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calathea

How to Grow and Care for Calathea

Learn how to grow and care for calathea with practical guidance on indirect light, humidity, watering, soil, repotting, propagation, pests, seasonal changes, and pet safety.

By Bettesworth Construction Team 11 min read
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Calatheas thrive when their environment is stable. Provide bright indirect light, warmth, humid air, and potting mix that stays evenly moist without becoming waterlogged. Check the plant and soil regularly instead of relying on a fixed watering calendar.

Calatheas grow best when their environment is steady: give them bright, indirect light, warmth, humid air, and soil that stays lightly and evenly moist without becoming waterlogged. The most reliable routine is to check the plant and potting mix regularly rather than watering on a fixed weekly schedule.

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Calathea is a broad group of tropical foliage plants valued for patterned leaves and, in some types, leaves that move noticeably between day and night. They are not usually difficult because they need constant attention; they are difficult because they react quickly to dry air, harsh light, cold drafts, mineral-heavy water, and inconsistent watering.

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Calathea care at a glance

Care factor What to provide Common mistake
Light Bright, filtered or indirect light Putting the leaves in strong direct summer sun
Temperature Warm, stable indoor conditions away from drafts and heat sources Allowing abrupt temperature changes
Humidity A humid room, ideally checked with a hygrometer Relying on occasional misting alone
Water Evenly moist but well-drained potting mix Leaving the pot standing in water
Water quality Tap water if suitable; filtered or distilled water if minerals cause damage Assuming every household must use distilled water
Soil and pot Airy, moisture-retentive, peat-free mix in a pot with drainage Using a container with no drainage opening
Feeding Suitable houseplant fertilizer during active growth, following its label Continuing a heavy feeding routine in low-light winter conditions

Choosing a healthy calathea

Start with the healthiest plant available. Choose a calathea with reasonably upright, firm growth and leaves that are largely free from extensive spotting, wilting, or insect damage. A few cosmetic marks do not necessarily mean the plant is doomed, but widespread damage can make it harder to distinguish acclimation from an active problem.

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Before bringing it home, inspect both sides of the leaves, the stems, the soil surface, and the outside and underside of the container. Look for webbing, cottony insects, clusters of small insects, sticky residue, flying insects, or unusually wet soil. Keep a new plant separate from the rest of your collection for about one to two weeks while you monitor it. This short quarantine can prevent an unnoticed pest from spreading through several plants.

If you are buying your first plant, a calathea plant from a reputable seller is the simplest starting point. Availability, seller quality, plant size, and shipping conditions vary, so inspect the plant when it arrives and give it time to adjust before making major changes.

Give calathea bright, indirect light

Place a calathea where it receives abundant ambient light without harsh rays hitting the leaves for long periods. An east-facing window, a bright position behind a sheer curtain, frosted glass, or a spot set back from a stronger window can work well.

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Strong direct summer sun may scorch the foliage, causing bleached patches, faded patterns, or crispy brown areas. Bright indirect light does not mean a dark corner: if growth is weak, new leaves are unusually small, or the plant leans toward the window, the room may be too dim.

In a low-light room, use a full-spectrum LED grow light as supplemental lighting. A specialized horticultural fixture is not necessarily required for basic supplementation. During winter, approximately 12 to 14 hours of supplemental light may help a plant that is stretching or struggling to receive enough daylight. Keep the light at a sensible distance according to the fixture’s instructions rather than placing a hot lamp directly over the foliage.

Keep the temperature warm and stable

Calatheas prefer warm indoor conditions and dislike abrupt changes. Guidance varies by source: the Royal Horticultural Society gives approximately 61–70°F, while University of Minnesota Extension gives 70–85°F in its calathea guidance. Rather than treating one number as universal, aim for a comfortably warm, stable room—roughly the upper 60s to low 80s—and avoid sudden shifts.

Keep the plant away from:

  • cold windows or exterior doors in winter;
  • heating vents, radiators, and fireplaces;
  • strong air-conditioning drafts;
  • hot, drying airflow; and
  • rapid moves from stable indoor conditions into intense outdoor sun.

A calathea can struggle after a change of location even when the new spot seems attractive. Move it gradually when possible, and give it time to acclimate before diagnosing every dropped or curled leaf as a watering failure.

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Humidity: improve the room, not just the leaves

Humid air helps calatheas replace water lost through their leaves. Dry air can contribute to curling, wilting, and brown margins even when the roots are receiving water correctly.

