Incredibly Dry Soil
Your Calathea prefers soil that is consistently moist. Be sure you’re not over or underwatering your plant. Keep a consistent watering schedule: water when the top 1”-2” of the soil is dry.
If you accidentally let your Calathea’s soil dry out completely, you may see leaves go limp, droop, and possibly start to brown and curl. If the soil is extremely dry all the way through the pot, a thorough soak is in order.
Here’s How to Soak Your Calathea:
- Place your plant in your sink or tub without the saucer. Fill your basin up with about 3-4″ of water. Make sure the water isn’t hot!
- Allow your plant to soak up water through the drainage hole in the bottom of the pot for at least 45 min.
- Feel the top of the soil after your plant has been soaking–has the water reached the top 2-3” of soil?
- If not all the soil feels saturated, water your Calathea slightly from the top of the soil to help speed up the saturation.
- When your plant’s soil is evenly damp, drain the sink/tub and allow the plant to rest while it drains thoroughly. Place the plant back on its saucer and back in its proper spot.
If the curling continues after you’ve regulated a watering schedule, another common reason your Calathea’s leaves are curling could be due to your tap water. Tap water contains salts, chlorine, minerals, and fluoride — all of which can build up in the soil of your plant causing the tips of the leaves to burn, turn brown, and curl up.
One way you can remedy this is to use a water filtration system. If you do not have a filtration system available, leaving your water in an open container or sink overnight before using can help relieve some of the chlorine.
Make sure your plant is not in a drafty area or in the path of heating and cooling vents. Leaves will curl if the plant is cold, or excessively dry from constant warm airflow.
Not Enough Humidity
Your Calathea is a tropical plant, so it will thrive in more humid environments. Increase the humidity around your plant by misting the leaves on a regular basis, using a pebble tray, or moving a humidifier nearby.