How to grow indoor bonsai trees in water?

Indoor Bonsai Tree Care

Welcome to the world of indoor bonsai trees! These miniature trees bring nature's beauty into your home, creating a serene and tranquil atmosphere. Growing bonsai trees indoors can be a rewarding and enjoyable experience. In this article, we will explore how to grow indoor bonsai trees in water, a unique and alternative method for cultivating these beautiful plants.

Indoor Bonsai Tree Species

Before diving into the specifics of growing bonsai trees in water, it's essential to understand the suitable species for indoor cultivation. While many bonsai tree species can thrive indoors, some are better suited than others. Here are a few popular choices:

  • Ficus Retusa (Chinese Banyan)
  • Schefflera Arboricola (Hawaiian Umbrella Tree)
  • Podocarpus Macrophyllus (Buddhist Pine)
  • Crassula Ovata (Jade Tree)
  • Carmona Retusa (Fukien Tea)
  • Bonsai Tree Water Requirements

Water is vital for the health and survival of any plant, and bonsai trees are no exception. Understanding the water requirements of indoor bonsai trees is crucial to their overall well-being. Here are a few key considerations:

  • Do not overwater: While water is essential, overwatering can lead to root rot and other diseases. Ensure the soil is slightly moist, but never soggy.
  • Check the soil moisture: Stick your finger into the soil up to your first knuckle. If the soil feels dry at that depth, it's time to water the bonsai tree.
  • Avoid underwatering: On the other hand, do not let the soil completely dry out. Bonsai trees need a consistent level of moisture to thrive.
  • Use filtered or distilled water: Tap water may contain chemicals or minerals that can harm the bonsai tree over time. Using filtered or distilled water helps to avoid these potential issues.
  • Observe humidity levels: Most indoor bonsai trees appreciate a slightly humid environment. Consider placing a humidity tray filled with water and pebbles near the bonsai tree to create a humid microclimate.

Hydroponics for Bonsai Trees

Hydroponics, the practice of growing plants in water rather than soil, is gaining popularity among bonsai enthusiasts. This method offers several advantages, including better control over nutrient intake and faster growth. If you are interested in exploring hydroponics for your indoor bonsai trees, here are a few key considerations:

  • Selecting a hydroponic system: There are various hydroponic systems available, such as deep water culture, nutrient film technique, and aeroponics. Research each system and choose the one that best suits your needs.
  • Choosing appropriate nutrients: Bonsai trees have specific nutrient requirements. Look for hydroponic nutrient formulated solutions for bonsai trees and follow the recommended dosage instructions.
  • Monitoring pH levels: Maintaining the correct pH level is crucial for the health of your bonsai tree. Invest in a pH testing kit and adjust the pH as needed to ensure optimal nutrient absorption.
  • Providing adequate hydro lighting: Bonsai trees grownponically still require sufficient light for photosynthesis. Consider using grow lights to provide the necessary light spectrum for healthy growth.
  • Water temperature and aeration: Pay attention to the water temperature and ensure proper aeration to prevent stagnant water conditions, which can lead to root rot.

Growing Bonsai Trees Indoors

Growing bonsai trees indoors requires attention to several factors, including light, temperature, and air circulation. Here are a few tips to help you create an ideal environment for your indoor bonsai trees:

  • Light: Most bonsai trees prefer bright, indirect light. Place your bonsai tree near a window where it can receive plenty of natural light throughout the day. If natural light is limited, consider supplementing with artificial grow lights.
  • Temperature: Bonsai trees thrive in moderate temperatures. Ideally, maintain temperatures between 60°F (15°C) and 75°F (24°C). Avoid placing your bonsai tree near drafty windows or heating vents.
  • Air Circulation: Good air circulation helps prevent the development of fungal diseases and promotes healthy growth. Ensure there is adequate space around your bonsai tree and avoid overcrowding it with other plants or objects.
  • Pruning and Shaping: Regular pruning and shaping are essential for maintaining the desired form and size of your bonsai tree. Research the specific pruning requirements for your bonsai tree species and follow proper techniques.
  • Fertilization: Bonsai trees require regular fertilization to replenish essential nutrients. Use a balanced bonsai tree fertilizer and follow the recommended dosage instructions.