Useful ways to raise or stabilize humidity include:

  • placing the plant in a naturally humid bathroom with suitable light;
  • grouping several plants together;
  • setting the pot near, but not in, a pebble or gravel tray containing water below the pot’s base;
  • using a room humidifier when heating or air conditioning makes the room dry; and
  • checking the room with a digital hygrometer instead of guessing.

Misting may temporarily increase moisture immediately around the leaves, but it is not a dependable substitute for improving room humidity. Do not place the plant directly beside a radiator or in a strong draft in an attempt to compensate for dry air. Good airflow is useful; forceful, drying airflow is not.

Water by checking the potting mix

During active growth, keep the potting mix evenly moist, but never saturated. Check the mix and the plant’s recent conditions before watering. A plant in bright, warm conditions may use water faster than one in a cool, dim room, so a universal weekly schedule will eventually lead to either drought stress or overwatering.

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  1. Feel the surface and upper layer of the potting mix.
  2. Consider whether the plant is actively growing or using water slowly in winter.
  3. Water thoroughly when the mix has begun to dry but is not bone-dry.
  4. Let water run through the drainage opening.
  5. Empty the saucer or decorative cover pot so the roots do not sit in standing water.

Reduce watering as light levels and growth slow in winter. Do not let the plant remain wet simply because it was watered on the usual summer schedule. A constantly wet mix deprives roots of air, increases the risk of root problems, and can encourage fungus gnats.

Should you use filtered or distilled water?

It depends on your household water. Some calatheas develop recurring mineral spotting, crispy margins, or leaf damage when watered with mineral-heavy tap water. In that situation, try filtered water; distilled water is another option. Filtered or distilled water is not automatically mandatory for every calathea, because local water chemistry differs.

Do not assume that leaving tap water out overnight removes every potentially troublesome substance. If symptoms persist, compare the plant’s response after switching water while also checking light, humidity, drainage, and pests.

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Use an airy, well-draining potting mix

Calathea soil should hold enough moisture for the plant while allowing excess water and air to move through the root zone. A peat-free, well-draining indoor houseplant medium is a suitable starting point. The exact recipe matters less than the result: the mix should not become a stagnant, waterlogged mass after routine watering.

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Always use a container with a drainage opening. A decorative cachepot can still be used, but remove the growing pot or empty the cachepot after watering. A pot with no way for excess water to escape is one of the fastest routes to root stress.

When and how to repot

Repot a calathea every few years or when it has clearly outgrown its container. Signs include roots circling densely through the mix, roots emerging from the drainage opening, water running straight through because the root ball is crowded, or growth slowing despite appropriate light and care.

Use a clean container, fresh indoor potting soil, and a pot only modestly larger than the current one. A dramatically oversized container can hold a large volume of wet mix around a relatively small root system, allowing it to stay damp too long.

  1. Water lightly if the root ball is extremely dry, then allow excess water to drain.
  2. Slide the plant from its container without pulling hard on the leaves.
  3. Inspect the roots and remove clearly dead or mushy material with clean tools.
  4. Place the plant at the same depth in fresh mix.
  5. Water enough to settle the mix, then drain thoroughly.
  6. Return it to warm, indirect light and avoid a sudden change in conditions.

Propagate calathea by division

Division is the most dependable general propagation method. Spring is a good time because increasing light and active growth support recovery.

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  1. Remove the established clump from its pot.
  2. Separate the plant into sections carefully, following natural divisions in the clump.
  3. Make sure every division retains roots and several leaves.
  4. Pot each division into a suitable draining container with fresh mix.
  5. Keep the divisions warm, humid, and evenly moist while they recover.

Some branching relatives can also be propagated from stem cuttings, but do not assume that every calathea cultivar will root readily from a leaf or stem cutting. Division is the broadly applicable approach.

Feeding and seasonal care

When the plant is actively growing in brighter, warmer conditions, feed with a suitable houseplant fertilizer according to the product label. Avoid treating fertilizer as a remedy for poor light, dry air, root damage, or pests. Those underlying problems need correction first.

In winter, lower light and slower growth usually mean slower water use. Check the mix more carefully and reduce watering frequency as needed. If the plant stretches or becomes weak in a dim room, supplemental lighting may be more useful than adding fertilizer.

Pruning and leaf cleanup

Routine hard pruning is not generally necessary. Remove fully brown or faded leaves and dead stems with clean scissors, cutting near the base without damaging healthy growth. A partly damaged leaf will not regain its lost tissue, but leaving it temporarily can allow the plant to use the remaining healthy portion.

