Why is my croton dropping leaves, and is it too cold or too dry?

Croton leaf drop most likely comes from cold air, dry air, uneven watering or a change in light. Extension sources list all of these. Check for drafts and cold first, then the soil moisture, then the light. A few older inner leaves dropping on an otherwise healthy plant can be normal.

Updated 27 October 2026

What does your croton’s leaf drop point to?

Match what you see to the rows below. Then change one thing at a time. Sources name several causes, so one sign rarely settles it.

Croton leaf drop: signs, checks and next steps
What you notice	What to check	A useful next step
A few older inner leaves drop	Whether the rest of the plant looks very healthy.	Iowa State University Extension and Outreach says not to worry about it.
Leaves drop after a cold night, a draft or a cold trip home	Air near doors, vents and windows, and whether temperatures stayed below 50 °F.	Move the plant to steadier warmth.
Leaves drop and the tips or edges turn brown	Dry air and dry soil.	Raise humidity. Water when the top of the soil is no longer moist.
Leaves drop and the soil stays wet	Water in the saucer.	Empty the saucer. Water only when the top of the soil has dried.
Leaves drop after a move to a darker spot	How fast the light changed.	Move the plant to new light levels slowly, over several weeks.

Is your croton too cold or sitting in a draft?

Cold can be the cause. The University of Wisconsin-Madison Extension says croton often suffers leaf drop if temperatures stay below 50 °F. The Royal Horticultural Society says crotons need constant warmth all year, around 65–95°F. It says they should not go below 55°F.

Drafts matter too. The Royal Horticultural Society says fluctuating temperatures and cold drafts can cause croton leaves to drop. Nebraska Extension says croton prefers warm night temperatures. It says plants grown too cold for growth have translucent leaves that yellow and fall off suddenly.

Check the spot. Iowa State University Extension and Outreach says to avoid drafts from doors, heat vents or windows.
Skip the window gap. Iowa State says not to trap plants between the window and a curtain. Temperatures there change a lot from day to night.
Bring it in early. If your croton spends summer outside, the University of Wisconsin-Madison Extension says to move it indoors in fall before temperatures fall below 50 °F. Colder temperatures can cause leaf loss.
Protect it in transit. Iowa State says to box or bag tropical indoor plants in below-freezing air. Even brief exposure can damage them and lead to leaf drop.

Is dry air or uneven watering behind the leaf drop?

Either can be. The University of Wisconsin-Madison Extension says croton plants drop leaves if they are kept too wet or too dry for extended periods. The Royal Horticultural Society says crotons tend to drop their leaves in dry air or dry compost.

The University of Wisconsin-Madison Extension says to water croton only when the top half-inch to an inch of soil dries out. It says to water less in winter. Nebraska Extension suggests a finger test: push a finger 1 to 2 inches into the potting medium. Our guide on telling when a plant needs water has more.

Clemson Cooperative Extension says not to let houseplants stand in a saucer full of water. UNH Cooperative Extension says water pooling among stones at the bottom of a pot can keep roots much wetter than they should be. It says this can encourage root rot, and that pots should have a drainage hole.

UNH Cooperative Extension says brown tips and edges on leaves show that humidity is too low. It recommends aiming for around 40 to 50 percent humidity. Iowa State says a humidifier, a pebble tray, a terrarium or grouping plants can raise humidity. The Royal Horticultural Society suggests standing the pot in a tray of damp pebbles, away from direct heat.

If the soil looks too wet, read how overwatering and underwatering differ.

Can a change in light make your croton drop leaves?

Yes. Iowa State University Extension and Outreach says light that is too high or too low, or a sudden change in light, will cause leaf drop. It also says leaf drop can occur when plants are quickly moved from bright to darker spots.

The Royal Horticultural Society says crotons need bright but indirect light in summer to grow well. In insufficient light, the leaves may lose their vibrant colors or drop. It says strong summer sunshine can scorch the foliage, so keep plants out of it.

When you change the spot, Iowa State says to move plants to new light levels slowly, over several weeks. Our guide on how much light a houseplant needs can help you pick a spot.

When should you check your croton’s roots?

Check the roots when your croton wilts as well as drops leaves. The UC Statewide IPM Program says to inspect roots whenever wilting occurs. It says wilting may come from underwatering, excess light or root decay.

The UC Statewide IPM Program says healthy roots should be white. It says off-color roots, especially at the tips, often point to root rot. Clemson Cooperative Extension says infected roots are brown to black and may be soft. Our page on root rot covers what to do next.

Clemson Cooperative Extension says white to gray crusty deposits on the soil or pot rim signal salt buildup. It says fertilizer and minerals from hard water can cause root damage and wilting, and it advises repotting in fresh soil. Read whether to repot a struggling plant before you decide.

The UC Statewide IPM Program says preventing root rot takes good soil aeration and drainage plus the right watering frequency. It also says that once a problem is found, it is sometimes not practical to restore a plant’s health.

Plant Doctor, an AI plant diagnosis app for iPhone, uses three photos of the plant to point to the most likely cause, with the evidence behind it.

Croton questions

How long does leaf drop last after I bring a croton home?

Nebraska Extension says houseplants may lose some foliage within a week or two of purchase. Homes usually have lower light and humidity than where the plant was grown. Clemson Cooperative Extension says leaf drop after a big change in environment should only last about three weeks. If it goes on longer, look at the other causes above.

Can pests make a croton drop leaves?

Sometimes. Clemson Cooperative Extension says insects and diseases occasionally cause leaf drop. The UC Statewide IPM Program says leaves infested with thrips often yellow and drop. It says fungus gnat infestations can bring foliage loss. UNH Cooperative Extension says spraying foliage with a heavy stream of water every few days can knock spider mites off plants. See our houseplant pest guides to identify what you have.

Should I fertilize a croton that keeps dropping leaves?

Not as a first step. Iowa State University Extension and Outreach says under-fertilized plants often yellow and drop leaves. Nebraska Extension says excess fertilizer or salts can cause leaf drop when light is low. The University of Wisconsin-Madison Extension says to fertilize croton once or twice during the growing season, or more often for faster growth. Check temperature, water and light first.

Sources and further reading

Care guidance checked against the sources below. Plant Doctor’s app examples are separate from these references; the institutions do not endorse the app.

Drafted with AI from the sources below; each plant-specific fact checked automatically against its source on 26 October 2026.

This guide offers general plant-care information. A photo cannot confirm every cause; a local nursery or extension service can help with severe or unclear cases.