Houseplants are one of the easiest ways to make a home feel more alive, calming, and inviting — but watering indoor plants is also where most people run into trouble.
The tricky part? Indoor plants do not dry out on a perfect schedule.
A plant in a bright, sunny room with dry air may need water twice as often as the same plant in a cooler room with lower light. Pot size, humidity, airflow, heater usage, window exposure, soil moisture, and even the size of the rootball all affect how quickly a houseplant dries out.
That’s why the best way to water houseplants is not by following a strict calendar — it’s by learning how to recognize when your plant actually needs water.
This guide will walk you through:
- How to properly water indoor plants
- How to tell if your plant needs water
- Signs of overwatering vs underwatering
- Why some houseplants struggle indoors
- Watering tips for Simply Trees’ most popular houseplants
- Common beginner mistakes to avoid
Whether you’re caring for a large indoor tree or a smaller tropical houseplant, this guide will help you water with confidence.
Why Houseplants Are Different From Outdoor Plants
Outdoor plants benefit from:
- Rain
- Natural airflow
- Morning dew
- Ground moisture
- Seasonal humidity
- Stronger sunlight
- Larger root zones
Indoor plants rely entirely on you.
Inside the home, plants are exposed to:
- Dry HVAC air
- Ceiling fans
- Artificial lighting
- Low humidity
- Decorative pots
- Limited root space
- Inconsistent sunlight
This means indoor watering needs can change dramatically depending on the environment.
A houseplant near a bright south-facing window may dry out much faster than one several feet away from the same window.
The Biggest Houseplant Watering Mistake
The most common mistake beginners make is watering on a fixed schedule instead of checking the soil first.
Watering “every Sunday” may work one week and completely overwater the plant the next.
Your plant’s watering needs change depending on:
- Season
- Sunlight
- Humidity
- Temperature
- Pot size
- Plant maturity
- Rootball size
- Airflow in the home
A large indoor tree with a dense 14-inch rootball will need significantly more water than a smaller plant with a shallow root system.
SIMPLY TREES PRO TIP:
A larger rootball does NOT mean “water more often.”
It usually means the plant needs a deeper, more thorough watering when it does need water.
How To Tell If Your Houseplant Needs Water
Instead of watering on a schedule, check the soil first.
The Finger Test
Insert your finger into the soil about 2–3 inches deep.
- If the soil feels damp or cool, wait to water.
- If the soil feels dry at that depth, it’s usually time to water.
For larger indoor trees like Benjamina Ficus or Fiddle Leaf Figs, check deeper near the rootball whenever possible.
The surface of the soil may appear dry while the lower root zone is still wet.
Learn The Weight Of Your Pot
One of the best ways to understand your plant’s watering needs is by lifting the pot.
- A freshly watered plant feels noticeably heavier
- A dry plant feels lighter
Moisture Meters: Helpful or Not?
Moisture meters can be helpful for beginners, especially with larger indoor trees where deeper soil moisture is harder to check manually.
However, they are not perfect.
Moisture meters can sometimes:
- Give inconsistent readings
- Struggle in compacted soil
- Misread around rootballs
They work best when combined with:
- The finger test
- Pot weight
- Observing the leaves and soil
How Much Water Should You Give?
This is where many indoor plant problems begin.
Some customers accidentally overwater by watering too often.
Others underwater by giving very small amounts of water that never fully soak the rootball.
For example, a large Benjamina Ficus with a substantial root system may require a deep saturation of the soil — not just a small cup of water.
We’ve seen customers give large indoor trees only a few ounces of water, which may barely moisten the top layer of soil while the majority of the rootball remains completely dry.
Proper Watering Method
When watering:
- Water slowly and evenly around the soil
- Fully saturate the rootball
- Allow excess water to drain from the bottom
- Empty standing water from decorative pots or saucers
The goal is to hydrate the entire root system — not just the top inch of soil.
SIMPLY TREES PRO TIP:
A quick splash of water often creates shallow roots and inconsistent moisture levels. Deep watering encourages healthier root development.
Decorative Pots Without Drainage
One of the fastest ways to damage a houseplant is placing the nursery pot inside a decorative pot that traps standing water.
Excess water sitting at the bottom of a decorative pot can lead to:
- Root rot
- Fungus gnats
- Yellowing leaves
- Blackened roots
- Sudden decline
Always check decorative pots after watering.
