from the tropicals not only in the amount of cold they can tolerate but in some of their care requirements as well, advises University of Florida IFAS Extension. Watering a hibiscus too much during winter will make it chlorotic. Sprinkle around the plant and water in or mix in water and use as a foliar spray. During the winter, hibiscus require less water. Always plant them in pots with drainage holes in the bottom. (Stick your finger in the soil to check.) it is a tropical that loves water just make sure you do not let it sit in water for a long peirod of time Similarly, few individuals prefer to drink cold tea. The average root depth of the hibiscus is 6 inches, so you’ll need to soak the soil to that depth when you water them. Determining how much water does a hibiscus need may be really tricky. Below are some of our most successful Valley favorites: Brilliant Hibiscus / San Diego Red Hibiscus (Hibiscus rosa-sinensis 'Brilliant') This hibiscus plant produces bright red flowers that will add a pop of color to your garden.This plant will grow 8-10 feet tall and 4-6 feet wide and is ideal for landscape borders, containers and cut flowers. While you're waiting for it to heat … Dilute a cup of vinegar in a gallon of water and pour the whole solution onto the roots of the plant. Hibiscus fertilizer ratio: Medium (N) – Low (P) – High (K).