Water a Ficus lyrata only when the top 2 inches (5 centimeters) of soil are dry. Skip the fixed weekly schedule. Calendar watering is the fastest way to drown this plant. The room, the light, and the season all change how fast the pot dries out. The whole point of watering ficus lyrata is simple. You check the soil first and let the plant tell you when it needs a drink.
The check takes ten seconds. Push a clean finger or a wooden chopstick straight down into the soil to about the second knuckle. Dry soil at that depth feels crumbly and powdery, and a chopstick comes out clean with nothing stuck to it. Damp soil feels cool and a little spongy, and a chopstick pulls out with dark grit clinging to the side. If you feel any moisture down there, wait. If it comes out dry, it is time to water.
Being conservative matters because soggy soil is the single most frequent cause of failure with these plants. When the roots sit in water, they cannot pull in air, and they slowly suffocate and rot. That root rot spreads quietly under the surface, so by the time you notice mushy stems or a sour smell, the damage is already deep. Roots that can breathe between waterings stay firm and white, and a plant with healthy roots shrugs off most other problems.
Well-draining soil is your safety net here. The mix should hold a little moisture and let the rest run straight through. The New York Botanical Garden advises watering when the top 2 inches go dry. Let the runoff drain within about 15 minutes so the roots never sit in a soaked pot. A chunky mix with bark, perlite, and some peat does this far better than dense bagged soil that stays wet for days. Always use a pot with a drainage hole, and dump out any water that pools in the saucer.
Push a finger or chopstick down about 2 inches (5 centimeters). Water only if that depth feels dry.
Pour slowly until water flows out the drainage hole. This wets the whole root ball, not just the surface.
Let excess run off and empty the saucer within 15 minutes. Never leave the pot standing in water.
Leave the plant alone until the top 2 inches dry out again. The wait stretches longer in winter and low light.
How many days fall between waterings is the wrong question, because it changes with the conditions. A plant in bright summer light might dry out in five or six days, while the same plant in a dim corner during winter can go two weeks or more. Cooler months and low light slow the soil down a lot, so check more often and water less. Both extremes hurt the plant. UC ANR notes that over and underwatering both cause leaf drop, which is why the finger test beats any rigid routine.
Watch the soil itself for warning signs. Penn State Extension warns that you should never let the soil pull away from the pot wall. Once it shrinks back and leaves a gap, water just races down the sides and out the bottom. It never soaks the roots at all. If you see that gap, your plant has gone too dry. Set the pot in a basin of water for half an hour to rewet the mix from the bottom. Then go back to the top-2-inch test. Stick with that one habit and your watering ficus lyrata routine will be far harder to mess up.
Read the full article: Ficus Lyrata Care: Complete Guide