Growing Bonsai in Water

Now let's delve into the unique method of growing bonsai trees in water. While most bonsai trees are traditionally grown in soil, growing them hydroponically can offer some advantages and a visually striking display. Here's how to grow bonsai trees in water:

  • Selecting a suitable bonsai tree:Selecting a suitable bonsai tree: Not all bonsai tree species are well-suited for growing in water. Choose a species that has a natural tendency to tolerate wet conditions, such as the Ficus Retusa or Schefflera Arboricola.
  • Preparing the container:Preparing the container: Select a shallow and wide container that can hold enough water to submerge the roots of the bonsai tree. Ensure the container has proper drainage holes to prevent waterlogging.
  • Preparing the water:Preparing the water: Filtered or distilled water is preferred for growing bonsai trees in water. Fill the container with water, leaving enough space for the roots to be submerged without touching the bottom.
  • Placing the bonsai tree: Gently lower the bonsai tree into the water, ensuring the roots are fully submerged. Use rocks or decorative pebbles to support the tree and maintain its position.
  • Maintaining water levels: Regularly monitor the water levels and top up as needed to ensure the roots remain submerged. Evaporation and absorption may require periodic additions of water.
  • Adjusting nutrients: Although the water itself doesn't provide significant nutrients, you can add a diluted hydroponic nutrient solution to provide essential elements for your bonsai tree's growth.
  • Monitoring root health: Over time, keep an eye on the root health. Ensure there are no signs of root rot or other diseases. If necessary, trim any damaged or decaying roots.
  • Pruning and shaping: Just like traditional bonsai trees, regularly prune and shape your bonsai tree in water to maintain its desired form and size.

Watering Indoor Bonsai Trees

Proper watering is vital for the health and well-being of indoor bonsai trees. Here are a few additional tips to ensure you water your bonsai tree effectively:

  • Water thoroughly: When watering, make sure the water reaches all parts of the root system. This helps prevent uneven moisture distribution and encourages healthy root growth.
  • Allow for drainage: Ensure that the container or bonsai pot has proper drainage holes to allow excess water to escape. Stagnant water can lead to root rot and other issues.
  • Watering frequency: The frequency of watering depends on several factors, including the species of bonsai tree, the pot size, and environmental conditions. Check the moisture level of the soil regularly and adjust your watering schedule accordingly.
  • Water temperature: Using lukewarm water is generally recommended for watering indoor bonsai trees. Extreme temperature differences can shock the roots and cause stress to the plant.
  • Consider humidity trays: As mentioned earlier, placing a humidity tray filled with water and pebbles near your bonsai tree can create a humid microclimate, especially in dryer environments.

Tips for Watering Indoor Plants

While growing bonsai trees in water may differ slightly from traditional plant care methods, many general tips for watering indoor plants still apply. Here are a few additional pointers to keep in mind:

  • Observe your plants: Each bonsai tree is unique, so closely observe how your plant responds to watering. Adjust your watering routine based on its specific requirements.
  • Avoid underwatering or overwatering: Finding the right balance is key. Too little water deprives the plant, while excessive water can lead to root issues. Learn to read the signs of both overwatering and underwatering.
  • Use your fingertips: Instead of relying solely on a watering schedule, use your fingertips to check the moisture level of the soil. This hands-on approach allows you to have a better understanding of your bonsai tree's needs.
  • Consider the pot material: The material of the bonsai pot can affect water retention. Porous materials, like unglazed clay pots, allow moisture to evaporate faster compared to plastic pots. Adjust your watering frequency Accordingly.
  • Invest in a moisture meter: If you find it challenging to determine the soil moisture level accurately, consider using a moisture meter. This handy tool takes the guesswork out of watering.
  • Learn from experience: Growing bonsai trees is a continuous learning process. As you gain experience, you will become more attuned to your bonsai tree's water requirements and develop your watering techniques.


With these guidelines, you are well on your way to successfully growing indoor bonsai trees in water. Remember, patience and attentive care are essential for the long-term health and beauty of your bonsai trees. Enjoy the journey and the unique art form of bonsai cultivation!