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Wipe away dead material from the soil surface and clean the surrounding area. This improves inspection and removes places where pests may hide.

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Diagnosing brown edges, curling, and wilting

Brown leaf edges are a symptom, not a diagnosis. Low humidity, mineral accumulation, direct sun, inconsistent watering, root stress, and pests can all contribute. Check the likely causes in a logical order rather than changing everything at once.

  1. Check the light. Move the plant away from harsh direct rays, but do not place it in deep shade.
  2. Feel the potting mix. Determine whether it is dry, evenly moist, or persistently wet.
  3. Check drainage. Confirm that the container has an opening and that water is not trapped in a saucer or cachepot.
  4. Assess humidity and drafts. Look for heating, air-conditioning, or other drying airflow.
  5. Consider water quality. If mineral marks or crispy margins recur, try filtered water for a period of time.
  6. Inspect for pests. Look closely beneath leaves, along stems, around the pot rim, and across the soil surface.
  7. Inspect roots if the problem continues. Persistent wetness, foul-smelling mix, or a collapsing plant may indicate root stress.

Correct one or two clear environmental problems and allow time for new growth to show whether the change helped. Existing brown tissue will remain brown; judge recovery by the condition of new leaves and the plant’s overall firmness.

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Pests: inspect early and treat the cause

Calatheas may attract fungus gnats, aphids, mealybugs, mites, and whiteflies. Inspect the undersides of leaves and the junctions where leaves meet stems. Fine webbing, cottony deposits, clusters of insects, stippling, distorted growth, or flying insects are reasons to investigate more closely.

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Quarantine affected plants and separate new arrivals during their initial monitoring period. Wash foliage where appropriate, remove heavily infested material, and use an indoor-plant treatment only after identifying the pest. Insecticidal soap, neem or other plant oils, pyrethrins, and other options may be listed for indoor plants, but product labels, plant sensitivity, ventilation, children, pets, and local regulations all matter. Never improvise a treatment concentration.

Fungus gnats

Fungus gnats are often associated with persistently wet or organic-rich potting media. Yellow sticky cards are useful for detecting and capturing adult gnats, but they do not solve the larval stage in the soil by themselves. Allowing the mix to dry appropriately between waterings, improving drainage, and avoiding standing water are part of the control strategy.

Are calatheas safe for pets?

The ASPCA lists Calathea species as non-toxic to dogs, cats, and horses. That is reassuring for pet households, but it does not mean pets should eat the plant. The ASPCA notes that consuming plant material can still cause vomiting or gastrointestinal upset. Contact a veterinarian or appropriate animal poison service if a pet consumes a significant amount or develops symptoms.

A simple weekly inspection routine

Rather than following a rigid watering calendar, use a short inspection routine:

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  • Look at the newest leaves and check for curling, spotting, or distorted growth.
  • Inspect leaf undersides and stems for pests.
  • Feel the potting mix before deciding whether to water.
  • Check that the saucer or cachepot is not holding water.
  • Look for drafts, harsh sun, or a recently changed position.
  • Remove dead leaves and keep the soil surface clean.

That stable-care system—filtered light, warmth, humidity, appropriate moisture, drainage, and frequent observation—solves more calathea problems than any single product or calendar rule.

Frequently Asked Questions

What is the best way to care for a calathea?

Give it bright, indirect light; warm, stable conditions; humid air; and potting mix that stays evenly moist but drains freely. Check the soil before watering instead of following a fixed weekly schedule.

Why are my calathea leaves turning brown?

Brown edges can result from low humidity, mineral-heavy water, direct sun, inconsistent watering, root stress, or pests. Check light, soil moisture, drainage, humidity, water quality, and the leaves for insects before choosing a remedy.

How often should I water a calathea?

Water when the mix has begun to dry but is not completely dry, then let excess water drain away. Frequency changes with light, temperature, pot size, and season, so there is no reliable universal weekly schedule.

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Does calathea need direct sunlight?

Calatheas generally prefer bright filtered light rather than strong direct sun. Direct summer rays can scorch or fade the foliage, while very dim light can cause weak, leaning growth.

Are calatheas safe for cats and dogs?

Yes. The ASPCA lists Calathea species as non-toxic to dogs, cats, and horses. Pets should still not be encouraged to eat it because plant material may cause gastrointestinal upset.

The Bottom Line

The key to a healthy calathea is consistency: bright indirect light, warm and draft-free conditions, humid air, evenly moist but well-drained soil, and water adjusted to the season. When leaves brown or curl, inspect the whole environment before assuming the plant simply needs more water.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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