How to Care for Calathea Louisae ‘Thai Beauty’

Calathea Louisae ‘Thai Beauty’ a.k.a Calathea ‘Thai Beauty’

The Calathea ‘Thai Beauty’ is one of the many gorgeous Calathea plants. This one has striking green, lime green and cream coloured variegated leaves with purple on the underside. Like all other Calathea varieties, this one likes high humidity and bright indirect light.

Calathea ‘Thai Beauty’ is a newer, must have plant for your collection but be aware, Calathea plants are a little bit tougher to keep happy than some other houseplants.

Calathea ‘Thai Beauty’ Quick Overview

Full SizeLeaves reaching 6 inches long
LightBright Indirect
Care LevelMedium


In the correct living conditions, the leaves of a Calathea ‘Thai Beauty’ will reach up to 6 inches (15cm) in length.

Calathea ‘Thai Beauty’ Light Requirements

You should house your Calathea ‘Thai Beauty’ in a spot that will receive bright indirect light. In their natural habitat, Calathea plants live on the jungle floors and receive the light the shines through the tree leaves above. Giving your plant direct lighting will actually have a negative affect. Direct lighting will cause the leaves to burn and lose their vibrant colour. The foliage will also become splotchy or patchy.

Calathea ‘Thai Beauty’ can tolerate low to medium light conditions, however, new foliage may lose some variegation and be more of a green colour. Providing bright indirect light during the cooler months when the plants go into dormancy and sometimes die back, will assist to help maintain growth.


Like all Calathea plants, the Calathea ‘Thai Beauty’ likes to be positioned in a warm spot. These plants will grow best when housed in a spot that maintains a temperature of 65˚F-85˚F (18˚C-29˚C). If you can, try not to let the temperature drop below 65˚F (18˚C). Being kept outside of this temperature range can cause fungal infections and invite unwanted pests.


Calathea ‘Thai Beauty’ will thrive when kept in a high humidity environment, away from cold drafts. You should house your plant in a spot in your home where humidity is naturally higher than other spots like a bathroom. However, there are alternatives that you can use to increase the humidity in your home.

Some ways you can increase the humidity in your home are:

  • Humidifyer
  • Pebble tray
  • Grouping plants together
  • Misting
  • Terrarium

The foliage of Calathea plants can start getting brown tips and edges when kept in a spot where the humidity is too low. For more information on increasing the humidity in your home, click here.

Calathea ‘Thai Beauty’ Watering Requirements

Calathea ‘Thai Beauty’ like frequent watering because they like to be kept in moist (not soggy) soil. If you wait too long between watering, you will notice the leaves will start to go brown and crispy around the edges. When giving your plant a drink, ensure the water can freely drain away from the bottom of the pot as these plants don’t like to sit in water. You should also try and avoid getting water on the foliage as this can start fungal problems and browning leaves.

Not only do you need to be on top of their watering schedule, Calathea’s can be quite picky with the type of water you use. These plants tend to be quite sensitive to the minerals that are in most tap water and this can cause the foliage to yellow. To avoid these problems, you can use filtered water, rain water or tap water that has been left out overnight so the chlorine and minerals have been evaporated out.

Calathea ‘Thai Beauty’ Fertilizing requirements

You should fertilize your Calathea ‘Thai Beauty’ monthly during the growing period with a liquid fertilizer diluted to half strength. During the winter months, fertilizing isn’t required as growth will slow and plants may go into dormancy. Fertilizing your plants helps give the essential nutrients needed to promote new and healthy growth.

Soil Requirements

Since Calathea plants like the be kept moist, you should use a soil mix that will retain water while still being well draining. Calathea ‘Thai Beauty’ will grow best in a rich, peat based potting soil that is well draining. To achieve a mix that is well draining while still being able to hold moisture, you can use orchid bark potting mix with compost, perlite and peat mixed into it to help create better aeration. Aeration is important as it allows the roots to breath. Not having enough oxygen can cause the roots to start rotting.

When potting your plant, be sure to use a pot that has drainage holes to avoid soil becoming waterlogged and causing root-rot.

Diseases & Pests

The common pests you may encounter with your Calathea ‘Thai Beauty’ are Mealy Bugs, Spider Mites and Aphids. Some of the common diseases that you may encounter are root-rot and Fungal infections. For a wide range of information on combating a range of indoor plant pests and diseases click here.

Keeping your plants happy and healthy in the correct conditions can help to deter most pests and diseases. However, there are a few things you can do that will assist in preventing any pest infestations. The things you can try are:

  1. Checking new plants for pests or isolating new plants for up to a week.
  2. Check your plants every few days for pests.
  3. Trim off any dead or dying leaves.
  4. Wipe down leaves if you notice them getting dusty.
  5. Keeping your plants healthy. A healthy plant will be able to handle an infestation better than those that aren’t as happy. 
  6. Isolate any plants that have pests.

Following this will assist in keeping pests away as well as catch them early on before any severe infestations are able to start.


Good news for those with pets and children, Calathea ‘Thai Beauty’ are non-toxic.