Propagation
Division of the clump during spring and maintain a humid warm environment. 

Botanic information
Leaf: The leaves are oblong to broad elliptical with a petiole up to 300mm (1ft) long. The upper surface has a velvety texture with a yellowish mid-rib and veins that contrast with the very dark green blade. The underside is purplish-red and the texture is soft.

Flower: The rounded spike is up to 100mm (4in) long consisting of brown sheathed bracts from which the tiny 3-lipped white-violet tubulate flowers appear in the openings. The inflorescence is appears amongst the leaves on a tall scape during spring.

Fruit: The tiny fruit is a 3-celled capsule and the small seeds are viable but the plant is commonly reproduced vegetatively. The flowering and fruiting period may vary in tropical regions.

Calathea species.
These plants require an average temperature of 10ºC (50ºF) to 15.5ºC (60ºF) avoiding sudden variations in temperature. They prefer a humid environment and respond to regular misting of the leaves. 

When grown indoor place in a position with bright indirect light as the colours in the leaves fades in direct light. 
Keep the soil moist not wet and use tepid soft water, reducing during the winter period.

If the plant forms brown and dry stunted growth it normally is the result of the air being too dry.
Excessive moist soils will cause rot at the base of the plant.