How to Water Indoor Plants the Right Way

Knowing how to water indoor plants might sound simple enough, but many of us struggle to do it correctly. Variables can make it tricky to know exactly when—and how often—to water your plant, not to mention how much water each plant needs. Here, you'll learn how to water indoor plants properly, learn the best kind of water to use, and recognize telltale signs of overwatering. Following our guidelines, you'll never have to deal with crispy, dried-out leaves or mushy, brown plants again.

How Much to Water Houseplants

Not all plants need the same amount of water, so if you're not sure how much your specific varietals need, take cues from their natural habitats. Many popular houseplants, like philodendrons, come from tropical regions of the world where it rains regularly. These species usually have big leaves that require a lot of water to look good. Plants like these will need more water than desert denizens, like cacti and succulents, which often do better when you let the soil dry out between waterings.

The time of year can make a difference, as well. Many indoor plants grow more during the spring and summer but not as much in the fall and winter. If you notice less growth than usual, ease up on how much water you give your plants until they start growing more again.

When to Water Your Indoor Plants

As a rule of thumb, if you see any wilting leaves, it's time to water your plants—but you don't want to let them get to this point. They won't look as good, and it makes them less able to fend off diseases. Instead, make a habit of checking on your houseplants at least once a week to see if they need a drink. You can also use an app like Waterbug or Happy Plant to help remind you when it's time to make your rounds.

The best way to tell if your plants need water is to stick your finger about an inch into the potting mix—if it feels dry, break out the watering can. If you detect dampness, check back again in a day or two. For smaller houseplants, you can also pick up the whole container. If it feels light for its size, add water. Then, lift it again, and you'll get a sense of how heavy the pot should feel when the soil is saturated.

Timing is essential when deciding how to water indoor plants. Watering in the morning is preferable to the evening because any extra moisture that gets on the leaves will have a chance to dry and evaporate throughout the day when temperatures tend to be warmer. The longer excess wetness sits on plant leaves, the higher the risk of diseases taking hold.

Best Water for Indoor Plants

When watering your houseplants, the type of water you choose depends on a few circumstances. Most tap water should be fine for houseplants unless it's softened because softened water contains salts that can build up in the soil over time and cause problems. Chlorinated water is also safe for most houseplants, but if you have a filtration system, that's much better for your plants. Another option is collecting rainwater to use.

No matter which type of water you choose, the best methods for how to water indoor plants always include using room-temperature water. Either extreme (very cold or hot water) can damage your houseplants' leaves and even cause the plant to go into shock.

How to Water Indoor Plants

Your room-temperature water is ready to go, and the soil feels dry, so now what? You may be tempted to dribble on a bit of water to avoid overwatering, but this won't help your plants much. Because most of the roots aren't right at the soil surface, the best way to water indoor plants is to pour on enough water to thoroughly soak the soil around each plant, continuing until water starts to run out of the container's drainage hole at the base. If you catch the extra water in a saucer, sometimes your plant's soil will absorb a bit more while it sits in it. However, make sure to dump out the saucer after about 10 minutes, or your plant's roots may rot.

Another option for how to water indoor plants is to fill the saucer or other type of basin with water and put your plant containers inside to soak up water from their base. You'll see that the water will soak into the soil through the drainage holes in a few minutes. Keep filling the saucer until the water no longer gets absorbed. This is the ideal method for watering plants that don't like wetness near their stems, such as cacti, succulents, and African violets.

How to Tell If You’re Overwatering Your Indoor Plants

There's a reason pots have drainage holes. Too much water will deprive your plant's roots of oxygen, causing them to drown and die. Even with good drainage, keeping the soil constantly wet can make it hard for air to reach the roots. There are a few ways to tell if you are overwatering your plants before it's too late to save them.

No new growth and yellowing leaves dropping off can be signs of overwatering. You may also notice wilting, which can be confusing because that is also a sign of too little water. The trick is to check the soil when you notice these problems—a plant moisture meter can definitely help. If it feels wet, you probably should go easier on the water. If the soil is dry, you may need to give your plant more water.

You can also use your nose to determine if you have an overwatering problem. Lots of moisture encourages fungi and bacteria to grow in the soil, which can cause unpleasant odors, especially when roots are rotting. If you spot any fungus gnats flitting around your plant when you water, you've likely been too heavy-handed with the watering can.

If you think you've been overwatering, it doesn't necessarily mean your plant is doomed. Just let the soil dry out a bit before watering again, then start following the watering techniques we describe above. If that doesn't help your plant bounce back, you can also try repotting it with fresh soil after cutting away any dead or mushy roots with a pair of pruning snips.

Make Other Adjustments

You may need to look to adjust the temperatures or light levels your plant gets. You can move your plant nearer a window to get more sun or invest in a grow light for plants that aren't getting enough natural light. Some plants need different amounts of light at different stages of growth, so be sure to get the right type of grow light for your indoor plant. Grow lights can make a big difference in how well your indoor plant does.

Knowing how to water your houseplants definitely requires some experience. The more you do it, the better you'll get at caring for your indoor garden. Try starting with a few varieties that are tough to kill. Then, once you've mastered the basics and feel more confident in your watering skills, you can try taking on a few plants that are more challenging but totally worth the effort.