Know what Wabi Kusa is: an accessible Japanese technique of aquatic landscaping to decorate projects with simplicity and living nature
Submitted at Mar 2, 2026, 9:40 AM
(Buceplant/Divulgação)
The Wabi Kusa is a technique of aquatic landscaping that unites nature, contemplation, and simplicity. Created in Japan and inspired by the principles of wabi-sabi — a philosophy that values imperfection, transience, and natural beauty —, Wabi Kusa emerged as a poetic way to cultivate aquatic and palustrine plants (adapted to waterlogged soils) outside of the traditional aquarium. Instead of tanks full of water, the composition is made from small "islands" of vegetation, usually shaped into substrate balls, which can be kept in glass containers, shallow trays, or open terrariums.
(Chicago Aquatic Plant Society/Divulgação)
More than a decorative arrangement, Wabi Kusa proposes a more sensitive relationship with time, the growth of plants, and natural cycles. Therefore, it has gained space among aquarists as well as among landscaping enthusiasts, of biophilic design and contemporary decoration.
The Wabi Kusa consists of a three-dimensional plant composition, usually made from a fertile substrate shaped into a ball or mound, where aquatic, semi-aquatic, or palustrine plants are fixed. Unlike classic aquascaping, it does not need to be fully submerged. The plants grow in a humid projects, with roots constantly hydrated, but with leaves exposed to the air.
(PlantedTank/reddit/Divulgação)
This method allows observing distinct phases of the plants, such as the emergence of aerial leaves and flowers, something not always possible inside aquariums. The result is a living, organic, and mutable piece that transforms over the weeks and months, reinforcing the concept of impermanence so present in Japanese aesthetics.
The technique has deep roots in Japanese culture, especially in the appreciation of the simple and natural. The term "wabi" refers to rustic simplicity and tranquility, while "kusa" means plant or grass. Together, they express the idea of a contained, delicate, and not overly controlled nature.
(Rainforest Concepts/Divulgação)
In landscaping, this translates into compositions that do not seek perfect symmetry or artificial exuberance. On the contrary: small flaws, irregular growths, and differences in texture are part of the aesthetic. Wabi Kusa invites silent observation, functioning almost like a meditative object within the home.
To create a basic Wabi Kusa, very few materials are required, contributing to its popularity.
(Aquaden/Divulgação)
This is the base of the composition and must be rich in nutrients to sustain the healthy growth of plants over time. Usually, a specific mixture for aquascaping or substrates specific for palustrine plants are used.
Choose species that adapt well to emersed cultivation, with small or medium leaves and balanced growth, ensuring visual harmony to the composition.
Frequently used for finishing, they help maintain substrate moisture and create texture, in addition to reinforcing the characteristic organic aspect of Wabi Kusa.
It serves to temporarily fix the plants and mosses to the substrate until they root naturally.
It can be a transparent pot, shallow tray, or bowl, allowing for visibility of the composition and enhancing the decorative aspect.
Essential to keep the substrate moist and avoid damage to the plants; water can be filtered or left to stand before use.
Indirect natural light is usually sufficient, but specific plant lights can be used in indoor projects with little light incidence.
Facilitates daily maintenance, keeping leaves and substrate constantly hydrated.
The choice of plants is one of the most important points of Wabi Kusa. The most suitable are aquatic species that adapt well to emersed growth, that is, out of water. Palustrine plants also work very well, as they like moist soil and high humidity in the air.
(Aquaa3/Divulgação)
Mosses are widely used to create texture and finish, as well as helping to retain moisture. Plants with small leaves and controlled growth tend to offer a more visually balanced result. Ideally, combine different heights, colors, and shapes of leaves, creating depth and movement without overwhelming the composition.
Despite its delicate appearance, Wabi Kusa is relatively easy to maintain. The main attention should be given to moisture: the substrate should never dry out completely. Daily misting with water or keeping a small level of water in the container is essential for the health of the plants.
(Chicago Aquatic Plant Society/Divulgação)
Lighting also directly influences development. Well-lit locations, but without intense direct sunlight, are usually ideal. If in a project with little natural light, the use of artificial light designed for plants may be necessary. Over time, light pruning helps maintain the desired shape and encourages healthy growth.
(Buceplant/Divulgação)
Observing the Wabi Kusa is part of the process. Changes in coloration, uneven growth, or the emergence of flowers indicate how the microecosystem is reacting. This constant monitoring is what makes the technique so engaging and aligned with a more sensitive and conscious landscaping.
CASACOR Publisher is an exclusive content creator agent, developed by the CASACOR Technology team based on the knowledge base of casacor.com.br. This text was edited by Yeska Coelho.