If water collects at the bottom, pour the excess out.
Why Your Houseplant Dries Out Faster In Some Homes
Every home environment is different.
Plants typically dry out faster in homes with:
- Large sunny windows
- Strong afternoon sun
- Low humidity
- Forced-air heating or AC
- Ceiling fans
- Fireplaces
- Warm upper-floor rooms
- Bright sunrooms
Plants usually dry out slower in:
- Cooler rooms
- Lower light conditions
- Humid homes
- Rooms with less airflow
SIMPLY TREES PRO TIP:
A plant may need frequent watering in summer but much less during winter when growth slows and sunlight decreases.
Overwatering vs Underwatering
Many symptoms overlap, which is why houseplant care can feel confusing.
Signs Of Overwatering
- Yellowing leaves
- Mushy stems
- Blackened roots
- Fungus gnats
- Soil staying wet for long periods
- Drooping with wet soil
- Sour or musty soil smell
- Soft brown spots
Signs Of Underwatering
- Crispy leaf edges
- Dry, curling leaves
- Drooping with dry soil
- Soil pulling away from the pot
- Lightweight pot
- Slow growth
- Dry or compacted rootball
Important:
A drooping plant does NOT automatically mean it needs water.
Both overwatering and underwatering can cause drooping.
Always check the soil first.
SIMPLY TREES PRO TIP:
If the soil is dry, the water is likely to drain quickly through the pot. This does not mean you're done watering.
Do Not Fertilize Immediately After Delivery or Repotting
Many houseplants experience mild stress after shipping, moving, or repotting.
Adding fertilizer too soon can make that stress worse.
Most Simply Trees houseplants already contain slow-release fertilizer blended into the soil, so additional fertilizer is usually unnecessary right away.
Wait at least 2–3 months before fertilizing newly delivered or freshly repotted plants.
SIMPLY TREES PRO TIP:
If your plant looks stressed after arrival, focus on proper light and watering first — not fertilizer.
Watering After Repotting
Fresh soil holds moisture longer than older soil.
When repotting:
- The plant may need water less frequently at first
- Oversized pots can stay wet too long
- Too much soil around a small rootball increases root rot risk
Choose a pot only slightly larger than the existing rootball whenever possible.
Best Light Conditions For Indoor Watering Success
Light directly affects watering frequency.
Plants in brighter light:
- Use more water
- Grow faster
- Dry out faster
Plants in lower light:
- Use less water
- Grow slower
- Stay wet longer
Low light + frequent watering is one of the most common causes of indoor plant decline.
Houseplants Most Commonly Overwatered
These plants prefer drying slightly between waterings:
- Snake Plant
- Jade Tree
- Olive Tree
- Dracaena
- Rubber Plant
Houseplants Most Commonly Underwatered
These plants often need more consistent moisture:
- Peace Lily
- Benjamina Ficus
- Bird of Paradise
- Monstera
- Kentia Palm
- Lady Palm
Benjamina Ficus Watering Guide
The Benjamina Ficus is one of the most beautiful indoor trees — and also one of the most sensitive to environmental change.
Leaf drop after shipping, moving, repotting, or changing light conditions is extremely common.
Many people panic when leaves fall and accidentally overwater the plant, which often worsens the issue.
Watering
Allow the upper portion of the soil to dry slightly before watering again. We've found that a consistently moist rootball, not soggy, is the best for the Benjamina.
Water deeply and thoroughly when needed.
An XL or XXL Benjamina with a substantial rootball needs significantly more water than the Medium or Large Benjamina.
Light
Benjamina Ficus prefers very bright indirect light and can even tolerate some direct morning or filtered afternoon sun indoors. A "bright room" that seems bright to us, is often not sunny enough for the Benjamina.
Low light often leads to:
- Excess leaf drop
- Weak growth
- Poor recovery after watering issues
Humidity
Average indoor humidity is usually acceptable, but very dry homes may increase leaf drop. Benjamina prefer a more humid home environment to thrive.
SIMPLY TREES PRO TIP:
Benjamina Ficus trees dislike sudden environmental changes. Avoid constantly moving the plant around the home.
Olive Tree Watering Guide (Indoors)
Olive trees are one of the most misunderstood indoor plants.
Many homes simply do not provide enough light for long-term indoor olive tree health.
