How to Grow Kratky Hydroponic Tomatoes

Summary

In this video, the host demonstrates how to grow hydroponic tomatoes using the Kratky method, a passive, low-maintenance hydroponic technique. The video covers the setup of a simple, cost-effective system that doesn't require electricity or specialized equipment. The host explains the importance of using suitable containers, creating a sturdy lid, and experimenting with different methods for root spreading. The plants are nourished by a pre-mixed nutrient solution, and the growth process is documented, showcasing impressive results. While there are a few challenges like calcium deficiencies and rodent pests, the host highlights the effectiveness of the Kratky method and offers solutions for improving future systems.

Takeaways

• 😀 Cracky hydroponic gardening is a simple, low-maintenance method for growing plants without the need for electricity or complex systems.
• 😀 The Kratky method works well for growing a variety of plants, not just lettuce, in a container with nutrient solutions.
• 😀 Recycled plastic containers (such as 65-liter storage tubs) can be effectively used for creating a Kratky hydroponic system.
• 😀 To create a lid for the hydroponic system, a sturdy wooden ply can be used and holes are made to allow plant roots to spread.
• 😀 The Kratky system can be applied outdoors and doesn't necessarily require LED grow lights, making it an accessible option for home gardeners.
• 😀 The root system can spread across the container's space, allowing plants to utilize the full nutrient solution, enhancing plant growth.
• 😀 Two experiments were conducted comparing 42mm hole lids and 150mm net pots to see the differences in root growth and plant productivity.
• 😀 The cracky technique works by providing a dual root zone where roots above the nutrient solution extract oxygen, while the roots below draw nutrients.
• 😀 Nutrient levels in the Kratky system drop as plants absorb them, but roots continue to chase the nutrients down, leading to healthy growth.
• 😀 One issue faced was a calcium deficiency in the system, causing blossom end rot in tomatoes, which could be fixed by adding extra calcium.
• 😀 A rodent problem was noted as pests caused damage to tomatoes, highlighting the importance of pest control for optimal results in the greenhouse.

Q & A

What is the Kratky method of hydroponics and how does it work?

The Kratky method is a passive hydroponic system where plants grow without the need for electricity or pumps. The roots of the plant are submerged in nutrient-rich water, while the top portion of the roots is exposed to air. As the water level drops, the plant roots continue to chase the nutrients, growing downwards.

What is the goal of using recycled containers in this hydroponic setup?

The goal of using recycled containers is to keep the setup affordable and environmentally friendly. The containers provide a solid base for the plants and are large enough to accommodate the growing roots, making them a practical choice for the Kratky method.

Why did the creator choose 65-liter containers for the hydroponic setup?

The creator chose 65-liter containers because they were the largest available, rigid enough to avoid warping, and suitable for creating a sturdy base for the plant. The size also provides ample space for the roots to grow, which is important for larger plants like tomatoes.

What are the two different methods tested for growing tomatoes in the video?

The two methods tested are: one using a 42mm hole for the plant, where the roots are spread more evenly, and the other using a 150mm net pot, which focuses on growing the roots in a vertical column.

What is the role of the saucer in the Kratky setup with a 42mm hole?

The saucer is used to hold growing media and allows the roots to spread outwards as they grow down into the nutrient solution. This setup is intended to promote root expansion across the entire surface area of the container, rather than just forming a cone-shaped root mass.

What is the significance of using cocoa as a growing medium in this hydroponic setup?

Cocoa is chosen as a growing medium because it provides good structure for the roots to spread and ensures good aeration for the plant. It also retains moisture, which is beneficial when the nutrient solution drops below the saucer level.

Why was the creator not using the traditional LED lights for this hydroponic setup?

The creator emphasized that hydroponic gardening, including the Kratky method, can be done outdoors without the need for artificial lighting. This approach makes the system more accessible to people who may not have access to LED lights or indoor growing setups.

What is the role of the net pot in the hydroponic setup?

The net pot is used to hold the plant in place within the container while providing space for the roots to grow downwards into the nutrient solution. It supports the plant and allows for easy monitoring of root growth.

What problems did the creator face during the tomato growth, and how can they be addressed?

The creator faced two main issues: Blossom End Rot, caused by a calcium deficiency, and a rodent problem where the tomatoes were being eaten. To address the calcium deficiency, the creator suggests adding extra calcium to the nutrient solution. To combat the rodent issue, the creator uses traps and avoids using rodent bait to protect pets.

What is the potential benefit of using a float valve in the Kratky system?

A float valve can be used to automatically refill the nutrient solution in the Kratky system, ensuring the water level remains constant. This prevents the roots from drying out and ensures optimal growth without the need for manual top-ups.