Light Requirements
Indoor olive trees should ideally sit directly in front of:
- South-facing windows
- West-facing windows
- Extremely bright sunrooms
A “bright room” is often not enough.
Without sufficient sunlight, olive trees may experience:
- Leaf drop
- Weak growth
- Sparse foliage
- Soil staying wet too long
Watering
Allow the soil to dry noticeably between waterings.
Olive trees dislike constantly wet soil.
Always check the root zone before watering again.
Humidity
Olive trees generally prefer drier air compared to tropical houseplants.
Fiddle Leaf Fig Watering Guide
Fiddle Leaf Figs prefer consistency.
They dislike:
- Constantly soggy soil
- Extremely dry soil
- Sudden environmental changes
Water thoroughly once the upper few inches of soil begin drying out.
Bright light helps prevent overwatering problems.
Ficus Audrey Watering Guide
Ficus Audrey tends to be slightly more forgiving than Benjamina Ficus but still appreciates consistency.
Allow the top portion of soil to dry slightly between waterings.
Bright indirect light is ideal.
Dracaena Watering Guide
Dracaena varieties prefer slightly drier conditions than many tropical plants.
Overwatering is one of the most common problems.
Allow the soil to dry more between waterings compared to moisture-loving tropical plants.
Snake Plant Watering Guide
Snake Plants are highly drought tolerant.
They prefer drying thoroughly between waterings.
Overwatering is far more dangerous than underwatering for Snake Plants.
Lower light conditions mean even less frequent watering.
Monstera Watering Guide
Monsteras enjoy lightly moist soil but dislike staying soggy.
Bright indirect light helps the plant use water efficiently.
Water once the upper soil layer begins drying out.
Bird Of Paradise Watering Guide
Bird of Paradise plants prefer brighter light and more consistent moisture than drought-tolerant houseplants.
In lower light, reduce watering frequency significantly.
Kentia Palm Watering Guide
Kentia Palms prefer moderate, consistent moisture.
Avoid allowing the soil to stay overly wet for long periods.
Dry indoor air may cause browning leaf tips.
Lady Palm Watering Guide
Lady Palms appreciate evenly moist soil but should not remain waterlogged.
Moderate humidity is beneficial.
Peace Lily Watering Guide
Peace Lilies are known for visibly drooping when thirsty.
However, avoid allowing repeated severe wilting.
Peace Lilies generally prefer more moisture than drought-tolerant plants.
Money Tree Watering Guide
Money Trees prefer moderate watering and good drainage.
Allow part of the soil to dry between waterings.
Constant wet soil may lead to root problems.
Rubber Plant Watering Guide
Rubber Plants prefer drying slightly between waterings.
Bright light helps maintain healthy growth and stronger foliage.
Avoid constantly wet soil.
Jade Tree Watering Guide
Jade Trees store water in their thick leaves and prefer drying thoroughly between waterings.
Overwatering is extremely common.
Bright light and excellent drainage are essential.
Seasonal Watering Changes
Most houseplants need:
- More water in spring and summer
- Less water in fall and winter
Reduced winter sunlight usually means slower growth and lower water usage.
Continuing heavy summer watering during winter often causes problems.
Final Thoughts
The goal of watering houseplants is not to follow a perfect schedule.
It’s learning how to observe your plant, understand your home environment, and recognize when the rootball truly needs moisture.
Most indoor plant problems come from:
- Watering too often
- Poor drainage
- Low light
- Watering without checking the soil first
- Fertilizing stressed plants too soon
When in doubt:
Check the soil before watering.
Your houseplants will almost always respond better to observation and consistency than rigid schedules.
Helpful Plant Care Guides
Looking for more plant care tips? Explore our beginner-friendly Simply Trees guides designed to help your plants thrive indoors and outdoors.
→ Simply Trees Guide to Planting
Learn how to properly plant trees, shrubs, and plants for long-term success, including soil preparation, planting depth, watering after planting, and common mistakes to avoid.
→ Simply Trees Guide to Watering
Our complete guide to properly watering outdoor plants, trees, shrubs, and landscape plants throughout the seasons.
→ Simply Trees Guide to Fertilizing
Learn when, how, and when not to fertilize your plants, including beginner-friendly tips on avoiding fertilizer burn and helping plants establish healthy root systems.
